1. Main objective of boiler trial is ?
a) To determine the generating capacity of the boiler
b) To determine the thermal efficiency of the boiler, when working at a definite pressure
c) To prepare heat balance sheet for the boiler
d) All of the above
Ans. d
2. Device used to put off fire in the furnace of the boiler, when the level of water in the boiler falls to an unsafe limit, is ?
a) Safety valve
b) Fusible plug
c) Blow off cock
d) Stop valve
Ans. b
3. The shell of the cochran boiler is made hemispherical ?
a) To provide maximum strength and space
b) To withstand high pressure inside
c) Both ( a ) and ( b )
d) None of these
Ans. c
4. The dryness fraction of steam within a turbine is not allowed to fall below ?
a) 0.5
b) 0.9
c) 0.95
d) 0.99
Ans. b
5. With increase in pressure ?
a) Enthalpy of dry saturated steam increase
b) Enthalpy of dry saturated steam remains same
c) Enthalpy of dry saturated steam decreases
d) Enthalpy of dry saturated steam first increase and then decrease
Ans. b
6. An analysis which includes the steam in the exhaust is called ?
a) Dry analysis
b) Wet analysis
c) Dry and Wet analysis
d) None of the above
Ans. b
7. Rankine cycle efficiency of a good steam power plant may be in the range of ?
a) 35-45%
b) 85-95%
c) 15-25%
d) 70-80%
Ans. a
8. Bending moment M and torque T is applied on a solid circular shaft. If the maximum bending moment stress equals to maximum shear stress developed, then M is equal to ?
a) T/2
b) T
c) 2T
d) 4T
Ans. a
9. A shaft was initially subjected to a bending moment and then subjected to torsion if the magnitude of bending moment is found to be the same as that of the torque, then the ratio of maximum bending stress to shear stress would be ?
a) 0.25
b) 0.5
c) 2.0
d) 4.0
Ans. c
10. For forced draught system, the function of chimney is mainly ?
a) To provide draught to accelerate the combustion of fuel
b) To discharge gases high up in the atmosphere to avoid environmental hazard
c) To reduce the temperature of hot gases discharged
Ans. b
Boiler Objectives Questions :
BOE (Boiler Operation Engineer) Previous Year Exam Questions And Answers Set - 18
Boiler Operation Engineer (BOE) Previous Year Exam Questions And Answers Set - 19
Boiler Operation (BOE) Previous Year Multiple Choice Questions With Answer Set - 20
Boiler Operation Engineer (BOE) Previous Year Questions With Answer - 21
Boiler Interview Questions :
What are the factors which affect the Natural circulation ?
What is the difference between Tower type and Two pass conventional boiler?
What parameters are measured during Boiler PG test ?
Why the start up vent is used in Boilers?
List out the potential reasons for boiler tubes failure ?
What is cold end corrosion in boiler and When it occurs ?
What is the circulation number in boiler ?
Most Important Steam Blowing Questions Asked In Central BOE Interview
How it is been decided that RHS or LHS safety valve of steam drum is set at higher pressure ?
Why economiser is kept at the top of the boiler ?
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