Electrical Power Generation MCQs let you test your knowledge of various conventional and non-conventional electric generation units. The multiple-choice questions are targetted on Hydroelectric, steam, coal, nuclear, gas, wind, solar, and other renewable as well as non-renewable sources of electrical power. Various MCQs on components, machines, devices, and structures let you evaluate your own knowledge before appearing in Entry tests, competitive exams, university, and college tests as well as for job interviews.
Contents
- 1 The primary source of energy in the universe is
- 2 The largest source of power generation at present
- 3 Alternator converts ____________ to __________
- 4 The term pulverized features the fuel of
- 5 Low heads employ
- 6 Spillway belongs to which structure
- 7 The condenser in which there is no direct contact between steam and water
- 8 The analysis which provides the complete chemical analysis of coal
- 9 Which of the following doesn’t belong to full admission turbine
- 10 The direction of turbines is reversed in
- 11 In a distribution system, in order to improve power factor, the synchronous capacitors are installed
- 12 During load shedding
- 13 The essential requirement of peak load plant is that
- 14 An over excited synchronous motor on no-load is termed as
- 15 The area under a load curve gives
- 16 Which of following will be least affected due to charge in supply voltage frequency
- 17 The power plant that is invariably used as base load plant
- 18 Which of the below mentioned is the disadvantage of static capacitor for power factor improvement
- 19 For high value of diversity factor, a power station of given installed capacity will be in a position to supply
- 20 The increased load during summer months is because of
- 21 For diesel generating station the useful life is expected to be around
- 22 Diversity factor has direct impact on
- 23 Power plant having maximum demand more than the installed rated capacity will have utilization factor
- 24 A low utilization factor for a plant implies that
- 25 Which of the below mentioned is not a method for estimating depreciation charges
- 26 Generating capacity connected to the bus bars and ready to take load when switched on is termed as
- 27 The major reason for low power factor is supply system is due to installation of
- 28 The power plant that can generate power at unpredictable or uncontrolled times
- 29 Which of following will offer the least load
- 30 A consumer has to pay lesser fixed charges in case of
- 31 The effect of electric shock on human body depends on
- 32 Which of the following should be used for extinguishing electrical fires
- 33 Most efficient plants are generally used as
- 34 Annual depreciation as per straight line method, is calculated by
- 35 A synchronous condenser is virtually which of the following
- 36 When the demand of consumers is not met by a power plant, it will resort to
- 37 Load curve helps in determining
- 38 Generators for peak load plants are typically designed for maximum efficiency at
- 39 The efficiency of a plant is of least concern when it is used as
- 40 Which of the following is invariably used for peak load
- 41 Which of the below-mentioned is not an operating cost
- 42 The disadvantage of low power factor is
- 43 In two part tariff, variation in load factor will affect
- 44 Direct conversion of heat into electrical energy can be achieved using
- 45 Which of following is the reserved generating capacity available for service under emergency conditions which is not kept in operation but in working order
- 46 An alternator coupled to a XYZ runs at slow speed, as compared to others. XYZ can be replaced by
- 47 The generating station that has minimum running cost
- 48 In an interconnected system, the diversity factor of the entire system
- 49 The connected load of a IVMIM uir consumer is about
- 50 Load factor of a power station is defined as
- 51 The space required for a steam power station is
- 52 The draught in locomotive boilers is formed by
- 53 Cooling section in the surface condenser
- 54 Solar thermal power generation can be achieved by
- 55 The percentage O2 by volume in atmosphere air is
- 56 The draught which a chimney produces is termed
- 57 Underfeed stokers work best for XYZ coals high in the volatile matter and with caking tendency. Here XYZ implies
- 58 The effect of considering friction losses in steam nozzle for same pressure ratio leads to
- 59 Compounding of steam turbine is done in order to
- 60 Economizer is used to heat
- 61 Load shedding is possible through
- 62 The knowledge of diversity factor helps to find
- 63 Power plant that cannot have single unit of 100 MW
