MCQOPTIONS

Explore topic-wise MCQs in Power Engineering.

This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Power Engineering knowledge and support exam preparation. Choose a topic below to get started.

1.	Match List-I with List-II using the correct code given below: List – I List – IIASolar EnergyIOcean wavesBTidal EnergyIISteam from earthCGeothermal EnergyIIIAtomic fissionDGobar gas plantIVFlat plate collector VAnaerobic digestion
A.	A – I, B – II, C – III, D - IV
B.	A – II, B – III, C – IV, D - V
C.	A – IV, B – I, C – II, D - V
D.	A – V, B – I, C – II, D - III
Answer» D. A – V, B – I, C – II, D - III

2.	In a solar tower power system, each mirror is mounted on a system called
A.	Regenerator
B.	Linear Fresnel
C.	Dish
D.	Heliostat
Answer» E.

3.	Identify the incorrect statement, from the following options.Industrial steam generators that are used in sugar and paper industries or hospitals ______
A.	Can operate with fluidised bed combustors using bales of bagasse
B.	Can be grate (stoker) fired units using coal or wood
C.	Can be fluidised bed units for coal or rice husk
D.	Can be pulverised coal-fired
Answer» B. Can be grate (stoker) fired units using coal or wood

4.	A PV cell is illuminated with irradiance (E) of 1000 W/m2. If the cell is 100 mm ´ 100 mm in size and produces 3 A at 0.5 V at the maximum power point, the conversion efficiency will be
A.	15%
B.	19%
C.	23%
D.	27%
Answer» B. 19%

5.	For a wind turbine 10 m long running at 20 rpm in 12.9 kmph wind, the TSR will be nearly
A.	3.6
B.	5.8
C.	7.6
D.	9.8
Answer» C. 7.6

6.	In solar porous type air heater, the pressure drop is usually
A.	higher than non-porous type
B.	same as in non-porous type
C.	lower than non-porous type
D.	zero
Answer» D. zero

7.	Consider the following statements (A) : Efforts are made to harness non-conventional energy sources for power generation. (R) : The conventional energy sources will be exhausted soon. Now select the answer from the following alternatives.
A.	Both (A) and (R) are true, but (R) is not the correct reason for (A)
B.	(A) is true, but (R) is false
C.	(R) is true, but (A) is false
D.	Both (A) and (R) are true and (R) is the correct reason for (A)
Answer» E.

8.	Centralised collection device for generating power from the Sun is called
A.	Fuel cell
B.	Power tower
C.	Solar collector
D.	Solar photovoltaic
Answer» D. Solar photovoltaic

9.	In which type of collector is solar radiation focused into the absorber from the top, rather than from the bottom?
A.	Concentrating
B.	Compound parabolic
C.	Fresnel lens
D.	Paraboloidal
Answer» B. Compound parabolic

10.	In a drain back solar water heating system
A.	the water in the heat exchanger is recycled
B.	the water is heated in collectors only during times when there is available heat
C.	at the collector, the mixture of water and propylene-glycol is heated and returned to a solar storage tank
D.	there is an expansion tank with enclosed air chamber to assist water draining
Answer» C. at the collector, the mixture of water and propylene-glycol is heated and returned to a solar storage tank

11.	In a wind turbine, ______ measures the wind direction and guides the yaw drive to position the rotor to face the wind.
A.	Speedometer
B.	Wind vane
C.	Anemometer
D.	None of these
Answer» C. Anemometer

12.	Fuel cell runs on
A.	methane
B.	nitrogen
C.	petrol
D.	hydrogen
Answer» E.

13.	A surface having high absorptance for shortwave radiation (less than 2.5 μm) and a low emittance of long-wave radiation (more than 2.5 μm), is called
A.	Absorber
B.	Emitter
C.	Selective
D.	Black
Answer» D. Black

14.	A flat plate collector is 150 cm wide and 180 cm high and is oriented such that it is perpendicular to the sun rays. Its active area is 90% of the panel size. If it is in a location that receives solar insolation of 1000 W/m2 peak, the peak power delivered to the area of the collector will be
A.	1.23 kW
B.	2.43 kW
C.	4.46 kW
D.	6.26 kW
Answer» C. 4.46 kW