Mechanical Engineering MCQs

2075 MCQs (Page 32 of 208)

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In triggering fission, the following types of neutrons are desirable_________________?

A. Fast moving
B. Slow moving
C. Critical neutrons
D. Neutrons at rest

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In a fission process, maximum %age of energy is released as___________________?

A. Kinetic energy of neutrons
B. Kinetic energy of fission products
C. Instantaneous release of gamma rays
D. Gradual readioactive decay of fission products

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The following present serious difficulty in designing reactor shield_________________?

A. Alpha particles
B. Beta particles
C. Thermal neutrons
D. Fast neutrons and gamma rays

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In order to have constant clain reaction to produce a constant rate of heat output, the value of ratio of the number of neutrons in one generation to the number of neutrons in the immediately preceding generation must be________________?

A. Greater than 1.0
B. Less than 1.0
C. Equal to zero
D. Equal to 1.0

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A fission chain reaction in uranium can be developed by________________?

A. Slowing down fast neutrons so that uz fission continues by slow motion neutrons
B. Accelerating fast neutrons
C. Absorbing all neutrons
D. Using moderator

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The fuel needed, with reflector in nuclear power plant, in order to generate sufficient neutrons to sustain a chain reaction, would be________________?

A. More
B. Less
C. Same
D. Zero

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The efficiency of a nuclear power plant in comparison to conventional and nuclear consideration is__________________?

A. Higher cost of nuclear fuel
B. High initial cost
C. High heat rejection in condenser
D. Lower temperature and pressure condi-tions

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The presence of reflector in nuclear power plants results in___________________?

A. Increased production of neutrons
B. Complete absorption of neutrons
C. Controlled production of neutrons
D. Decreased leakage of neutrons

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The most practical fuel for a thermo-nuclear reactor, both from econocical and nuclear consideration is____________________?

A. Plutonium
B. Uranium
C. Deuterium
D. Thorium

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The coolant used in boiling water reactor is________________?

A. Co2
B. Pressurised water
C. Mixture of water and steam
D. Liquid metal

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