- 64 Static capacitors are rated in terms of
- 65 The industry that has the least power consumption per tonne of product
- 66 Ships are usually powered by
- 67 Power plant that is expected to have the longest life
- 68 The lightening stroke that is most dangerous
- 69 Maximum demand on a power plant is
- 70 Direct conversion of heat into electric power can be achieved using
- 71 The load factor of domestic load is typically
- 72 Which of the following is not a power source
- 73 Load curve is useful in deciding the
- 74 Power factor can be improved using
- 75 Fuel transportation cost is least in case of
- 76 A load curve shows
- 77 The power plant that is almost inevitably used as base load plant
- 78 In a thermal power plant, the cost that is not fixed
- 79 The salvage value of the plant is always
- 80 The maintenance cost is usually high in case of
- 81 The power source that is least reliable
- 82 With reference to a power stations which of the following is not a fixed cost
- 83 Annual depreciation of the plant is proportional to the earning capacity of the plant vide
- 84 Depreciation charges are high in case of
- 85 In power plants insurance cover is provided for
- 86 Load curve of a power plant has always
- 87 Submarines for under water movement, are powered by
- 88 Which of following is not necessarily an advantage of interconnecting various power stations
- 89 For any type of consumer, the ideal tariff is
- 90 Load factor of a power station is usually
- 91 An induction motor has relatively high power factor at
- 92 The equipment that provides fluctuating load
- 93 Annual instalment towards depreciation reduces as rate of interest increases with
- 94 The power plant that can never have 100 percent load factor
- 95 For a consumer the most economical power factor is usually
- 96 A pilot exciter is provided on generators so as
- 97 The device that may be used to provide protection against lightening over voltages
- 98 The expected useful life of the hydroelectric power plant is about
- 99 Which of the below mentioned are not repayable after a stipulated period
- 100 Air will not be the working substance in case of
The primary source of energy in the universe is
The primary source of energy in the universe is:
- Fuels
- Wind
- Water
- Sun
Correct answer: 4. Sun
Explanation: The most important & primary source of energy is the sun. Sun is responsible for heating the earth’s surface and the Earth heats the air above it, thus resulting in the wind. Water evaporated by the sun forms clouds. The rain results in flowing streams and rivers that in turn provide hydropower.
The largest source of power generation at present
The largest source of power generation at present:
- Coal
- Nuclear
- Water
- Oil
Correct answer: 1. Coal
Explanation:
2019 world electricity generation by source (total generation was 27 PWh)
- Coal (37%)
- Natural gas (24%)
- Hydro (16%)
- Nuclear (10%)
- Wind (5%)
- Solar (3%)
- Other (5%)
Source: https://www.iea.org/data-and-statistics/charts/world-gross-electricity-production-by-source-2019
Alternator converts ____________ to __________
Alternator converts ____________ to __________:
- Mechanical, Electrical (AC)
- Electrical (AC), Mechanical
- Mechanical, Electrical (DC)
- Electrical (DC), Mechanical
Correct answer: 1. Mechanical, Electrical (AC)
Explanation: An alternator is an electrical generator or an electrical machine that converts mechanical energy to electrical energy in the form of an alternating current. The alternator is also known as a synchronous generator. Continue Reading: Synchronous generator MCQs.
The term pulverized features the fuel of
The term pulverized features the fuel of:
- Gas power station
- DAM
- Steam power station
- Wind turbine
Correct answer: Steam power station
Explanation: Pulverization also known as crushing or grinding is defined as the process of applying an external force to coal in order to reduce it into pieces that are smaller than the original size. Pulverization of coal is the favored method since it prepares the coal for burning purposes.
The mechanical pulverization of coal into a fine powder enables it to be burned like a gas, thus leading to its efficient combustion. The term pulverization features the fuel of a steam power station. In steam power station pulverization of coal is carried out before combustion.
Low heads employ
Low heads employ:
- Impulse turbine
- Francis turbine
- Propeller turbine
- Pelton turbine
Correct answer: 3. Propeller turbine
Explanation: Propeller turbine belongs to the class of reaction turbines. Such turbines are generally used for sites with lower head and higher flows. The propeller turbine generally has a runner with three to six blades.
