Electrical Power Generation MCQs – 1000+ Power Generation Objective Multiple Choice Questions and Answers

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.

The primary source of energy in the universe is

The primary source of energy in the universe is:

1. Fuels
2. Wind
3. Water
4. 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:

1. Coal
2. Nuclear
3. Water
4. Oil

Correct answer: 1. Coal

Explanation:

2019 world electricity generation by source (total generation was 27 PWh)

1. Coal (37%)
2. Natural gas (24%)
3. Hydro (16%)
4. Nuclear (10%)
5. Wind (5%)
6. Solar (3%)
7. Other (5%)

Source: https://www.iea.org/data-and-statistics/charts/world-gross-electricity-production-by-source-2019

Alternator converts ____________ to __________

Alternator converts ____________ to __________:

1. Mechanical, Electrical (AC)
2. Electrical (AC), Mechanical
3. Mechanical, Electrical (DC)
4. 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:

1. Gas power station
2. DAM
3. Steam power station
4. 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:

1. Impulse turbine
2. Francis turbine
3. Propeller turbine
4. 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:

1. Hydroelectric power plant
2. Steam power station
3. Nuclear power station
4. 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.

Read more EEMCQs here

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:

1. Jet condenser
2. Surface condenser
3. Both of these
4. 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:

1. Ultimate analysis
2. Proximate analysis
3. Breath analysis
4. 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:

1. Propeller
2. Francis
3. Kaplan
4. Pelton

Correct answer: 4. Pelton

The direction of turbines is reversed in

The direction of turbines is reversed in:

1. Run-of-the-river plants
2. Pumped storage plants
3. Storage plants
4. 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

1. At the receiving end
2. At the sending end
3. Either of above
4. None of above

Correct answer: 1. At the receiving end

During load shedding

During load shedding

1. Some loads are switched off
2. System frequency is reduced Efficiency is the secondary consideration in
3. System power factor is changed
4. 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

1. It should be capable of starting quickly
2. It should be small in size
3. It should produce high voltage
4. 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

1. Alternator
2. Generator
3. Induction motor
4. Synchronous condenser

Correct answer: 4. Synchronous condenser

The area under a load curve gives

The area under a load curve gives

1. Average demand
2. Energy consumed
3. Maximum demand
4. 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

1. Ceiling fan
2. Electric clock
3. Mixer grinder
4. 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

1. Diesel engine plant
2. Gas turbine plant
3. Nuclear power plant
4. 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

1. Cannot be repaired
2. Easily damaged by high voltage
3. Short service life
4. 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

1. Less number of consumers
2. More number of consumers
3. Neither of above
4. 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

1. Increased business activity
2. Increased use of fans and air conditioners
3. Increased water supply
4. 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

1. 15 to 20 years
2. 20 to 50 years
3. 50 to 75 years
4. 75 to 100 years

Correct answer: 1. 15 to 20 years

Diversity factor has direct impact on

Diversity factor has direct impact on

1. Fixed cost of unit generated
2. Running cost of unit generated
3. Both of these
4. 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

1. Equal to unity
2. Less than unity
3. More than unity
4. 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

1. Plant is under maintenance
2. Plant is used for base load only
3. Plant is used for peak load as well as base load
4. 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

1. Diminishing value method
2. Halsey
3. Sinking fund method
4. 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

1. Cold reserve
2. Firm power
3. Hot reserve
4. 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

1. DC Motors
2. Induction motors
3. Single phase motors
4. 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

1. Solar power plant
2. Tidal power plant
3. Wind power plant
4. 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

1. Electric shaver
2. Hair dryer
3. Television
4. 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

1. Flat rate tariff
2. Maximum demand tariff
3. Two part tariff
4. 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

1. Current
2. Duration of contact
3. Voltage
4. 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

1. Carbon tetrachloride fire extinguisher
2. CO₂ fire extinguisher
3. Foam type fire extinguisher
4. Water

Correct answer: 1. Carbon tetrachloride fire extinguisher

Most efficient plants are generally used as

Most efficient plants are generally used as

1. Base load plants
2. Peak load plants
3. Neither of above
4. 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

1. Increasing a uniform sum of money per annum at stipulated rate of interest
2. The capital cost divided by number of year of life
3. The capital cost minus the salvage value, is divided by the number of years of life
4. 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

