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.Management Sciences
Category: Steam Boilers, Engines, Nozzles and Turbines
1 kg.m is equal to_________________?
A. 9.81 Joules
B. All Joules
C. 427 Joules
D. 102 Joules
E. 539 Joules
Steam exhaust from high pressure turbine is reheated in _____________________?
A. boiler drum
B. superheater tubes
C. economiser
D. a separate coil
E. a separate coil located in convection path
Boiler parameters are expressed by ___________________?
A. tonnes/hr. of steam
B. pressure of steam in kg/cm2
C. temperature of steam in °C
D. all of the above
E. none of the above
In natural circulation type boiler _______________?
A. heating takes place at bottom and the water supplied at bottom gets converted into the mixture of steam bubbles and hot water which rise to drum
B. water is supplied in durm and through down-comers located in atmospheric conditon it passes to the water wall and rises to drum in the form of mixture of water and steam
C. feed pump is employed to supplement natural circulation in water wall type furnace
D. water is converted into steam in one . pass without any recirculation
E. water is fed at atmospheric pressure
A safety valve in a locomotive starts leaking. The leaking medium will be_________________?
A. water
B. dry steam
C. wet steam
D. super heated steam
E. supersaturated steam
Water boils when its vapour pressure ___________________?
A. equals that of the surroundings
B. equals 760 mm of mercury
C. equals to atmospheric pressure
D. equals the pressure of water in the container
E. boiling has ^nothing to do with vapour pressure
The diameter of fire tube of Cornish boiler compared to its shell is__________________?
A. one half
B. one third
C. one-fifth
D. two-fifth
E. three-fifth
Fusible plug for boilers is made of fusible metal containing tin, lead, and___________________?
A. bismuth
B. copper
C. aluminium
D. nickel
E. iron
Locomotive type’ boiler is__________________?
A. horizontal multitubular water tube boiler
B. water wall enclosed furnace type
C. vertical tubular fire tube type
D. horizontal multi-tubular fire tube type
E. none of the above types
The diameter of fire tubes in Cochran boiler is of the order of___________________?
A. 2 cm
B. 6 Cm ,
C. 8 cm
D. 12 cm
E. 15 cm
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