Power Generation MCQs Part 22
Contents
- 1 Demand factor is usually
- 2 Fuel transportation cost is minimum in
- 3 If Q = discharge in m³/s, η = Overall efficiency of plant, h = head in m and w = density of water in kg/m³ then power output in kW of hydro-power station is equal to
- 4 The power system experiences peak demand from
- 5 The majority of generators in thermal power plants run at
Demand factor is usually
Demand factor is usually:
- More than 1
- Equal to 1
- Less than 1
- None of these
Correct answer: 3. Less than 1
Fuel transportation cost is minimum in
Fuel transportation cost is minimum in:
- Steam power plant
- Diesel power plant
- Nuclear power plant
- Hydroelectric power plant
Correct answer: 4. Hydroelectric power plant
If Q = discharge in m³/s, η = Overall efficiency of plant, h = head in m and w = density of water in kg/m³ then power output in kW of hydro-power station is equal to
If Q = discharge in m³/s, η = Overall efficiency of plant, h = head in m and w = density of water in kg/m³ then power output in kW of hydro-power station is equal to:
- 0.736/75 Qwh η
- 0.92/75 Qwh η
- 75/0.736 Qwh η
- 75/0.92 Qwh η
Correct answer: 1. 0.736/75 Qwh η
Solution:
Power output = m g h η = (Qw) * g * h * η = (Qw) * 9.8 * h * η watts
= {(Qw) * g * h * η}/1000 kW = 0.0098 Qwh η kW = 0.736/75 Qwh η
The power system experiences peak demand from
The power system experiences peak demand from:
- Midnight to 8 AM
- 6 PM to 10 PM
- 2 PM to 5 PM
- 8 AM to 2 PM
Correct answer: 2. 6 PM to 10 PM
The majority of generators in thermal power plants run at
The majority of generators in thermal power plants run at:
- 750 RPM
- 1000 RPM
- 1500 RPM
- 3000 RPM
Correct answer: 4. 3000 RPM