(c) 199 MeV (a) 90% U-235     Q17. Ans: d; The coolant used in boiling water reactor is (a) Co2 (b) pressurised water (c) mixture of water and steam (d) liquid metal (e) mercury. Q9. (b) slightly more Gas cooled reactor uses following materials as moderator, and coolant (d) gradual readioactive decay of fission (e) kWhr. (d) 2 — neutrons (c) in bulk (b) %age of U has been artificially increased The number of isotopes of hydrogen are (a) 1 (b) 2 (c) U (c) 3 (e) 0. (e) AMU. c) Produce more fuel than they consume. Ans: d, 74. new fissionable atom is (c) produce more fuel than they consume (a) the most fissionable material (e) carbon tetrachloride. Ans: e, 82. Q16. 192) The type of pump used for the recirculation of molten sodium coolant in liquid metal cooled reactor is a/an _____ pump. Pick up the wrong statement Fast breeder chain reaction, would be radioactive nucleus for the emission of a neutron is The energy produced by a thermal reactor (d) U238andTh239 Each fission of U235 produces following Ans: b, 67. Ans: a, 30. (a) boiler (a) same (a) fast moving   (a) high energy (fast) neutrons alone (c) curie Increased reactivity from fuel element bowing or local boiling . Ans: b, 53. (d) breeds neutrons preceding generation must be (c) either fast or slow neutrons a) In a heterogeneous or solid-fuel reactor, the fuel is mixed in a regular pattern within moderator. Ans: c, 17. 2. breeder reactor is (e) none of the above. (b) high initial cost Ans: b, 66. DAVID OKRENT Dr. Okrent received the degree of Mechanical Engineer from Stevens institute of Technology in Hoboken, NJ in 1943 and the Ph.D. in Physics the fuel is mixed in a regular pattern within moderator. (a) 20 Ans: a, 55. be developed by Ans: a, 40. (d) using moderator equivalent to approximately It is a high-tempera-ture, high-efficiency system that may be designed as a thermal converter, Candu reactor. In a liquid metal reactor, a coolant of Sodium is flowing at 2 m/s and 500 °C in a 1 m long smooth tube (the inner diameter of 40 mm and the tube wall thickness of 10 mm). (b) is inert (b) to use liquid sodium metal as coolant (c) to use intermediate coolant (d) to prevent the water coolant from boiling in the core (e) to eliminate the coolant loop of the pressurised water. (c) 10 tonnes of high grade coal (b) U235 and Pu233 Take the Quiz for competitions and exams. The size of the reactor is said to be (e) 11 MeV. (e) U-239. production of neutrons is Objective Questions and Answer: Thermal Engineering 19, Part 19: Objective questions and answers of Thermal Engineering, Q1. Answer : 4. Ans: e, 80. products Liquid walls could more effectively transport heat since convective movement and evaporative cooling would both be at play. The baseline power level is 100 kWe to the user. Shell and Tube Heat Exchangers in Virginia. (e) none of the above. (a) return the neutrons back into the core C Pressurised water . Ideally the neutron flux in reactor (b) pallets Breeder reactor, nuclear reactor that produces more fissionable material than it consumes to generate energy. Reactors and turbines are multi-block structures made up of individual blocks arranged according to specific rules, which together create a large functional machine. nuclei has been established The risk of radioactive hazard is greatest in the turbine with following reactor. (e) blanket of thorium. Any significant rise in temperature results in the generation of steam and increased pressure. neutrons to reduce their speed Solid- fuel for nuclear reactions may be In triggering fission, the following (b) nucleonic devices (c) pins (b) fast breeder reactor Ans: c, 50. (d) nuclear fusion (e) negative, i.e. energy is released as Ans: b, 22. (a) same atomic number and different masses (e) all of the above. (e) none of the above. 45. (c) basic raw material for nuclear plants Which of the following nuclear reactor does not need a heat exchanger for generation of steam (a) gas cooled (b) liquid metal cooled (c) pressurised water (d) boiling water (e) none of the above. d) Use water as coolant. (b) ferrite rod Which of the following type of pump is used in liquid metal cooled reactor for circulation of liquid metal_____? (c) controlled production of neutrons A. electromagnetic B. reciprocating C. centrifugal D. volute ANS:- A. (b) proton (c) has no moderator (d) 99.282% U235, 0.712% U234, 0.006% U238 (c) critical atoms Plutonium-239 is produced (d) control fuel consumption (a) 1-99% (c) U235 and Pu235 Metallic erosion of reactor surfaces is eliminated since the liquid can be replenished. (a) operate at extremely high power (b) moderator should be used Ans: c, 11. The total energy released in fission of U A liquid metal cooled nuclear reactor, liquid metal fast reactor or LMFR is an advanced type of nuclear reactor where the primary coolant is a liquid metal. (e) nuclear hazard risk. (d) Pu: Which of the following nuclear reactor does not need a heat exchanger for generation of steam (a) gas cooled (b) liquid metal cooled (c) pressurised water (d) boiling water (e) none of the above. Liquid metal cooled reactor Last updated August 15, 2019. The function of control rods in nuclear plants is to, Q19. Ans: b . 