Related Questions

Which of the following varieties of coals is mostly used in steam boilers?
A Non-coking bituminous coal
B Brown coal
C Peat
D None of the above
Very high pressure boilers are usually __________ boilers.
A Fire tube
B Water tube
C Waste heat
D Natural circulation
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 Reciprocating pump
Feed check valve is used in steam boilers to
A Check the water level in the boiler
B Check the feed water flow rate
C Feed high pressure water to boiler and guard against its backflow through it
D None of these
A steam turbine, in which a part of the steam after partial expansion, is used for process heating and the remaining steam is further expanded for power generation, is known as
A Back pressure turbine
B Pass out turbine
C Low pressure turbine
D Impulse turbine
In forced circulation steam boilers, the force is applied
A To draw water
B To circulate water
C To drain off the water
D All of these
In which of the following boilers, the draught in furnace is increased by utilising exhaust steam from engine
A Lancashire boiler
B Locomotive boiler
C Babcock and Wilcox boiler
D Benson boiler
In a steam engine, superheated steam from the boiler is fed into the steam chest at a pressure of
A 10 atmospheres
B 20 atmospheres
C 30 atmospheres
D 40 atmospheres
Steam reforming of naphtha is a source of hydrogen production for nitrogeneous fertiliser industry. What is the usual ratio of steam to carbon maintained in the process of steam reforming of naphtha?
A 1.5:1
B 3.5:1
C 10:1
D 15:1
Gasification of the solid fuel converts its organic part into combustible by interaction with air/oxygen and steam so as to obtain a secondary gaseous fuel of high calorific value having no ash. Gasification reactions are normally carried out at about __________ °C.
A 400-500
B 900-1000
C 1400-1500
D 1700-1800

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