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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 mass number of a substance represents the sum of total number of___________________?
A protons and neutrons in an atom
B protons and electrons in an atom
C neutrons and electrons in an atom
D protons and neutrons in a nucleus
Correct Answer: protons and neutrons in a nucleus
The process by which a heavy nucleus is splitted into two light nuclei is known as_________________?
A splitting
B fission
C fusion
D disintegration
Correct Answer: fission
A nuclear fission produces energy of following order in MeV___________________?
A 20
B 200
C 2000
D 20,000
Correct Answer: 20
The breeding gain in case of thermal breeder reactor as compared to fast breeder reactor is________________?
A same
B lower
C higher
D unity
Correct Answer: lower
Which of the following is the heaviest________________?
A neutron
B proton
C atom
D electron
Correct Answer: atom
Enriched uranium is one in which__________________?
A %age of U235 has been artificially in-creased
B %age of U has been artificially increased
C %age of U234 has been artificially in-creased
D extra energy is pumped from outside
Correct Answer: %age of U235 has been artificially in-creased
Which of the following are ferrite materials__________________?
A U233andPu239
B U
C U238andPu239
D U238andTh239
Correct Answer: U
The main interest of shielding in nuclear reactor is protection against_______________?
A X-rays
B infra-red rays
C a, P, and y rays
D neutrons and gamma rays
Correct Answer: neutrons and gamma rays
Moderator in nuclear plants is used to__________________?
A reduce temperature
B extract heat from nuclear reaction
C control the reaction
D cause collision with the fast moving neutrons to reduce their speed
Correct Answer: cause collision with the fast moving neutrons to reduce their speed
The nuclear energy is measured as__________________?
A MeV
B curie
C farads
D MW
Correct Answer: MeV
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