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Mechanical Engineering Objective Questions { Nuclear Power Plants }



29. Which of the following can be used as a coolant in nuclear plant
A.Light or heavy water
B.Molten lead
C.Carbon dioxide
D.Freon

30. Gas cooled reactor uses following materials as moderator, and coolant
A.Graphite, CO2
B.Graphite, air
C.Heavy water, CO2
D.Lead, H2

31. When a reactor becomes critical, then the production of neutrons is
A.Infinite
B.Zero
C.Exactly balanced by the loss of neutrons through leakage
D.Initiated

32. The following present serious difficulty in designing reactor shield
A.Alpha particles
B.Beta particles
C.Thermal neutrons
D.Fast neutrons and gamma rays

33. Which of the following particles is the lightest
A.Nucleus
B.Electron
C.Proton
D.Meson

34. The size of the reactor is said to be critical when
A.Chain reaction can be initiated
B.It becomes uncontrollable
C.It explodes
D.It produces no power

35. In the breeder reactors the generation of new fissionable atom is
A.At the lower rate than the consumption
B.At a higher rate than the consumption
C.At an equal rate of the consumption
D.Depends on other considerations

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