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.Management Sciences
Category: Steam Boilers, Engines, Nozzles and Turbines
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
The size of a boiler drum in pulverised fuel fired boiler,as its size and capacity, (steam pressure and flow ratings) increase __________________?
A. increases
B. decreases
C. remains unchanged
D. increases/decreases depending on steam temperature requirements
E. unpredictable
A packaged boiler is one in which various parts like firing equipment, fans, feed pumps and automatic controls are________________?
A. supplied by same manufacturer loose and assembled at site
B. supplied mounted on a single base
C. purchased from several parties and packed together at site
D. packaged boiler does not exist
E. none of the above
The specific volume of steam with increase in pressure decreases_____________________?
A. linearly
B. slowly first and then rapidly
C. rapidly first and then slowly
D. inversely
E. none of the above
The equivalent evaporation of a boiler is a measure to compare _________________?
A. the given boiler with the model
B. the two different boilers of the same make
C. two different makes of boilers operat¬ing under the same operating conditions
D. two boilers of same make but operaing under different conditions
E. any type of boilers operating under any conditions
The state of vapour under saturation condition is described by_______________?
A. pressure alone
B. temperature alone
C. pressure and temperature
D. pressure and dryness fraction
E. dryness fraction alone
Hard coke is used in________________?
A. cement industry
B. thermal power plant
C. blast furnace
D. domestic use
E. locomotives
Which of the following is a water tube boiler_________________?
A. locomotive boiler
B. Cochran boiler
C. Cornish boiler
D. Babcock and Wilcox boiler
E. Lancashire boiler
Primary air is the air used to__________________?
A. provide air around burners for obtaining optimum combustion
B. transport and dry the coal
C. convert CO (formed in lower zone of furnace) into C02 at higher zone
D. air-delivered by forced draft fan
E. none ot the above
Boiler stays are used to___________________?
A. prevent flat surfaces under pressure from tearing apart
B. take care of failure in shear
C. take care of failure in compression
D. provide support for boiler
E. provide foundation of boiler
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