MCQOPTIONS
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MCQOPTIONS
This section includes 317 Mcqs, each offering curated multiple-choice questions to sharpen your ENGINEERING SERVICES EXAMINATION (ESE) knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
Plutonium (Pu₂₃₉) is produced |
| A. | Artificially |
| B. | By fission of Th₂₃₂ |
| C. | When U₂₃₈ is irradiated by neutrons |
| D. | As basic raw material |
| Answer» D. As basic raw material | |
| 102. |
Plutonium (Pu239) is produced |
| A. | Artificially |
| B. | When U238 is irradiated by neutrons |
| C. | By fission of Th232 |
| D. | As basic raw material |
| Answer» C. By fission of Th232 | |
| 103. |
U₂₃₃ is produced |
| A. | Artificially |
| B. | As basic raw material |
| C. | When thorium is irradiated by neutrons |
| D. | By fission of U₂₃₈ |
| Answer» D. By fission of U₂₃₈ | |
| 104. |
U233 is produced |
| A. | As basic raw material |
| B. | By neutron irradiation of Uz |
| C. | By neutron irradiation of thorium |
| D. | Artificially |
| Answer» D. Artificially | |
| 105. |
Atomic number of an element in the periodic table represents the numbers of |
| A. | Protons in the nucleus |
| B. | Electrons in the nucleus |
| C. | Neutrons in the nucleus |
| D. | Electrons in the atom |
| Answer» B. Electrons in the nucleus | |
| 106. |
Each fission of U₂₃₅ produces following number of fast neutrons per fission |
| A. | 1 neutron |
| B. | 3 neutrons |
| C. | 1, 2 neutrons |
| D. | 2 neutrons |
| Answer» E. | |
| 107. |
In boiling water reactor, moderator is |
| A. | Coolant itself |
| B. | Ferrite rod |
| C. | Graphite rod |
| D. | Liquid sodium metal |
| Answer» B. Ferrite rod | |
| 108. |
Which of the following is the primary fuel? |
| A. | U₂₃₃ |
| B. | U |
| C. | U₂₃₈ |
| D. | Pu |
| Answer» C. U₂₃₈ | |
| 109. |
The nuclear radiators produced in a reactor which must be shielded are |
| A. | Electrons |
| B. | α, β and γ rays |
| C. | Neutron and gamma rays |
| D. | None of these |
| Answer» D. None of these | |
| 110. |
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 consumption |
| C. | At an equal rate of the consumption |
| D. | Depends on other considerations |
| Answer» C. At an equal rate of the consumption | |
| 111. |
A reactor capable of converting a ferrite material into fissile isotopes is called |
| A. | Regenerative reactor |
| B. | Fast breeder reactor |
| C. | Breeder reactor |
| D. | Boiling water reactor |
| Answer» B. Fast breeder reactor | |
| 112. |
Enriched uranium may contain fissionable contents of the order of |
| A. | 1-99% |
| B. | 1-25% |
| C. | 1-50% |
| D. | 1-75% |
| Answer» B. 1-25% | |
| 113. |
Ferrite material is |
| A. | The most fissionable material |
| B. | The basic fuel for nuclear paints |
| C. | Basic raw material for nuclear plants |
| D. | The material which absorbs neutrons and undergoes spontaneous changes leading to the formation of fissionable material |
| Answer» E. | |
| 114. |
The main interest of shielding in nuclear reactor is protection against |
| A. | X-rays |
| B. | Infrared rays |
| C. | Neutrons and gamma rays |
| D. | Electrons |
| Answer» D. Electrons | |
| 115. |
In natural uranium, the constituents of three naturally occurring isotopes are |
| A. | U₂₃₄ = 0.006%, U₂₃₅ = 0.712% and U₂₃₈ = 99.282% |
| B. | U₂₃₄ = 0.712%, U₂₃₅ = 0.006% and U₂₃₈ = 99.282% |
| C. | U₂₃₄ = 99.282%, U₂₃₅ = 0.006% and U₂₃₈ = 0.712% |
| D. | U₂₃₄ = 0.006%, U₂₃₅ = 99.282% and U₂₃₈ = 0.712% |