Impulse turbines are generally suitable for high-head, low-flow applications. Francis turbines are usually recommended for medium- to high-head (130- to 2,000-foot) and their use for low heads is rare. Pelton turbine is actually a type of impulse turbine and is generally recommended for high head power plants.
Spillway belongs to which structure
Spillway belongs to which structure:
- Hydroelectric power plant
- Steam power station
- Nuclear power station
- Wind turbine
Correct answer: 1. Hydroelectric power plant
Explanation: Spillway belongs to the hydroelectric power plant and it is a structure constructed in a hydroelectric dam in order to provide a safe path for floodwaters to escape to some downstream area.
The condenser in which there is no direct contact between steam and water
The condenser in which there is no direct contact between steam and cooling water:
- Jet condenser
- Surface condenser
- Both of these
- None of these
Correct answer: 2. Surface condenser
Explanation: A surface condenser is a heat exchanger that converts steam from gaseous to its liquid state at a pressure below atmospheric pressure. A surface condenser is a water-cooled shell and tube heat exchanger that is installed to condense exhaust steam from a steam turbine in thermal power stations.
In a jet condenser, the cooling water and steam are mixed up, however in a surface condenser steam and cooling water are not mixed up.
The analysis which provides the complete chemical analysis of coal
The analysis which provides the complete chemical analysis of coal:
- Ultimate analysis
- Proximate analysis
- Breath analysis
- Life cycle analysis
Correct answer: 1. Ultimate analysis
Explanation: The ultimate analysis of coal involves the determination of the weight percent of carbon as well as sulfur, nitrogen, and oxygen. Trace elements that occur in coal are typically included as a part of the ultimate analysis. The ultimate analysis of coal provides a convenient method for reporting the major organic elemental composition of coal.
Which of the following doesn’t belong to full admission turbine
Which of the following doesn’t belong to full admission turbine:
- Propeller
- Francis
- Kaplan
- Pelton
Correct answer: 4. Pelton
The direction of turbines is reversed in
The direction of turbines is reversed in:
- Run-of-the-river plants
- Pumped storage plants
- Storage plants
- None of these
Correct answer: 2. Pumped storage plants
Explanation: Pumped-storage power plants are reversible hydroelectric facilities wherein water is pumped uphill into a reservoir.
During times when there is very high electricity consumption on the grid, the water from the upper reservoir, carried downhill by a penstock, drives a turbine and a generator in order to generate electric power is used for meeting the increased demand.
However, when demand is low the electricity is taken from the grid to power a pump. The pump sends water from the lower reservoir back up to the upper reservoir. Once in the upper reservoir, water can be discharged again to drive the turbine. In this manner water in the upper reservoir constitutes a stock of gravitational potential energy that can be used when needed.
The turbines in the pumped storage plant could operate as both turbine-generators and in reverse as electric motor-driven pumps.
