Power plant MCQ's Multiple choice questions
1.Out of the following plant categories
(1)Nuclear
(2)Run-of-river
(3)Pump storage.
(4)Diesel plant.
The base load power plants are
Explaination:- Nuclear Power plant and Run of river plants are used as base load because they provide constant load ,running continuously over extended perio
ds of time
2. The diesel plants are mainly used as____?
Explaination:- Diesel plants is a peak load and standby plant as they can be quickly started up to meet sudden high demand for electricity, making them ideal for situations where power needs to be rapidly increased during peak usage.
3. The gas turbine power plant mainly uses which among the following fuels?
Explaination:- While some flexibility exists to use other fuels like diesel, refinery gas, or liquefied petroleum gas (LPG), most gas turbine plants are designed to operate efficiently on natural gas due to its readily available supply and clean burning properties.
4.Steam power plant requires space ?
Explaination:- steam power plant generally requires significantly more space than a diesel power plant, as steam plants need larger infrastructure like boilers and cooling towers, while diesel plants are more compact and can be installed in smaller areas due to their smaller size and simpler design.
5.India's first nuclear power plant was installed at?
Explaination:- India's first nuclear power plant was installed at Tarapur in Maharashtra. It was commissioned in 1969.
6.Economisers improve boiler efficiency by?
Explaination:- Economizers improve boiler efficiency by capturing waste heat from flue gases and using it to preheat feedwater and increase boiler efficiency 4 to 10%.
7.Which of the following are the components of a Steam Power Plant.
Explaination:-
8.Which of the following contributes to the improvement of efficiency of Rankine cycle in a Thermal Power Plant?
Explaination:- The regenerative features effectively raise the nominal cycle heat input temperature, by reducing the addition of heat from the Boiler/fuel source at the relatively low feedwater temperatures that would exist without regenerative feedwater heating
9.What is the maximum content of moisture allowed at the turbine exhaust in the steam power plant?
Explaination:- From the consideration of the erosion of blades in the later stages of a turbine, the maximum moisture content at the turbine exhaust is not allowed to exceed 15%.
10. Which type of nuclear reaction happens in nuclear power plant ?
Explaination:- Nuclear power plants use nuclear fission, a process that splits heavy atoms like uranium-235.
11.Rankine cycle efficiency of a good Steam Power Plant may be in the range of?
0 to 20%
Explaination:- Efficiency of Rankine cycle in actual working condition is found to be between 35 to 45%.
12.Deaerative heating is done to__ ?
Explaination:- Deaerative heating is used to remove dissolved gases from boiler feedwater to improve the efficiency of the boiler system and protect the steam system from corrosion.
13.Pipes carrying steam are generally made up of___
Explaination:- Pipes carrying steam are generally made up of steel, specifically carbon steel, due to its ability to withstand high temperatures and pressures associated with steam applications.
14.The energy radiated by sun on a bright sunny day is approximately?
Explaination:- On a bright sunny day, the energy radiated by the sun is approximately 1000 watts per square meter (W/m²) i.e 1 KW/m²
15.In which of the following power plants spray ponds are used to cool the warm water coming from the condenser?
Explaination:- Spray ponds are used to cool the warm water coming from the condenser in small power plants .
16. In which turbine the pressure energy of water is first converted into kinetic energy by means of nozzle kept close to the runner?
Explaination:-Impulse Turbine is the one in which pressure energy of water is first converted into kinetic energy by means of nozzle kept close to the runner .
17. Solar thermal power generation can be achieved by?
Explaination:- Solar thermal power generation is achieved by using focusing collector or heliostates ,flat plate collectors, solar pond or lenses to concentrate sunlight onto a receiver, which heats a fluid.
18.For forced draught system, the function of chimney is mainly
Explaination:- In a forced draught system, the chimney's main function is to discharge gases high into the atmosphere to prevent air pollution.
19. For the safety of a steam boiler the number of safety valves fitted are ?
Explaination:-For the safety of a steam boiler, typically two safety valves are fitted ,Having multiple safety valves ensures redundancy in case one valve malfunctions, providing better protection against excessive pressure buildup and potential explosions within the boiler.
20. Reheat cycle in steam power plant is used to ?
Explaination:- The reheat cycle increases the turbine work and consequently the net work of the cycle. This is accomplished not by changing the compressor work or the turbine inlet temperature but instead by dividing the turbine expansion into two or more parts with constant pressure heating before each expansion.
Awesome questions 🙏
Very helpful