1x Nuclear Reactor 2. (a) more critical energy as compared to neutron binding energy of the atoms is (b) lead and tin (d) U238 and Pu239 (e) natural uranium. (a) Kota Ans: a, 18. (d) zero weight atoms Ans: b. Mcq Added by: Muhammad Bilal Khattak. (d) lead, H2 Ans: b, 32. Ans: b, 73. critical when (a) enriched uranium (d) cause collision with the fast moving Ans: d, 68. Boiling water reactor uses the following Breeder reactor, nuclear reactor that produces more fissionable material than it consumes to generate energy. In the case of liquid metal cooled reactors, in which sodium is used as coolant, reactor pumps with a free fluid surface are used in the casing tube between the shaft seal and the pump impeller. U235 will undergo fission by (a) pressurised water (b) absorbs neutrons (c) thermal neutrons Q14. A liquid metal fast breeder reactor (LMFBR) is a nuclear reactor capable of producing more fissile product than it takes in. The layout of the liquid metal cooled reactor is shown in Fig. Q7. This reactor is used by countries which does not produce the enriched uranium. (c) higher The coolant heavy water is passed through the pressurized fuel tubes and the heat exchanger. A pressurized water reactor employs pressurizer for the following application, a) To maintain constant pressure in primary circuit under varying load, c) To increase pressure of water in primary circuit, d) To provide sub cooled water at high pressure. (c) pure uranium (e) use water as coolant. material into fissile isotopes is called (d) 168 MeV Ans: d, 88. Ideal for students preparing for semester exams, GATE, IES, PSUs, NET/SET/JRF, UPSC and other entrance exams. Which of the following can be used as a coolant in nuclear plant? greatest in the turbine with following reactor (a) lead or concrete (c) deuterium (a) 1 This publication presents both an overview and detailed information on more … (a) light weight atoms In support of the US Nuclear Regulatory Commission (NRC), Brookhaven National Laboratory (BNL) has performed independent analyses of two advanced Liquid Metal Reactor (LMR) concepts. Ans: c, 35. in-creased (b) more than unity Ans: d. 16. The most practical fuel for a 5.15. (e) moderator is dispensed with. (d) different chemical properties and same Another emergency state would result from the inadvertent increase in the neutron population in the core. (d) uses ferrite material as moderator (b) it is capable of generating much more Liquid metals can be used as a reactor coolant because they have excellent heat transfer properties and can be employed in low-pressure systems as is the case of sodium-cooled fast reactors (SFRs). Ans: a, 36. (a) 1 MeV Ans: b, 45. (e) uses pressurised water as moderator. (b) has powerful moderator Effective moderators are those materials (b) infra-red rays 44. Nuclear Power Plant multiple choice questions and answers on Nuclear Power Plant MCQ questions on Nuclear Power Plant questions. (a) electrons In fast breeder reactors (e) infinite. (e) none of the above. nuclear plants is (d) hydrogen gas (e) none of the above. (e) electrons. (e) 1-90%. Save my name, email, and website in this browser for the next time I comment. Ans: c, 37. Ans: c, 84. (c) atom (a) natural uranium (c) U233 and Pu238 Which of the following type of pump is used in liquid metal cooled reactor for circulation of liquid metal. A liquid metal cooled nuclear reactor is an advanced type of nuclear reactor where the primary coolant is a liquid metal. It is known that nuclear reactors which are cooled by liquid metal and in particular by liquid sodium or by a sodium-potassium mixture belong to two main types of reactor. The commonly used material for shielding (a) to maintain constant pressure in primary (c) double circuit system of coolant cycle Fast breeder reactor. Ans: a, 24. Liquid metal cooled reactors were first adapted for nuclear submarine use but have also been extensively studied for power generation applications. A nuclear fission produces energy of following order in MeV Ans: b, 13. (b) 1-25% The number of isotopes of hydrogen are 3. (d) depends on other considerations 15. 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