Nuclear Power Engineering Mcqs
Q.1: Pick out the wrong statement?
A. -particle emission from a radioactive element makes it electrically negativeN
B. -particle emission from a radioactive element makes it electrically positiveN
C. A radioactive element having a half life period of 20 years will completely disintegrated in 40 yearse
D. The disintegration constant of a radioactive isotope is independent of pressure, temperature or concentrationm
Q.2: Pick out the wrong statement?
A. Atoms with same number of nucleons but different number of protons are called isobarsU
B. Atoms with same number of protons but different number of nucleons are called isotersU
C. Out of , , and -rays, the one having maximum penetration power are -raysP
D. The product formed by emission of -particle has mass number less by 4 units than the parent nuclidee
Q.3: Pick out the wrong statement?
A. The nucleus of a hydrogen atom is identical with a proton9
B. A, -ray particle is identical with an electron0
C. Mass of an electron is about 1/1800th of the lightest nucleus=
D. Positron is heavier than a proton!
Q.4: Pick out the wrong statement?
A. The ratio of the density of the nucleus to that of the atom is 1012O
B. -particle is identical with a doubly charged helium ion9
C. The mass of deuterium atom is half that of helium atom6
D. Gamma rays are high energy electrons$
Q.5: Pick out the correct statement?
A. Positron is the antiparticle of electron(
B. In -decay, the ratio of neutron to proton decreases5
C. Ionising power of -rays is higher than that of -rays8
D. Speed of -rays is more than that of -rays-
Q.6: Pick out the correct statement?
A. Loss of electrons from neutral atoms produces negative ions;
B. The radius of nucleus & atomic size are of the order of 10-12 cm & 10-8 cm respectivelyW
C. Gain of electrons by neutral atoms form cations/
D. Proton to neutron ratio in a stable nucleus is 2 : 14
Q.7: Pick out the wrong statement?
A. The disintegration rate of a radioactive substance cannot be increased by heating itT
B. Electrons have negligible mass and unit negative change7
C. Deuterium atom has one proton and two neutrons in its nucleus=
D. Cadmium is capable of absorbing neutrons(
Q.8: Which one is the radioactive isotope of hydrogen ?2
A. Deuterium
B. Ortho-hydrogen
C. Tritium
D. None of these
Q.9: Candu reactor is a ______________ nuclear reactor?2
A. Natural uranium fuelled heavy water cooled & moderated6
B. Highly enriched uranium (85% U-235) fuelled+
C. Homogeneous
D. Fast breeder
Q.10: Heavy water is used as a moderator in a _____________________?>
A. Pressurised water reactor (PWR)
B. Boiling water reactor (BWR)
C. Candu reactor
D. Molten sodium cooled reactor

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