Hello students welcome to msbte news in this article we have provided 22337 Thermal Engineering Mcq Questions and Answers Pdf. This Thermal Engineering 22337 Mcq Questions is ideal for Students who are in Second Year of Diploma in Mechanical Engineering courses. By referring Thermal Engineering Mcq Pdf you will get to know about the paper pattern of Msbte Mcq exams 2021.
with this Thermal Engineering Mcq Questions and Answers Diploma in Engineering 2nd year students can practice for their upcoming Winter 2021 exams. In this Thermal Engineering mcq Bank we have selected 25 important questions from previous year papers. you can also download Thermal Engineering Mcq Questions Pdf below we have given a download link.
Table of Contents
22337 Thermal Engineering Mcq Questions and Answers
1. For water, at pressures below atmospheric,
(a) melting point rises slightly and boiling point drops markedly
(b) melting point rises markedly and boiling point drops markedly
(c) melting point drops slightly and boiling point drops markedly
(d) melting point drops slightly and boiling point drops slightly
Correct!
Wrong!
2. At very low temperatures, the melting and boiling temperatures become equal. This temperature is
(a) 373°K
(b) 273.16°K
(c) 303°K
(d) 0°K.
Correct!
Wrong!
3. The critical pressure at which latent heat of vaporisation is zero is
(a) 225.65 kgf/cm2
(b) 273 kgf/cm2
(c) 100 kgf/cm2
(d) 1 kgf/cm2
Correct!
Wrong!
4. Equivalent evaporation of water is the evaporation “for a feed water supply at 100°C
(a) and its corresponding conversion into dry saturated steam at 100°C and 1.033 kg/cm2
(b) and its corresponding conversion into dry steam at desired boiler pressure
(c) conversion into steam at atmospheric condition
(d) conversion into steam at the same pres-sure at which feed water is supplied
Correct!
Wrong!
5. Cochran boiler is a
(a) horizontal fire-tube boiler
(b) horizontal water-tube boiler
(c) vertical water-tube boiler
(d) vertical fire tube boiler
Correct!
Wrong!
6. Lancashire ‘boiler is a
(a) stationary fire tube boiler
(b) stationary water tube boiler
(c) water tube boiler with natural/forced circulation
(d) mobile fire tube boiler
Correct!
Wrong!
7. Steam nozzle convertsÂ
(a) heat energy of steam into pressure energy
(b) heat energy of steam into kinetic energy
(c) pressure energy of steam into heat energy
(d) pressure energy of steam into potential energy
Correct!
Wrong!
8. A nozzle is designed for
(a) maximum pressure at the outlet
(b) maximum discharge
(c) maximum pressure and maximum discharge
(d) maximum kinetic energy at the outlet
Correct!
Wrong!
9. Ideal expansion of steam through a nozzle is considered
(a) isothermal
(b) adiabatic
(c) polytropic
(d) none of the above
Correct!
Wrong!
10. The presence of friction in the nozzle
(a) increases the final dryness fraction of steam
(b) decreases the final dryness fraction of steam
(c) it does not affect the dryness fraction of steam
(d) none of the above
Correct!
Wrong!
11. The condensation of steam in a condenser takes place at
(a) constant pressure
(b) constant temperature
(c) constant pressure and constant temperature
(d) none of the above
Correct!
Wrong!
12. During condensation process, the temperature of the condensing fluid
(a) remains constant
(b) decreases
(c) increases
(d) none of the above
Correct!
Wrong!
 13. Air leakage into the condenser reduces
(a) turbine output
(b) cooling capacity
(c) life of condenser
(d) all of the above
Correct!
Wrong!
14. What is the correct formula for net work done of reciprocating engine?
a. Wnet = mean effective pressure × clearance volume
b. Wnet = mean effective pressure × total volume of cylinder
c. Wnet = mean effective pressure × displacement volume
d. none of the above
Correct!
Wrong!
15. Minimum work in compressor is possible when the value of adiabatic index n is equal to
(a) 0.75
(b) 1
(c) 1.27
(d) 1.35
Correct!
Wrong!
16. Compressed air coming out from a punctured football
(a) becomes hotter
(b) becomes cooler
(c) remains at the same temperature
(d) may become hotter or cooler depending upon the humidity of the surrounding air
Correct!
Wrong!
17. The compressor capacity with decrease in suction temperature
(a) increases
(b) decreases
(c) remains unaffected
(d) may increase or decrease depending on compressor capacity
Correct!
Wrong!
18. Unit of thermal conductivity in S.I. units is
(a) J/m2 sec
(b) J/m °K
(c) W/m °K
(d) (b) and (c)
Correct!
Wrong!
19. Thermal conductivity of solid metals with rise in temperature normallyÂ
(a) increases
(b) decreases
(c) remains constant
(d) may increase or decrease depending on temperature
Correct!
Wrong!
20. Which of the following is the case of heat transfer by radiation
(a) blast furnace
(b) heating of building
(c) cooling of parts in furnace
(d) all of the above.
Correct!
Wrong!
21. In a high-level jet condenser, the condenser shell is installed at a height of
(a) more than 5.5 m
(b) more than 10.33 m
(c) less than 10.33 m
(d) none of the above
Correct!
Wrong!
22. The surface condensers are preferred in steam power plant, because
(a) they require less coolant
(b) condensate can be reused
(c) they are more efficient
(d) none of the above
Correct!
Wrong!
23. The vacuum maintained in a condenser depends on
(a) pressure of cooling water
(b) temperature of cooling water
(c) back pressure maintained in the condenser
(d) all of the above
Correct!
Wrong!
24. The capacity of a compressor is 5 m /min. 5 m /min refers to
(a) standard air
(b) free air
(c) compressed air
(d) compressed air at delivery pressure
Correct!
Wrong!
25. The overall isothermal efficiency of compressor is defined as the ratio of
(a) isothermal h.p. to the BHP of motor
(b) isothermal h.p. to adiabatic h.p.
(c) power to drive the compressor to isothermal h.p.
(d) work to compress air isothermally to work for actual compression
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