Power Plant Engineering Practice Test 9

1. Graphite is used in nuclear reactor as __________

insulation lining of the reactor

lubricant

fuel

retarder of neutron velocity

2. U-235 content in enriched uranium, that is normally used in power reactors (e.g., at Tarapur atomic power plant), is about __________ percent.

3. Cut-off ratio is the ratio of?

volume at cut-off to swept volume

clearance volume to cut-off volume

cut-off volume to clearance volume

swept volume to volume at cut-off

4. The theoretical indicator diagram of a simple steam engine is based upon the assumption that ___________

there is no pressure drop due to condensation

all of the mentioned

steam is admitted at boiler pressure & exhausted at condenser pressure

the expansion of the steam is hyperbolic

5. Which of the following is a non-fissile material?

U-232

Pu-239

U-235

Th-232

6. The power of a boiler may be defined as __________

the evaporation of 15.653 kg of water per hour from and at 100° C

the ratio of heat actually used in producing the steam to the heat liberated in the furnace

the amount of water evaporated or steam produced in kg per kg of fuel burnt

the amount of water evaporated from and at 100° C into dry and saturated steam

7. Function of control rod in a nuclear reactor is to control __________

absorption of neutrons

temperature

fuel consumption

pressure

8. An economiser is installed in a boiler primarily to ___________

superheat the steam

all of the mentioned

increase steam pressure

reduce fuel consumption

9. Which of the following statement is wrong?

All of the mentioned

La-mont boiler is a low pressure water tube boiler

Water tube boilers are internally fired

Locomotive boiler is a water tube boiler

10. The high steam and low water safety valve is used to blow off steam when the ___________

steam pressure exceeds the working pressure & water level in the boiler becomes too low

water level in the boiler becomes too low

none of the mentioned

steam pressure exceeds the working pressure