Thermal efficiency of well maintained boiler will be of the order___________________?
(A) 20%
(B) 40%
(C) 50%
(D) 75%
(D) 90%
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) factor of evaporation
(D) equivalent evaporation
(D) boiler efficiency
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
(D) heat consumed in evaporating 1 kg water at 0°C to steam at 100°C and 1.033 kg/cm pressure
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
(D) at the inlet of chimney
The number of drums in Benson steam generator is_________________?
(A) one
(B) two
(C) one steam drum and one water drum
(D) no drum
(D) none of the above
If a steam sample is nearly in dry condition, then its dryness fraction can be most accurately determined by___________________?
(A) throttling calorimeter
(B) separating calorimeter
(C) combined separating and throttling calorimeter
(D) bucket calorimeter
(D) none of the above
On Mollier chart, flow through turbine is represented by ________________?
(A) horizontal straight line
(B) vertical straight line
(C) straight inclined line
(D) curved line
(D) none of the above
With increase in load, radiant super heater has____________________?
(A) drooping characteristic
(B) lihear characterisstic
(C) rising characteristic
(D) flat characteristic
(D) none of the above
The major axis of elliptical manholes on the shell should be provided___________________?
(A) longitudinally
(B) circumferentially
(C) on dished end
(D) anywhere
(D) vertically
Size of boiler tubes is specified by___________________?
(A) mean diameter and thickness
(B) inside diameter and thickness
(C) outside diameter and thickness
(D) outside diameter and inside diameter
(D) outside diameter alone