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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

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Mechanical Engineering MCQs prepared for job test and interview preparation, especially for fresh graduates, students, and candidates appearing in competitive exams. These multiple-choice questions cover key topics such as Machine Design, Theory of Machines, Hydraulic Machines, and other important mechanical engineering concepts.

All Topics  1919

The coolant used in boiling water reactor is________________?
A Co2
B pressurised water
C mixture of water and steam
D liquid metal
Correct Answer: mixture of water and steam
The most practical fuel for a thermo-nuclear reactor, both from econocical and nuclear consideration is____________________?
A plutonium
B uranium
C deuterium
D thorium
Correct Answer: deuterium
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
Correct Answer: decreased leakage of neutrons
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
Correct Answer: lower temperature and pressure condi-tions
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
Correct Answer: less
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
Correct Answer: slowing down fast neutrons so that Uz fission continues by slow motion neutrons
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
Correct Answer: equal to 1.0
The following present serious difficulty in designing reactor shield_________________?
A alpha particles
B beta particles
C thermal neutrons
D fast neutrons and gamma rays
Correct Answer: fast neutrons and gamma rays
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
Correct Answer: kinetic energy of fission products
In triggering fission, the following types of neutrons are desirable_________________?
A fast moving
B slow moving
C critical neutrons
D neutrons at rest
Correct Answer: slow moving
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