Steam Engines objective questions with answers part3

Q1. The fusible plug in small boilers is located
(A) in the drum
(B) in the fire tubes
(C) above steam dome
(D) over the combustion chamber

Q2. Fusible plug for boilers is made of fusible metal containing tin, lead, and
(A) bismuth
(B) copper
(C) aluminium
(D) nickel

Q3. Boiler H.P. is defined as the
(A) steam evaporation rate per kg of fuel fired
(B) work done in evaporating 1 kg of steam per hour from and at 100°C into dry saturated steam
(C) the evaporation of 15.65 kg of water per hour from and at 100°C into dry saturated steam
(D) work done by 1 kg of steam at saturation condition

Q4. In forced recirculation type boiler,
(A) heating takes place at bottom and the water supplied at bottom gets converted into the mixture of steam bubbles and hot water which rise to drum
(B) water is supplied in drum and through down-comers located in atmospheric condition it passes to the water wall and rises to drum in the form of mixture of water and steam
(C) feed pump is employed to supplement natural circulation in water wall type furnace
(D) water is converted into steam in one pass without any recirculation

Q5. The ratio of heat utilised to produce steam and the heat liberated in furnace is known as
(A) boiler effectiveness
(B) boiler evaporative capacity
(C) equivalent evaporation
(D) boiler efficiency

Q6. Steam in water tube boiler as compared to fire tube boiler
(A) can be raised rapidly
(B) is raisd at slower rate
(C) is raised at same rate
(D) could be raised at fast/slow rate depending on design

Q7. Thermal efficiency of well maintained boiler will be of the order
(A) 0.4
(B) 0.6
(C) 0.75
(D) 0.9

Q8. Thermal efficiency of a thermal power plant is of the order of
(A) 0.15
(B) 0.25
(C) 0.3
(D) 0.45

Q9. It is required to produce large amount of steam at low pressure. Which boiler should be used ?
(A) pulverised fuel fired boiler
(B) cochran boiler
(C) lancashire boiler
(D) babcock and wilcox boiler

Q10. Which type of boiler can meet rapid changes of load
(A) horizontal fire tube type
(B) horizontal water tube type
(C) vertical water tube type
(D) forced circulation type

Q11. 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

Q12. At very low temperature, the melting and boiling temperatures become equal. This temperature is
(A) 373°K
(B) 273.16°K
(C) 313°K
(D) 0°K.

Q13. The latent heat of steam at pressures greater than atmospheric in comparison to latent heat at atmospheric pressure is
(A) less
(B) more
(C) equal
(D) may be less or more depending on temperature

Q14. The saturation temperature of steam with increase in pressure increases
(A) linearly
(B) rapidly first and then slowly
(C) slowly first and then rapidly
(D) inversely

Q15. Carbonisation of coal is the process of
(A) pulverising coal in inert atmosphere
(B) heating wood in a limited supply of air at temperatures below 300°C
(C) strongly heating coal continuously for about 48 hours in the absence of air in a closed vessel
(D) enriching carbon in the coal.

Q16. pulverising coal in inert atmosphere
(A) heating wood in a limited supply of air at temperatures below 300GC
(B) strongly heating coal continuously for about 48 hours in the absence of air in a closed vessel
(C) enriching carbon in the coal.
(D) Heating of dry steam above saturation temperature is known as

Q17. enthalpy
(A) superheating
(B) latent heat
(C) super tempering.
(D) Superheating of steam is done at

Q18. constant volume
(A) constant temperature
(B) constant pressure
(C) constant entropy
(D) 1 kg.m is equal to

Q19. 9.81 Joules
(A) 512 Joules
(B) 427 Joules
(C) 112 Joules
(D) Equivalent evaporation is the amount of water evaporated in a boiler from and at

Q20. 0°C
(A) 100°C
(B) saturation temperature at given pressure
(C) room temperature
(D) The specific volume of steam with increase in pressure decreases