mechanical engineering MCQs – Page 126

Practise multiple-choice questions from mechanical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

mechanical engineering Mcqs

1. compressors gas turbines and jet engines 2. theory of machines 3. nuclear power plants 4. engineering materials 5. strength of materials mechanical engineering 6. thermodynamics 7. heat transfer 8. i c engines 9. steam boilers engines nozzles and turbines 10. engineering mechanics 11. fluid mechanics mechanical engineering 12. production technology 13. machine design 14. hydraulic machines 15. workshop technology 16. refrigeration and air conditioning

2501. The energy required to be applied to a radioactive nucleus for the emission of a neutron is________________?
0

A. 1 MeV

B. 4.3 MeV

C. 20 MeV

D. 7.8 MeV

E. 2.4 MeV

2502. Which of the following are ferrite materials__________________?
0

A. U233andPu239

B. U

C. U238andTh239

D. none of the above

E. U238andPu239

2503. Ideally the neutron flux in reactor should be__________________ ?
0

A. uniform throughout

B. maximum in center and zero at side

C. maximum at side and zero in center

D. zero throughout

E. none of the above

2504. The nuclear power plant at Tarapur has the following reactor________________?
0

A. pressurised water

B. fast breeder

C. sodium graphite

D. none of the above

E. boiling water

2505. U235 will undergo fission by__________________?
0

A. either fast or slow neutrons

B. low energy (slow) neutrons alone

C. high energy (fast) neutrons alone

D. none of the above

E. medium energy neutrons

2506. Half life of a radioactive isotope corresponds to the time required for half of the following to decay__________________?
0

A. protons

B. electrons

C. neutrons

D. nulceus

E. atom

2507. A fission chain reaction in uranium can be developed by________________?
0

A. using moderator

B. absorbing all neutrons

C. slowing down fast neutrons so that Uz fission continues by slow motion neutrons

D. accelerating fast neutrons

E. enriching U235

2508. Plutonium is produced________________?
0

A. by neutron irradiation of Uz

B. in high capacity furnace

C. as basic raw material

D. by neutron irradiation of throium

E. artificially

2509. A fast breeder reactor uses following as fuel_________________?
0

A. natrual uranium

B. enriched uranium

C. U235

D. plutonium

E. thorium

2510. Uranium-233 is produced__________________?
0

A. by neutron irradiation of Uz

B. by neutron irradiation of thorium

C. as basic raw material

D. in high capacity furnaces

E. artificially

2511. In order to have constant clain reaction to produce a constant rate of heat output, the value of ratio of the number of neutrons in one generation to the number of neutrons in the immediately preceding generation must be________________?
0

A. less than 1.0

B. greater than 1.0

C. equal to zero

D. equal to 1.0

E. equal to infinity

2512. A fast breeder reactor__________________?
0

A. uses graphite rods as moderator

B. uses ferrite material as moderator

C. has no moderator

D. has powerful moderator

E. uses pressurised water as moderator

2513. In triggering fission, the following types of neutrons are desirable_________________?
0

A. fast moving

B. neutrons at rest

C. slow moving

D. critical neutrons

E. none of the above

2514. The presence of reflector in nuclear power plants results in___________________?
0

A. increased production of neutrons

B. controlled production of neutrons

C. complete absorption of neutrons

D. decrease of speed of neutrons

E. decreased leakage of neutrons

2515. The risk of radioactive hazard is greatest in the turbine with following reactor___________________?
0

A. all of the above.

B. boiling water

C. liquid metal cooled

D. gas cooled

E. pressurised water

2516. Which of the following can be used as a coolant in nuclear plant________________?
0

A. light or heavy water

B. carbon tetrachloride

C. freon

D. carbon dioxide

E. molten lead

2517. In the breeder reactors the generation of new fissionable atom is_________________?
0

A. at a higher rate than the constuption

B. unpredictable

C. at the lower rate than the consumption

D. depends on other considerations

E. at an equal rate of the consumption

2518. The function of control rods in nuclear plants is to__________________?
0

A. control absorption of neutron

B. readioactive pollution

C. none of the above

D. control temperature

E. control fuel consumption

2519. The fuel needed, with reflector in nuclear power plant, in order to generate sufficient neutrons to sustain a chain reaction, would be________________?
0

A. less

B. zero

C. more

D. same

E. negative, i.e. fuel would be generated

2520. Supertheated steam is generated in following reactor________________?
0

A. all of the above

B. gas cooled

C. boiling water

D. pressurised water

E. none of the above

Previous Next

Showing 2501 to 2520 of 4266 mcqs