Watch the working of pumped storage plants in below video:
In a distribution system, in order to improve power factor, the synchronous capacitors are installed
In a distribution system, in order to improve power factor, the synchronous capacitors are installed
- At the receiving end
- At the sending end
- Either of above
- None of above
Correct answer: 1. At the receiving end
During load shedding
During load shedding
- Some loads are switched off
- System frequency is reduced Efficiency is the secondary consideration in
- System power factor is changed
- System voltage is reduced
Correct answer: 1. Some loads are switched off
Also see: Electrical Engineering XYZ article on What is Load Shedding and Why it Happens
The essential requirement of peak load plant is that
The essential requirement of peak load plant is that
- It should be capable of starting quickly
- It should be small in size
- It should produce high voltage
- It should run at high speed
Correct answer: 1. It should be capable of starting quickly
An over excited synchronous motor on no-load is termed as
An over excited synchronous motor on no-load is termed as
- Alternator
- Generator
- Induction motor
- Synchronous condenser
Correct answer: 4. Synchronous condenser
The area under a load curve gives
The area under a load curve gives
- Average demand
- Energy consumed
- Maximum demand
- None of these
Correct answer: 2. Energy consumed
Learn Daily vs Monthly vs Yearly Load Curves here
Which of following will be least affected due to charge in supply voltage frequency
Which of following will be least affected due to charge in supply voltage frequency
- Ceiling fan
- Electric clock
- Mixer grinder
- Room heater
Correct answer: 4. Room heater
The power plant that is invariably used as base load plant
The power plant that is invariably used as base load plant
- Diesel engine plant
- Gas turbine plant
- Nuclear power plant
- Pumped storage plant
Correct answer: 3. Nuclear power plant
Which of the below mentioned is the disadvantage of static capacitor for power factor improvement
Which of the below mentioned is the disadvantage of static capacitor for power factor improvement
- Cannot be repaired
- Easily damaged by high voltage
- Short service life
- All of the above
Correct answer: 4. All of the above
For high value of diversity factor, a power station of given installed capacity will be in a position to supply
For high value of diversity factor, a power station of given installed capacity will be in a position to supply
- Less number of consumers
- More number of consumers
- Neither of above
- Either of above
Correct answer: 2. More number of consumers
The increased load during summer months is because of
The increased load during summer months is because of
- Increased business activity
- Increased use of fans and air conditioners
- Increased water supply
- None of the above
Correct answer: 2. Increased use of fans and air conditioners
For diesel generating station the useful life is expected to be around
For diesel generating station the useful life is expected to be around
- 15 to 20 years
- 20 to 50 years
- 50 to 75 years
- 75 to 100 years
Correct answer: 1. 15 to 20 years
Diversity factor has direct impact on
Diversity factor has direct impact on
- Fixed cost of unit generated
- Running cost of unit generated
- Both of these
- Neither of above
Correct answer: 1. Fixed cost of unit generated
Power plant having maximum demand more than the installed rated capacity will have utilization factor
Power plant having maximum demand more than the installed rated capacity will have utilization factor
- Equal to unity
- Less than unity
- More than unity
- None of these
Correct answer: 3. More than unity
A low utilization factor for a plant implies that
A low utilization factor for a plant implies that
- Plant is under maintenance
- Plant is used for base load only
- Plant is used for peak load as well as base load
- Plant is used for stand by purpose only
Correct answer: 4. Plant is used for stand by purpose only
Which of the below mentioned is not a method for estimating depreciation charges
Which of the below mentioned is not a method for estimating depreciation charges
- Diminishing value method
- Halsey
- Sinking fund method
- Straight line method
Correct answer: 2. Halsey
Generating capacity connected to the bus bars and ready to take load when switched on is termed as
