Power Generation MCQs Part 23
Contents
- 1 If plant capacity equals the maximum demand, then, the value of load factor
- 2 In hydroelectric power station, the effective head is H meters and rate of waterflow is Q m³/sec. The hydraulic power available in kW is
- 3 Diversity factor * Maximum demand is
- 4 The plant that is free from environmental problems
- 5 In which part of thermal power plant, the steam pressure is less than that of atmosphere
- 6 The load power factor of power plant is
If plant capacity equals the maximum demand, then, the value of load factor
If plant capacity equals the maximum demand, then, the value of load factor:
- Is less than plant capacity factor
- Is equal to plant capacity factor
- Is more than plant capacity factor
- None of these
Correct answer: 2. Is equal to plant capacity factor
Explanation: Plant capacity Factor = Average demand / Plant capacity
Here plant capacity = Maximum demand
Plant capacity factor = Average demand / Maximum demand
The Average demand equals Load Factor * Maximum demand
Plant capacity factor = (Load factor * Maximum demand) / Maximum demand So Plant capacity factor = Load factor
In hydroelectric power station, the effective head is H meters and rate of waterflow is Q m³/sec. The hydraulic power available in kW is
In hydroelectric power station, the effective head is H meters and rate of waterflow is Q m³/sec. The hydraulic power available in kW is:
- P = 9.8 QH
- P = 56 QH
- P = 92 QH
- P = 128.5 QH
Correct answer: 1. P = 9.8 QH
Explanation:
P = mgh = mass of water * g * water head
= volume of water in m³ * Density of water * g * H
= Q * 1000 * 9.8 * H watts = 9.8 QH kW
Diversity factor * Maximum demand is
Diversity factor * Maximum demand is:
- Installed capacity
- Generated power
- Average demand
- Sum of consumer’s maximum demand
Correct answer: 4. Sum of consumer’s maximum demand
The plant that is free from environmental problems
The plant that is free from environmental problems:
- Diesel engine
- Hydroelectric
- Nuclear
- Steam
Correct answer: 2. Hydroelectric
In which part of thermal power plant, the steam pressure is less than that of atmosphere
In which part of thermal power plant, the steam pressure is less than that of atmosphere:
- Turbine
- Boiler
- Condenser
- Superheater
Correct answer: 3. Condenser
Explanation: A condenser condenses steam at the exhaust of turbine. This creates low pressure at the exhaust of turbine, thus converting heat energy of steam into mechanical energy.
The load power factor of power plant is
The load power factor of power plant is:
- Generally equal to 1
- Always less than 1
- Always more than 1
- None of above
Correct answer: 2. Always less than 1