| Answer» B. U₂₃₄ = 0.712%, U₂₃₅ = 0.006% and U₂₃₈ = 99.282% | |
| 116. |
The energy produced by a thermal reactor of same size as a breeder reactor is |
| A. | Almost same |
| B. | Slightly more |
| C. | Slightly less |
| D. | Much less |
| Answer» E. | |
| 117. |
The breeding gain in case of thermal breeder reactor as compared to fast breeder reactor is |
| A. | Same |
| B. | Lower |
| C. | Higher |
| D. | Unity |
| Answer» C. Higher | |
| 118. |
Nuclear reactors are used |
| A. | To produce heat for thermoelectric power |
| B. | To produce fissionable material |
| C. | To propel ships, submarines, aircrafts |
| D. | All of these |
| Answer» E. | |
| 119. |
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 conditions |
| Answer» E. | |
| 120. |
A fission chain reaction in uranium can be developed |
| A. | By increasing the contents of U₂₃₅ |
| B. | By slowing down fast neutrons so that U₂₃₅ fission continues by slow neutron |
| C. | Both (A) and (B) |
| D. | None of these |
| Answer» D. None of these | |
| 121. |
In a thermal power plant, coal from the coal handling plant is moved to the boiler bunker through a |
| A. | Belt conveyor |
| B. | Bucket conveyor |
| C. | Fork lift truck |
| D. | Overhead crane |
| Answer» B. Bucket conveyor | |
| 122. |
Pick up the wrong statement fast breeder reactors |
| A. | Operate at extremely high power densities |
| B. | Are liquid metal cooled |
| C. | Produce more fuel than they consume |
| D. | Use water as coolant |
| Answer» E. | |
| 123. |
In fast breeder reactors |
| A. | Any type of moderator can be used |
| B. | Graphite is used as the moderator |
| C. | Heavy water is used as the moderator |
| D. | Moderator is dispensed with |
| Answer» E. | |
| 124. |
Ideally the neutron flux in reactor should be |
| A. | Maximum in centre and zero at side |
| B. | Maximum at side and zero in canter |
| C. | Uniform throughout |
| D. | Zero throughout |
| Answer» D. Zero throughout | |
| 125. |
Boiling water reactor employs |
| A. | Boiler |
| B. | Direct cycle of coolant system |
| C. | Double circuit system of coolant cycle |
| D. | Multi passes system |
| Answer» C. Double circuit system of coolant cycle | |
| 126. |
The secondary fuel used in nuclear power plants is |
| A. | U₂₃₃ and Pu₂₃₉ |
| B. | U₂₃₅ and Th₂₃₂ |
| C. | U₂₃₅ and Pu₂₃₈ |
| D. | U₂₃₃ and Pu₂₃₈ |
| Answer» B. U₂₃₅ and Th₂₃₂ | |
| 127. |
The primary fuel used in nuclear power plants is |
| A. | U₂₃₅ |
| B. | U₂₃₈ |
| C. | Pu₂₃₉ |
| D. | Pu₂₃₃ |
| Answer» B. U₂₃₈ | |
| 128. |
A moderator generally used in nuclear power plants is |
| A. | Graphite |
| B. | Heavy water |
| C. | Concrete |
| D. | Graphite and concrete |
| Answer» E. | |
| 129. |
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 |
| Answer» E. | |
| 130. |
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 |
| Answer» E. | |
| 131. |
A pressurized water reactor employs pressurizes for the following application |
| A. | To maintain constant pressure in primary circuit under varying load |
| B. | To Supply high pressure steam |
| C. | To increase pressure of water in primary circuit |
| D. | To provide sub cooled water at high pressure |
| Answer» B. To Supply high pressure steam | |
| 132. |
Breeder reactors employ liquid metal coolant because it |
| A. | Acts as good moderator |
| B. | Produces maximum steam |
| C. | Transfers heat from core at a fast rate |
| D. | Breeds neutrons |
| Answer» D. Breeds neutrons | |
| 133. |