Generating capacity connected to the bus bars and ready to take load when switched on is termed as
- Cold reserve
- Firm power
- Hot reserve
- Spinning reserve
Correct answer: 4. Spinning reserve
The major reason for low power factor is supply system is due to installation of
The major reason for low power factor is supply system is due to installation of
- DC Motors
- Induction motors
- Single phase motors
- Synchronous motors
Correct answer: 2. Induction motors
The power plant that can generate power at unpredictable or uncontrolled times
The power plant that can generate power at unpredictable or uncontrolled times
- Solar power plant
- Tidal power plant
- Wind power plant
- Any of these
Correct answer: 4. Any of these
Which of following will offer the least load
Which of following will offer the least load
- Electric shaver
- Hair dryer
- Television
- Vacuum cleaner
Correct answer: 1. Electric shaver
A consumer has to pay lesser fixed charges in case of
A consumer has to pay lesser fixed charges in case of
- Flat rate tariff
- Maximum demand tariff
- Two part tariff
- Same in all of these
Correct answer: 2. Maximum demand tariff
The effect of electric shock on human body depends on
The effect of electric shock on human body depends on
- Current
- Duration of contact
- Voltage
- All of these
Correct answer: 4. All of these
Which of the following should be used for extinguishing electrical fires
Which of the following should be used for extinguishing electrical fires
- Carbon tetrachloride fire extinguisher
- CO2 fire extinguisher
- Foam type fire extinguisher
- Water
Correct answer: 1. Carbon tetrachloride fire extinguisher
Most efficient plants are generally used as
Most efficient plants are generally used as
- Base load plants
- Peak load plants
- Neither of above
- Either of above
Correct answer: 1. Base load plants
Annual depreciation as per straight line method, is calculated by
Annual depreciation as per straight line method, is calculated by
- Increasing a uniform sum of money per annum at stipulated rate of interest
- The capital cost divided by number of year of life
- The capital cost minus the salvage value, is divided by the number of years of life
- None of these
Correct answer: 3. The capital cost minus the salvage value, is divided by the number of years of life
A synchronous condenser is virtually which of the following
A synchronous condenser is virtually which of the following
- DC generator
- Induction motor
- Over excited synchronous motor
- Under excited synchronous motor
Correct answer: 3. Over excited synchronous motor
When the demand of consumers is not met by a power plant, it will resort to
When the demand of consumers is not met by a power plant, it will resort to
- Efficient plant operation
- Load shedding
- Penalizing high load consumers by increasing the charges for electricity
- Power factor improvement at generators
Correct answer: 2. Load shedding
Load curve helps in determining
Load curve helps in determining
- Operating schedule of generating units
- Sizes of the generating units
- Total installed capacity of the plant
- All of theses
Correct answer: 4. All of theses
Generators for peak load plants are typically designed for maximum efficiency at
Generators for peak load plants are typically designed for maximum efficiency at
- 25 percent overload
- 25 to 50 percent full load
- 50 to 75 percent full load
- Full load
Correct answer: 3. 50 to 75 percent full load
The efficiency of a plant is of least concern when it is used as
The efficiency of a plant is of least concern when it is used as
- Casual run plant
- Peak load plant
- Either 1 or 2
- Base load plant
Correct answer: 3. Either 1 or 2
Which of the following is invariably used for peak load
Which of following is invariably used for peak load
- Nuclear power plant
- Pumped storage plant
- Steam turbine plant
- None of these
Correct answer: 2. Pumped storage plan
Which of the below-mentioned is not an operating cost
Which of the below-mentioned is not an operating cost
- Fuel cost
- Maintenance cost
- Salaries of high officials
- Salaries of operating staff
Correct answer: 3. Salaries of high officials
The disadvantage of low power factor is
The disadvantage of low power factor is
- High cost of equipment for a given load
- Increased transmission losses
- Poor voltage regulation
- All of these
Correct answer: 4. All of these
