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.Management Sciences
Category: Steam Boilers, Engines, Nozzles and Turbines
Mechanical equivalent of heat for 1 kcal or Joule’s equivalent is equal to_________________?
A. 421 kgm
B. 421 kgm
C. 539 kgm
D. 102 kgm
E. 75 kgm
The safety valve at superheater as compared to drum safety valve setting is set at___________________?
A. higher value
B. lower value
C. same value
D. any value
E. none of the above
Feed water conditioning in thermal power plants in done to__________________?
A. reduce hardness and for removal of solids
B. increase efficiency-of thermal power plant
C. increase *heat transfer rate
D. increase steam parameters
E. all of the above
Incomplete combustion can be best judged by__________________?
A. smoky chimney exit
B. excess air in flue gases
C. measuring carbon mono-oxide in flue gases
D. measuring temperature of flue gases at exit of furnace
E. measuring oxygen in flue gases
Vacuum for reciprocating steam engines compared to steam turbines is__________________?
A. more
B. equal
C. less
D. could be more or less depending on the size of plant
E. none of the above
The condition of steam in boiler drum is always ___________________?
A. dry
B. wet
C. saturated
D. supersaturated
E. superheated
In a throttling process________________?
A. steam temperature remaisn constant
B. steam pressure remains constant
C. steam enthalpy remains constant
D. steam entropy remains constant
E. steam volume remains constant
Duplex feed pumps are used in small steam boilers. These operate on the principle of_________________?
A. centrifugal pump
B. axial flow pump
C. gear pump
D. ejector pump
E. reciprocating pump
The proximate analysis of fuel lists__________________?
A. various chemical constituents, carbon, hydrogen, oxygen etc, plus ash as per-cents by volume
B. various chemical constituents, carbon, hydrogen, oxygen, etc, plus ash as per-cents by weight
C. fuel constituents as percents by volume of moisture, volatile, fixed carbon and ash
D. fuel constituents as percents by weight of moisture, volatile, fixed carbon and ash
E. moisture and ash free heating value
Lancashire boiler is of____________________?
A. stationary<fire tube-type
B. horizontal type
C. natural cirulation type
D. internally fired type
E. all of the above
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