Multiple choice questions (MCQ) on Power plant engineering

1. The distinguishing feature of Velox bolier is that it

a. is drumless                                                   b. uses supersonic

c. operates under supercritical pressure              d. uses indirect heating


2. The blow off valve of a boiler helps to

a. provide safety                       b. maintain solids in suspension below a certain value

c. regulate the flow of steam      d. shut down the boiler


3. Match list 1 (materials) and list 2 (application in nuclear reactor) and select the correct answer using the codes given below the lists:

List 1                            List 2

A. Zirconium                             1. Cladding

B. Graphite                               2. Coolant

C. Liquid sodium                       3. Control rod

D. Cadmium                              4. Shield



A          B          C          D

a.         1          –           2          3

b.         1          4          2          3

c.         4          1          3          –

c.         4          –           3          2


4. The overall efficiency of a steam power plant can be increased by

1. increasing the steam pressure

2. increasing the condenser pressure

3. improving turbine blade cooling

4. providing air preheaters

Of these statements

a. 1, 2 and 3 are correct             b. 2 and 3 are correct

c. 1 and 4 are correct                 d. 2 and 4 are correct


5. In a hydroelectric power plant, forebay refers to the

a. beginning of the open channel at the dam                           b. end of penstock at the valve house

c. level where penstock begins                                              d. tail race level at the turbine exit


6. Which of the following pairs is NOT correctly matched?

            Material                        Function in a nuclear reactor

a. Graphite                                Moderator

b. Lead                                     Reflector

c. Uranium-235                          Fuel

d. Concrete                               Biological shield


7. In high pressure water tube boilers, the tube bundles are

a. hung from top grinders          b. supported on brick walls

c. bolted on steel structures       d. firmly fixed on any structure


8. In large power boilers, soot blowers are used at regular intervals for cleaning the tubes. What is the fluid used for the same?

a. Low pressure steam               b. Hot gases                 c. Hot air           d. Boiling water


9. There is no steam drum in

a. Le Mont boiler                                   b. Loeffler boiler

c. Benson boiler                                    d. Velox boiler


10. The function of an economizer in a steam power plant is to

a. increase the temperature of air supplied to a boiler                     b. increase the enthalpy of feed water

c. condense the exhaust steam from the turbine                            d. heat the fuel before combustion