171. Which of the following is correct ? (where pa = Actual mean effective pressure, pm = Theoretical mean effective pressure, and K = Diagram factor)
pa = pm/K
pa = pm x K
pa = K/pm
pa = pm + K
✅ The correct answer is option B.
Steam Boilers and Engines MCQs
173. The amount of water evaporated or steam produced in kg per kg of fuel burnt is termed as evaporative capacity of a boiler.
Agree
Disagree
✅ The correct answer is option A.
174. A water level indicator is a device to indicate the exact water level in the boiler at any instant.
TRUE
FALSE
✅ The correct answer is option A.
175. The water tube boilers produce steam at a __________ pressure than that of fire tube boilers.
lower
higher
✅ The correct answer is option B.
176. Lancashire boiler is
stationary fire tube boiler
internally fired boiler
horizontal boiler
all of these
✅ The correct answer is option D.
177. In fire tube boilers
water passes through the tubes which are surrounded by flames and hot gases
the flames and hot gases pass through the tubes which are surrounded by water
forced circulation takes place
none of these
✅ The correct answer is option B.
178. The function of a piston in a steam engine is
to guide motion of the piston rod and to prevent it from bending
to transfer motion from the piston to the cross-head
to convert heat energy of the steam into mechanical work id) to exhaust steam from the cylinder at proper moment
✅ The correct answer is option C.
179. The heat balance sheet for the boiler shows the
complete account of heat supplied by 1 kg of dry fuel and the heat consumed
moisture present in the fuel
steam formed by combustion of hygrogen per kg of fuel
all of the above
✅ The correct answer is option A.
180. The amount of water evaporated from feed water at __________ into dry and saturated steam at 100° C at normal atmospheric pressure is called equivalent evaporation from and at 100° C.
0°C
40°C
60°C
100°C
✅ The correct answer is option D.