1. DC generator
2. Induction motor
3. Over excited synchronous motor
4. 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

1. Efficient plant operation
2. Load shedding
3. Penalizing high load consumers by increasing the charges for electricity
4. Power factor improvement at generators

Correct answer: 2. Load shedding

Load curve helps in determining

Load curve helps in determining

1. Operating schedule of generating units
2. Sizes of the generating units
3. Total installed capacity of the plant
4. 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

1. 25 percent overload
2. 25 to 50 percent full load
3. 50 to 75 percent full load
4. 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

1. Casual run plant
2. Peak load plant
3. Either 1 or 2
4. 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

1. Nuclear power plant
2. Pumped storage plant
3. Steam turbine plant
4. 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

1. Fuel cost
2. Maintenance cost
3. Salaries of high officials
4. 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

1. High cost of equipment for a given load
2. Increased transmission losses
3. Poor voltage regulation
4. 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

1. Fixed charges
2. Operating or running charges
3. Both of these
4. 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

1. Fuel cells
2. MHD generators
3. Solar cells
4. 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

1. Cold reserve
2. Firm power
3. Hot reserve
4. 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

1. Diesel engine
2. Gas turbine
3. Hydraulic turbine
4. Steam turbine

Correct answer: 3. Hydraulic turbine

The generating station that has minimum running cost

The generating station that has minimum running cost

1. Diesel
2. Hydro
3. Nuclear
4. 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

1. Decreases
2. Increases
3. Remains unchanged
4. 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

1. 120 kw
2. 40 kv
3. 5 kw
4. 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

1. 2 * Average load * Maximum demand
2. Average load * Maximum demand
3. Average load/Maximum demand
4. 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

1. Equal to diesel power station
2. Less than diesel power station
3. More than diesel power station
4. 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

1. Chimney
2. Forced fan
3. Only motion of locomotive
4. Steam jet

Correct answer: 4. Steam jet

Cooling section in the surface condenser

Cooling section in the surface condenser

1. Does not affect vapor quantity extracted but reduces pump capacity of air extraction pump
2. Increases the quantity of vapor extracted along with air
3. Reduces the quantity of vapor extracted along with air
4. 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

1. Using a solar pond
2. Using flat plate collectors
3. Using focusing collector
4. 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

1. 0.21
2. 0.23
3. 0.5
4. 0.79

Correct answer: 1. 0.21

The draught which a chimney produces is termed

The draught which a chimney produces is termed

1. Balanced draught
2. Forced draught
3. Induced draught
4. 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

1. Anthracite
2. Lignite
3. Semi-bituminous and bituminous
4. 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

1. Decrease in exit velocity from the nozzle
2. Increase in exit velocity from the nozzle
3. Increase or decrease depending upon the exit quality of steam
4. 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

1. Balance the turbine
2. Increase the rotor speed
3. Reduce the rotor speed
4. Reduce the work done

Correct answer: 3. Reduce the rotor speed

Economizer is used to heat

Economizer is used to heat

1. Air
2. Feed water
3. Flue gases
4. All of above

Correct answer: 2. Feed water

Load shedding is possible through

Load shedding is possible through

1. Frequency reduction
2. Switching of the loads
3. Voltage reduction
4. 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