In two part tariff, variation in load factor will affect
In two part tariff, variation in load factor will affect
- Fixed charges
- Operating or running charges
- Both of these
- Either of 1 and 2
Correct answer: 2. Operating or running charges
Direct conversion of heat into electrical energy can be achieved using
Direct conversion of heat into electrical energy can be achieved using
- Fuel cells
- MHD generators
- Solar cells
- None of the above
Correct answer: 2. MHD generators
Which of following is the reserved generating capacity available for service under emergency conditions which is not kept in operation but in working order
Which of following is the reserved generating capacity available for service under emergency conditions which is not kept in operation but in working order
- Cold reserve
- Firm power
- Hot reserve
- Spinning reserve
Correct answer: 1. Cold reserve
An alternator coupled to a XYZ runs at slow speed, as compared to others. XYZ can be replaced by
An alternator coupled to a XYZ runs at slow speed, as compared to others. XYZ can be replaced by
- Diesel engine
- Gas turbine
- Hydraulic turbine
- Steam turbine
Correct answer: 3. Hydraulic turbine
The generating station that has minimum running cost
The generating station that has minimum running cost
- Diesel
- Hydro
- Nuclear
- Thermal
Correct answer: 2. Hydro
In an interconnected system, the diversity factor of the entire system
In an interconnected system, the diversity factor of the entire system
- Decreases
- Increases
- Remains unchanged
- None of the above
Correct answer: 2. Increases
The connected load of a IVMIM uir consumer is about
The connected load of a IVMIM uir consumer is about
- 120 kw
- 40 kv
- 5 kw
- 80 kw
Correct answer: 3. 5 kw
Load factor of a power station is defined as
Load factor of a power station is defined as
- 2 * Average load * Maximum demand
- Average load * Maximum demand
- Average load/Maximum demand
- Maximum demand/Average load
Correct answer: 3. Average load/Maximum demand
The space required for a steam power station is
The space required for a steam power station is
- Equal to diesel power station
- Less than diesel power station
- More than diesel power station
- None of these
Correct answer: 3. More than diesel power station
The draught in locomotive boilers is formed by
The draught in locomotive boilers is formed by
- Chimney
- Forced fan
- Only motion of locomotive
- Steam jet
Correct answer: 4. Steam jet
Cooling section in the surface condenser
Cooling section in the surface condenser
- Does not affect vapor quantity extracted but reduces pump capacity of air extraction pump
- Increases the quantity of vapor extracted along with air
- Reduces the quantity of vapor extracted along with air
- None of these
Correct answer: 3. Reduces the quantity of vapor extracted along with air
Solar thermal power generation can be achieved by
Solar thermal power generation can be achieved by
- Using a solar pond
- Using flat plate collectors
- Using focusing collector
- Any of these
Correct answer: 4. Any of these
The percentage O2 by volume in atmosphere air is
The percentage O2 by volume in atmosphere air is
- 0.21
- 0.23
- 0.5
- 0.79
Correct answer: 1. 0.21
The draught which a chimney produces is termed
The draught which a chimney produces is termed
- Balanced draught
- Forced draught
- Induced draught
- Natural draught
Correct answer: 4. Natural draught
Underfeed stokers work best for XYZ coals high in the volatile matter and with caking tendency. Here XYZ implies
Underfeed stokers work best for XYZ coals high in volatile matter and with caking tendency. Here XYZ implies
- Anthracite
- Lignite
- Semi-bituminous and bituminous
- All of above
Correct answer: 3. Semi-bituminous and bituminous
The effect of considering friction losses in steam nozzle for same pressure ratio leads to
The effect of considering friction losses in steam nozzle for same pressure ratio leads to
- Decrease in exit velocity from the nozzle
- Increase in exit velocity from the nozzle
- Increase or decrease depending upon the exit quality of steam
- No change in exit velocity from the nozzle
Correct answer: 1. Decrease in exit velocity from the nozzle
Compounding of steam turbine is done in order to
Compounding of steam turbine is done in order to
- Balance the turbine
- Increase the rotor speed
- Reduce the rotor speed
- Reduce the work done
Correct answer: 3. Reduce the rotor speed
