Explore topic-wise MCQs in Power Plant.

This section includes 16 Mcqs, each offering curated multiple-choice questions to sharpen your Power Plant knowledge and support exam preparation. Choose a topic below to get started.

1.

The electricity fraction of total energy output if W1 and Q1 represents the turbine work and heat output is given by?

A. W1 / (W1 + Q1)
B. W1 / (W1 – Q1)
C. W1 / (W1Q1)
D. W1 / Q1
Answer» B. W1 / (W1 – Q1)
Discussion
2.

In a back pressure turbine _____________

A. pressure at the exhaust from the turbine is the saturation pressure corresponding to the temperature desired in the process
B. pressure at the entrance of the turbine is the saturation pressure corresponding to the temperature desired in the process
C. pressure at the exhaust from the turbine is the saturation pressure corresponding to the pressure desired in the process
D. none of the mentioned
Answer» B. pressure at the entrance of the turbine is the saturation pressure corresponding to the temperature desired in the process
Discussion
3.

WHICH_OF_THE_FOLLOWING_IS_A_GOOD_MEDIUM_FOR_CONSTANT_TEMPERATURE_HEATING??$

A. Water
B. Steam
C. Coolant
D. Diesel
Answer» C. Coolant
Discussion
4.

The electricity fraction of total energy output if W1 and Q1 represents the turbine work and heat output is given by?$

A. W<sub>1</sub> / (W<sub>1</sub> + Q<sub>1</sub>)
B. W<sub>1</sub> / (W<sub>1</sub> – Q<sub>1</sub>)
C. W<sub>1</sub> / (W<sub>1</sub>Q<sub>1</sub>)
D. W<sub>1</sub> / Q<sub>1</sub>
Answer» B. W<sub>1</sub> / (W<sub>1</sub> ‚Äö√Ñ√∂‚àö√ë‚àö¬® Q<sub>1</sub>)
Discussion
5.

The_cogeneration_plant_efficiency_nco_if_WT,_Qi,_QH_represents_turbine_work,_heat_input,_heat_output_respectively_is_given_by?$

A. n<sub>CO</sub> = (W<sub>T</sub> + Q<sub>i</sub>) / Q<sub>H</sub>
B. n<sub>CO</sub> = (W<sub>T</sub> – Q<sub>i</sub>) / Q<sub>H</sub>
C. n<sub>CO</sub> = (W<sub>T</sub> + Q<sub>H</sub>) / Q<sub>i</sub>
D. n<sub>CO</sub> = (W<sub>T</sub> + Q<sub>H</sub>) / Q<sub>i</sub>
Answer» E.
Discussion
6.

Which of these is not considered economical for cogeneration?

A. a high fraction of electric to total energy
B. a low fraction of electric to total energy
C. a low fraction of total energy to electric energy
D. none of the mentioned
Answer» C. a low fraction of total energy to electric energy
Discussion
7.

Pass-out turbines are used in which of these cases?

A. relatively high back pressure
B. small heating requirement
C. only a
D. both a and b
Answer» E.
Discussion
8.

If e is the electricity fraction of the total energy output, m is the electric plant efficiency and n is the steam generator efficiency; the heat added per unit total energy output is given by?

A. (1 / m) + ((1 – e) / n)
B. (1 / n) + ((1 – e) / m)
C. (1 / m) + ((1 + e) / n)
D. (1 / n) + ((1 – e) / m)
Answer» B. (1 / n) + ((1 ‚Äö√Ñ√∂‚àö√ë‚àö¬® e) / m)
Discussion
9.

Back pressure turbine is placed between?

A. Turbine & Pump
B. Boiler & Pump
C. Turbine & Heat Exchanger
D. Boiler & Turbine
Answer» E.
Discussion
10.

Which of these is not an application of back pressure turbine?

A. desalination of sea water
B. filtration of water
C. process industries
D. petrochemical installations
Answer» C. process industries
Discussion
11.

In terms of cost per MW compared to condensing sets of the same power, the back pressure turbines are?

A. more expensive
B. cheaper
C. costly
D. none of the mentioned
Answer» C. costly
Discussion
12.

Back pressure turbines are usually _________________ with respect to their power output.

A. large
B. small
C. very large
D. very small
Answer» C. very large
Discussion
13.

In a by-product power cycle?

A. the power is produced initially
B. power production is in the middle stages of the cycle
C. power production is after the cycle has ended
D. none of the mentioned
Answer» D. none of the mentioned
Discussion
14.

In a back pressure turbine?

A. pressure at the exhaust from the turbine is the saturation pressure corresponding to the temperature desired in the process
B. pressure at the entrance of the turbine is the saturation pressure corresponding to the temperature desired in the process
C. pressure at the exhaust from the turbine is the saturation pressure corresponding to the pressure desired in the process
D. none of the mentioned
Answer» B. pressure at the entrance of the turbine is the saturation pressure corresponding to the temperature desired in the process
Discussion
15.

A plant producing both, electrical power & process heat simultaneously is?

A. Cogenital plant
B. Cogenerial plant
C. Cogeneration plant
D. Conglomerate plant
Answer» D. Conglomerate plant
Discussion
16.

Having two separate units for process heat and power is?

A. useful
B. useless
C. pollution reducing
D. none of the mentioned
Answer» C. pollution reducing
Discussion