In triggering fission, the following types of neutrons are desirable |
| A. | Fast moving |
| B. | Slow moving |
| C. | Critical neutrons |
| D. | Neutrons at rest |
| Answer» C. Critical neutrons | |
| 134. |
The energy released during the fission of one atom of Uranium 235 in million electron volts is about |
| A. | 100 |
| B. | 200 |
| C. | 300 |
| D. | 400 |
| Answer» C. 300 | |
| 135. |
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 |
| Answer» D. Initiated | |
| 136. |
Half life of a radioactive isotope corresponds to the time required for half of the following to decay |
| A. | Electrons |
| B. | Protons |
| C. | Neutrons |
| D. | Atom |
| Answer» E. | |
| 137. |
Hydrogen is preferred as better coolant in comparison to CO₂ because former |
| A. | Is lighter |
| B. | Is inert |
| C. | Has high specific heat |
| D. | Is a good conductor |
| Answer» D. Is a good conductor | |
| 138. |
Breeder reactor has a conversion ratio of |
| A. | Unity |
| B. | More than unity |
| C. | Less than unity |
| D. | Zero |
| Answer» C. Less than unity | |
| 139. |
The most commonly used moderator in nuclear plants is |
| A. | Heavy water |
| B. | Concrete and bricks |
| C. | Graphite and concrete |
| D. | Graphite |
| Answer» E. | |
| 140. |
Uranium has isotopes |
| A. | U₂₃₄ |
| B. | U₂₃₅ |
| C. | U₂₃₈ |
| D. | All of these |
| Answer» E. | |
| 141. |
The following present serious difficulty in designing reactor shield |
| A. | Alpha particles |
| B. | Beta particles |
| C. | Thermal neutrons |
| D. | Fast neutrons and gamma rays |
| Answer» E. | |
| 142. |
A nuclear unit becoming critical means |
| A. | It is generating power to rated capacity |
| B. | It is capable of generating much more than rated capacity |
| C. | There is danger of nuclear spread |
| D. | Chain reaction that causes automatic splitting of the fuel nuclei has been established |
| Answer» E. | |
| 143. |
U238 will undergo fission by |
| A. | High energy (fast) neutrons alone |
| B. | Low energy (slow) neutrons alone |
| C. | Either fast or slow neutrons |
| D. | Medium energy neutrons |
| Answer» B. Low energy (slow) neutrons alone | |
| 144. |
U235 will undergo fission by |
| A. | High energy (fast) neutrons alone |
| B. | Low energy (slow) neutrons alone |
| C. | Either fast or slow neutrons |
| D. | Medium energy neutrons |
| Answer» D. Medium energy neutrons | |
| 145. |
Artificial radioactive isotopes find application in |
| A. | Power generation |
| B. | Nucleonic devices |
| C. | Nuclear fission |
| D. | Medical field |
| Answer» E. | |
| 146. |
Which of the following type of pump is used in liquid metal cooled reactor for circulation of liquid metal |
| A. | Centrifugal |
| B. | Axial |
| C. | Reciprocation |
| D. | Electromagnetic |
| Answer» E. | |
| 147. |
The energy required to be applied to a radioactive nucleus for the emission of a neutron is |
| A. | 1 MeV |
| B. | 2.4 MeV |
| C. | 4.3 MeV |
| D. | 7.8 MeV |
| Answer» E. | |
| 148. |
In nuclear fission |
| A. | The original elements change into completely different elements |
| B. | The electrons of the element change |
| C. | The molecules rearrange themselves to form other molecules |
| D. | None of the above |
| Answer» B. The electrons of the element change | |
| 149. |
The total energy released in fission of U is |
| A. | 5 MeV |
| B. | 10 MeV |
| C. | 199 MeV |
| D. | 168 MeV |
| Answer» D. 168 MeV | |
| 150. |
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 |
| Answer» B. Accelerating fast neutrons | |