Economizer is used to heat
Economizer is used to heat
- Air
- Feed water
- Flue gases
- All of above
Correct answer: 2. Feed water
Load shedding is possible through
Load shedding is possible through
- Frequency reduction
- Switching of the loads
- Voltage reduction
- Any of the above
Correct answer: 4. Any of the above
The knowledge of diversity factor helps to find
The knowledge of diversity factor helps to find
- Average load
- Kwh generated
- Peak load
- Plant capacity
Correct answer: 4. Plant capacity
Power plant that cannot have single unit of 100 MW
Power plant that cannot have single unit of 100 MW
- Diesel
- Hydroelectric
- Nuclear
- Steam
Correct answer: 1. Diesel
Static capacitors are rated in terms of
Static capacitors are rated in terms of
- Kvar
- Kw
- Kwh
- None of these
Correct answer: 1. Kvar
The industry that has the least power consumption per tonne of product
The industry that has the least power consumption per tonne of product
- Caustic soda
- Soap
- Sugar
- Vegetable oil
Correct answer: 4. Vegetable oil
Ships are usually powered by
Ships are usually powered by
- Diesel engines
- Hydraulic turbines
- Nuclear power plants
- Steam accumulators
Correct answer: 1. Diesel engines
Power plant that is expected to have the longest life
Power plant that is expected to have the longest life
- Diesel
- Hydroelectric
- Steam
- Any of these
Correct answer: 2. Hydroelectric
The lightening stroke that is most dangerous
The lightening stroke that is most dangerous
- Direct stroke on ground wire
- Direct stroke on line conductor
- Direct stroke on tower top
- Indirect stroke on conductor
Correct answer: 2. Direct stroke on line conductor
Maximum demand on a power plant is
Maximum demand on a power plant is
- Instantaneous maximum value of kva supplied during a period
- The greatest of all short time interval averaged demand during a period
- Both of these
- None of these
Correct answer: 2. The greatest of all short time interval averaged demand during a period
Direct conversion of heat into electric power can be achieved using
Direct conversion of heat into electric power can be achieved using
- Batteries
- Fuel cell
- Thermionic converter
- All of these
Correct answer: 3. Thermionic converter
The load factor of domestic load is typically
The load factor of domestic load is typically
- 10 to 15%
- 30 to 40%
- 50 to 60%
- 60 to 70%
Correct answer: 1. 10 to 15%
Explanation: Load factor is defined as the ratio of average load to the maximum demand during a given period of time. See complete Formula, Definition and Applications of Load Factor by ElectricalEngineering.XYZ here
Which of the following is not a power source
Which of the following is not a power source
- Photoelectric cell
- Photovoltaic cell
- Solar cell
- Thermocouple
Correct answer: 4. Thermocouple
Also see: Basic Construction and Working of Thermocouple here
Load curve is useful in deciding the
Load curve is useful in deciding the
- Operating schedule of generating units
- Sizes of generating units
- Total installed capacity of the plant
- All of these
Correct answer: 4. All of these
Power factor can be improved using
Power factor can be improved using
- Phase advancers
- Static capacitors
- Synchronous compensators
- Any of the above
Correct answer: 4. Any of the above
Also see: Impact of Power Factor on Handling Capacity of System
Fuel transportation cost is least in case of
Fuel transportation cost is least in case of
- Diesel generating plants
- Nuclear power plants
- Steam power stations
- Same in all of these
Correct answer: 2. Nuclear power plants
Explanation: The unique feature of the nuclear plant is the enormous power capability of nuclear fuel.
Also see: In case of which power plant fuel transportation is the major problem
A load curve shows
A load curve shows
- Average kwh (kw) energy consumption during the period
- Average power used during the period
- Either of the above
- None of the above
Correct answer: 1. Average kwh (kw) energy consumption during the period
Also see: Highest point on daily load curve represents
The power plant that is almost inevitably used as base load plant
The power plant that is almost inevitably used as base load plant
- Diesel engine plant
- Gas turbine plant
- Nuclear power plant
- Pumped storage plant
Correct answer: 3. Nuclear power plant
Explanation: The base load power station supplies load for 24 hours throughout a day.
