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Steam Boilers - Interview Questions and Answers

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161. One kilowatt-hour energy is equivalent to
A. 1000 J
B. 360 kJ
C. 3600 kJ
D. 3600 kW/sec
E. 1000 kJ.
Explanation:
162. The crown of the fire box is made hemispherical in order to
A. give maximum space
B. give maximum strength
C. withstand pressure inside boiler ,
D. resist intense heat in fire box
E. enable easy,manufacture.
Explanation:
163. The diameters of fire tubes and superheaer tubes in locomotive boiler are
A. 47.5 mm, 130 mm
B. 32.5 mm, 180 mm
C. 65.5 mm, 210 mm
D. 24.5 mm, 65 mm
E. opt 5
Explanation:
164. In locomotive boiler, maximum steam pressure is limited to
A. 1 kg/cm2
B. 5 kg/cm2
C. 10 kg/cm2
D. 18 kg/cm2
E. 31 kg/cm2.
Explanation:
165. Hard coke is produced by carborisation of coal at
A. atmospheric temperature
B. 500-600�C
C. 70O-850�C
D. 95O-1100�C
E. 120O-1500�C.
Explanation:
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