Nuclear Power Plants Mechanical Online Quiz Questions Test3

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1. Hydrogen is preferred as better coolant in comparison to C02 because former
is lighter	is inert
has high specific heat	is a good conductor

2. Natural uranium is made up of _________.
99.282% U238, 0.712% U235, 0.006% U234	99.282% U235, 0.712% U238, 0.06%' U234
99.282% U234, 0.712% U238, 0.006% U235	99.282% U235, 0.712% U234, 0.006% U238

3. The risk of radioactive hazard is greatest in the turbine with following reactor
pressurised water	boiling water
gas cooled	liquid metal cooled

4. Plutonium is produced
as basic raw material	by neutron irradiation of Uz
by neutron irradiation of throium	artificially

5. Electron-volt is the unit of ______.
atomic power	energy
voltage	radio activity

6. Pick up the wrong statement?
In a heterogeneous or solid-fuel reactor, the fuel is mixed in a regular pattern within moderator.	Slow or thermal neutrons have energy of the order or 0.025 eV
Fast neutrons have energies above 1000 eV	Fast reactor uses moderator

7. The unit of radio-activity is ______.
electron-volt	electron-ampere
curie	MeV

8. Pick up the wrong statement Fast breeder reactors
operate at extremely high power densities.	are liquid metal cooled
produce more fuel than they consume	use water as coolant

9. Uranium-233 is produced
as basic raw material	by neutron irradiation of Uz
by neutron irradiation of thorium	artificially

10. Plutonium-239 is produced
as basic raw material	by neutron irradiation of IT
by neutron irradiation of thorium	artificially

11. Which of the following type of pump is used in liquid metal cooled reactor for circulation of liquid metal
centrifugal	axial
reciprocation	electromagnetic

12. Which of the following is the primary fuel
Ulii	U
U238	Pu:

13. Which of the following is secondary fuel
Th232andU238	U233andPu239
U233andPu238	All of the Above

14. A pressurised water reactor employs pressuriser for the following application
to maintain constant pressure in primary circuit under varying load	to Supply high pressure steam
to increase pressure of water in primary circut	to provide subcooled water at high pressure

15. Which of the following can be used as a coolant in nuclear plant
light or heavy water	molten lead
carbon dioxide	freon

16. Reactors for propulsion applications use
natural uranium	molten lead
any form of uranium	thorium

17. The function of control rods in nuclear plants is to ______.
control temperature	control readioactive pollution
control absorption of neutron	control fuel consumption

18. Breeder reactors employ liquid metal coolant because it
acts as good moderator	produces maximum steam
transfers heat from core at a fast rate	breeds neutrons

19. In triggering fission, which type of neutrons are more effective
fast	slow
in bulk	static

20. For economical operation of a nuclear plant
used fuel should be reprocessed	moderator should be used
coolant should be employed	control rods should be used