1) Supertheated steam is generated in following reactor________________? a. boiling water b. gas cooled c. pressurised water d. all of the above e. none of the above
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2) 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 constuption c. at an equal rate of the consumption d. depends on other considerations e. unpredictable
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3) 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 e. stopped
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4) Reactors designed for propulsion applications are designed for_______________? a. natural uranium b. enriched uranium c. pure uranium d. any type of uranium e. none of the above
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5) Solid- fuel for nuclear reactions may be fabricated into various small shapes such as___________________? a. plates b. pallets c. pins d. any one of the above e. none of the above
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6) Which of the following is more appropriate for a moderator. One which_________________? a. does not absorb neutrons b. absorbs neutrons c. accelerates neutrons d. eats up neutrons e. regenerates neutrons
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7) In triggering fission, the following types of neutrons are desirable_________________? a. fast moving b. slow moving c. critical neutrons d. neutrons at rest e. none of the above
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8) 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 e. none of the above
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9) The following present serious difficulty in designing reactor shield_________________? a. alpha particles b. beta particles c. thermal neutrons d. fast neutrons and gamma rays e. none of the above
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10) 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 e. equal to infinity
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