1. Average load
2. Kwh generated
3. Peak load
4. 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

1. Diesel
2. Hydroelectric
3. Nuclear
4. Steam

Correct answer: 1. Diesel

Static capacitors are rated in terms of

Static capacitors are rated in terms of

1. Kvar
2. Kw
3. Kwh
4. 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

1. Caustic soda
2. Soap
3. Sugar
4. Vegetable oil

Correct answer: 4. Vegetable oil

Ships are usually powered by

Ships are usually powered by

1. Diesel engines
2. Hydraulic turbines
3. Nuclear power plants
4. 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

1. Diesel
2. Hydroelectric
3. Steam
4. Any of these

Correct answer: 2. Hydroelectric

The lightening stroke that is most dangerous

The lightening stroke that is most dangerous

1. Direct stroke on ground wire
2. Direct stroke on line conductor
3. Direct stroke on tower top
4. 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

1. Instantaneous maximum value of kva supplied during a period
2. The greatest of all short time interval averaged demand during a period
3. Both of these
4. 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

1. Batteries
2. Fuel cell
3. Thermionic converter
4. All of these

Correct answer: 3. Thermionic converter

The load factor of domestic load is typically

The load factor of domestic load is typically

1. 10 to 15%
2. 30 to 40%
3. 50 to 60%
4. 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

1. Photoelectric cell
2. Photovoltaic cell
3. Solar cell
4. 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

1. Operating schedule of generating units
2. Sizes of generating units
3. Total installed capacity of the plant
4. All of these

Correct answer: 4. All of these

Power factor can be improved using

Power factor can be improved using

1. Phase advancers
2. Static capacitors
3. Synchronous compensators
4. 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

1. Diesel generating plants
2. Nuclear power plants
3. Steam power stations
4. 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

1. Average kwh (kw) energy consumption during the period
2. Average power used during the period
3. Either of the above
4. 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

1. Diesel engine plant
2. Gas turbine plant
3. Nuclear power plant
4. 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

1. Depreciation
2. Fuel cost
3. Insurance charges
4. Interest on capital

Correct answer: 2. Fuel cost

The salvage value of the plant is always

The salvage value of the plant is always

1. Negative
2. Positive
3. Zero
4. 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

1. Diesel engine power plants
2. Hydro-electric power plants
3. Nuclear power plant
4. 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

1. Geothermal power
2. MHD
3. Solar energy
4. 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

1. Depreciation
2. Fuel cost
3. Insurance charges
4. 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

1. Reducing balances depreciation
2. Sinking fund depreciation
3. Straight line depreciation
4. None of these

Correct answer: 1. Reducing balances depreciation

Depreciation charges are high in case of

Depreciation charges are high in case of

1. Diesel plant
2. Hydroelectric plant
3. Thermal plant
4. 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

1. Equipment only
2. Skilled workers only
3. Unskilled workers only
4. 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

1. Negative slope
2. Positive slope
3. Zero slope
4. 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

1. Air motors
2. Batteries
3. Diesel engines
4. 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

1. Economy in operation of plants
2. Improved frequency of power supplied
3. Increased reliability
4. 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

1. Block rate tariff
2. Three-part tariff
3. Two-part tariff
4. 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

1. Equal to unity
2. Equal to zero Diversity factor is always
3. Less than unity
4. 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

1. 20 percent load
2. Near full load
3. No load
4. Rated RPM

Correct answer: 2. Near full load

The equipment that provides fluctuating load

The equipment that provides fluctuating load

1. Exhaust fan
2. Lathe machine
3. Welding transformer
4. 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

1. Reducing balances depreciation
2. Sinking fund depreciation
3. Straight line depreciation
4. 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

1. Base load plant
2. Hydroelectric plant
3. Nuclear power plant
4. 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

1. 0.5 lagging
2. 0.5 leading
3. 0.95 lagging
4. 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

1. To excite the poles of main exciter
2. To provide requisite starting torque to generator
3. To provide requisite starting torque to main exciter
4. 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

1. Horn gaps
2. Rod gaps
3. Surge absorbers
4. 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

1. 100 years
2. 15 years
3. 30 years
4. 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

1. Bonds
2. Cash certificates
3. Fixed deposits
4. 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

1. Closed cycle gas turbine
2. Diesel engine
3. Open cycle gas turbine
4. Petrol engine

Correct answer: 1. Closed cycle gas turbine