In locomotive boiler, maximum steam pressure is limited to_______________?
(A) 1 kg/cm2
(B) 5 kg/cm2
(C) 10 kg/cm2
(D) 18 kg/cm2
(D) 31 kg/cm2
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
(D) water is fed at atmospheric pressure
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
(D) reciprocating pump
The diameter of internal flue tubes in a Lancashire boiler compared to its shell is_________________?
(A) one-half
(B) one-third
(C) one-fourth
(D) one-fifth
(D) two-fifth
Which of the following is steam dbal?
(A) non-coking bituminous coal
(B) brown coal
(C) pulverised coal
(D) coking bituminous coal
(D) none of the above
The high pressure boiler is oiie producing steam at a pressure more than_________________?
(A) atmospheric pressure
(B) 5 kg/cm2
(C) 10 kg/cm2
(D) 40 kg/cm2
(D) 75-80 kg/cm2
The biggest size of thermal power unit operating in India is ________________?
(A) 30 MW
(B) 60 MW
(C) 100 MW
(D) 210 MW
(D) 500 MW
The diameter of cylindrical shell of the Lancashire boiler is of the order of__________________?
(A) 1 tp 1.25m
(B) 1 to 1.75 m
(C) 2 to 4 m
(D) 1.75 to 2.75 m
(D) 2.25 to 4.5 m
The function of injector used in small steam plants is to________________?
(A) create vacuum in furnace
(B) create vacuum at turbine exhaust
(C) pump feed water
(D) dose chemicals in feed water
(D) control steam temperature by injecting water
The diameter of tubes for natural circulation boiler as compared to controlled circulation boilers is___________________?
(A) more
(B) less
(C) same
(D) could be more or less depending on other factors
(D) none of the above