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Power Plant Engineering MCQ Questions & Answers | Mechanical Engineering

Learn Power Plant Engineering MCQ questions & answers are available for a Mechanical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Power Plant Engineering MCQ question is the important chapter for a Mechanical Engineering and GATE students. Page-9 section-1

Each section contains 100 MCQs on Power Plant Engineering .
81
Breeder reactors employ liquid metal coolant because it
Discuss
Answer & Solution
Answer: Option C
Solution:
Breeder reactors employ liquid metal coolant because it transfers heat from core at a fast rate
It has a large specific heat so that it is an efficient heat-transfer fluid. In practice, those reactors which have used liquid metal coolants have been fast-neutron reactors.
82
A pressurized water reactor employs pressurizes for the following application
Discuss
Answer & Solution
Answer: Option A
Solution:
A pressurized water reactor employs pressurizes for maintain constant pressure in primary circuit under varying load
It is contained in a pressurized piping loop. The hot, pressurized water passes through a series of tubes inside the steam generator.
83
Moderator in nuclear plants is used to
Discuss
Answer & Solution
Answer: Option D
Solution:
Neutron moderator. Neutron moderators are a type of material in a nuclear reactor that work to slow down the fast neutrons (produced by splitting atoms in fissile compounds like uranium-235), to make them more effective in the fission chain reaction.
84
Reflector in nuclear plants is used to
Discuss
Answer & Solution
Answer: Option A
Solution:
A reflector is a region of unfueled material surrounding the core. Its function is to scatter neutrons that leak from the core, thereby returning some of them back into the core. This design feature allows for a smaller core siz
85
The presence of reflector in nuclear power plants results in
Discuss
Answer & Solution
Answer: Option D
Solution:
The presence of reflector in nuclear power plants results in Decreased leakage of neutrons.
A reflector is a region of unfueled material surrounding the core. Its function is to scatter neutrons that leak from the core, thereby returning some of them back into the core. This design feature allows for a smaller core size.
86
A moderator generally used in nuclear power plants is
Discuss
Answer & Solution
Answer: Option D
Solution:
A moderator generally used in nuclear power plants is Graphite and concrete
87
The primary fuel used in nuclear power plants is
Discuss
Answer & Solution
Answer: Option A
Solution:
The primary fuel used in nuclear power plants is U235 uranium only 0.7% of natural uranium is 'fissile', or capable of undergoing fission, the process by which energy is produced in a nuclear reactor. The form, or isotope, of uranium which is fissile, is the uranium-235 (U235) isotope.
88
The secondary fuel used in nuclear power plants is
Discuss
Answer & Solution
Answer: Option A
Solution:
The three most relevant fissile isotopes are Uranium-233, Uranium-235 and Plutonium-239.
When the unstable nuclei of these atoms are hit by a slow-moving neutron, they split, creating two daughter nuclei and two or three more neutrons.
These neutrons then go on to split more nuclei.
This creates a self-sustaining chain reaction that is controlled in a nuclear reactor, or uncontrolled in a nuclear weapon.
89
Boiling water reactor employs
Discuss
Answer & Solution
Answer: Option B
Solution:
A boiling water reactor (BWR) uses demineralized water as a coolant and neutron moderator.
Heat is produced by nuclear fission in the reactor core, and this causes the cooling water to boil, producing steam.
90
Ideally the neutron flux in reactor should be
Discuss
Answer & Solution
Answer: Option C
Solution:
Ideally the neutron flux in reactor should be Uniform throughout
Neutron flux is a total number of neutrons crossing a given surface per time unit.
The value of this flux depends on the spatial density of moving neutrons and on their speed.