In a thermal power plant, the cost that is not fixed
In a thermal power plant, the cost that is not fixed
- Depreciation
- Fuel cost
- Insurance charges
- Interest on capital
Correct answer: 2. Fuel cost
The salvage value of the plant is always
The salvage value of the plant is always
- Negative
- Positive
- Zero
- Any of the above
Correct answer: 4. Any of the above
The maintenance cost is usually high in case of
The maintenance cost is usually high in case of
- Diesel engine power plants
- Hydro-electric power plants
- Nuclear power plant
- Thermal power plants
Correct answer: 4. Thermal power plants
Also see: 5 Types of Electrical Equipment at Hydro Power Plants
The power source that is least reliable
The power source that is least reliable
- Geothermal power
- MHD
- Solar energy
- Wind power
Correct answer: 4. Wind power
With reference to a power stations which of the following is not a fixed cost
With reference to a power stations which of the following is not a fixed cost
- Depreciation
- Fuel cost
- Insurance charges
- Interest on capital
Correct answer: 2. Fuel cost
Annual depreciation of the plant is proportional to the earning capacity of the plant vide
Annual depreciation of the plant is proportional to the earning capacity of the plant vide
- Reducing balances depreciation
- Sinking fund depreciation
- Straight line depreciation
- None of these
Correct answer: 1. Reducing balances depreciation
Depreciation charges are high in case of
Depreciation charges are high in case of
- Diesel plant
- Hydroelectric plant
- Thermal plant
- same in all of these
Correct answer: 3. Thermal plant
In power plants insurance cover is provided for
In power plants insurance cover is provided for
- Equipment only
- Skilled workers only
- Unskilled workers only
- All of the above
Correct answer: 4. All of the above
Load curve of a power plant has always
Load curve of a power plant has always
- Negative slope
- Positive slope
- Zero slope
- Any combination of above
Correct answer: 4. Any combination of above
Submarines for under water movement, are powered by
Submarines for under water movement, are powered by
- Air motors
- Batteries
- Diesel engines
- Steam accumulators
Correct answer: 2. Batteries
Which of following is not necessarily an advantage of interconnecting various power stations
Which of following is not necessarily an advantage of interconnecting various power stations
- Economy in operation of plants
- Improved frequency of power supplied
- Increased reliability
- Reduction in total installed capacity
Correct answer: 2. Improved frequency of power supplied
For any type of consumer, the ideal tariff is
For any type of consumer, the ideal tariff is
- Block rate tariff
- Three-part tariff
- Two-part tariff
- All of above
Correct answer: 2. Three-part tariff
Also see: Maximum demand Tarriff here
Load factor of a power station is usually
Load factor of a power station is usually
- Equal to unity
- Equal to zero Diversity factor is always
- Less than unity
- More than unity
Correct answer: 3. Less than unity
An induction motor has relatively high power factor at
An induction motor has relatively high power factor at
- 20 percent load
- Near full load
- No load
- Rated RPM
Correct answer: 2. Near full load
The equipment that provides fluctuating load
The equipment that provides fluctuating load
- Exhaust fan
- Lathe machine
- Welding transformer
- All of these
Correct answer: 3. Welding transformer
Annual instalment towards depreciation reduces as rate of interest increases with
Annual instalment towards depreciation reduces as rate of interest increases with
- Reducing balances depreciation
- Sinking fund depreciation
- Straight line depreciation
- None of these
Correct answer: 2. Sinking fund depreciation
The power plant that can never have 100 percent load factor
The power plant that can never have 100 percent load factor
- Base load plant
- Hydroelectric plant
- Nuclear power plant
- Peak load plant
Correct answer: 4. Peak load plant
For a consumer the most economical power factor is usually
For a consumer the most economical power factor is usually
- 0.5 lagging
- 0.5 leading
- 0.95 lagging
- 0.95 leading
Correct answer: 3. 0.95 lagging
A pilot exciter is provided on generators so as
A pilot exciter is provided on generators so as
- To excite the poles of main exciter
- To provide requisite starting torque to generator
- To provide requisite starting torque to main exciter
- None of these
Correct answer: 1. To excite the poles of main exciter
The device that may be used to provide protection against lightening over voltages
The device that may be used to provide protection against lightening over voltages
- Horn gaps
- Rod gaps
- Surge absorbers
- All of these
Correct answer: 4. All of these
The expected useful life of the hydroelectric power plant is about
The expected useful life of the hydroelectric power plant is about
- 100 years
- 15 years
- 30 years
- 60 years
Correct answer: 1. 100 years
Which of the below mentioned are not repayable after a stipulated period
Which of the below mentioned are not repayable after a stipulated period
- Bonds
- Cash certificates
- Fixed deposits
- Shares
Correct answer: 4. Shares
Air will not be the working substance in case of
Air will not be the working substance in case of
- Closed cycle gas turbine
- Diesel engine
- Open cycle gas turbine
- Petrol engine
Correct answer: 1. Closed cycle gas turbine