Turbidity in boiler feed water causes
A.Sludge
B.Embrittlement
C.Corrosion
D.Scale
E.None of the above
Category: Heat Engines Mcqs
Samples of exhaust gases from following engines have been collected:
A.Petrol engine
B.Diesel engine
C.Gas engine
D.Jet propulsion unit
A perfect heat engine works on the Carnot cycle between 1000?C and 200?C. The efficiency of the engine will be
A.80%
B.60%
C.42.80%
D.37.20%
E.62.80%
Steam trap is a device that
A.Allows passage of water but prevents the passage of steam
B.Allows passage of air but prevents passage of steam
C.Allows passage of the flue gases but prevents flow of steam
D.None of the above
A wankel engine is
A.Rotory engine
B.Reciprocating engine
C.Hybrid engine
D.Turbine engine
E.Jet engine
Rank of coal is based on
A.Fixed carbon and heating value
B.Ash content
C.Ash and moisture content
D.Size
E.None of the above
For combustion of one kg of carbon the quantity of oxygen required (air contains 23% by wight of oxygen) is
A.2.62 kg
B.3.67 kg
C.8 kg
D.11.6 kg
E.12 kg
In power station practice ‘spinning reserve’ is
A.Reserve generating capacity that is in operation but in service
B.Reserve generating capacity that is connected to bus and ready to take load
C.Reserve generating capacity that is available for service but not in operation
D.Capacity of the part of plant that remains under maintenance
If an air cooled compressor gets over-heated during operation, the probable cause cannot be
A.Intake fliter clogged
B.Insufficient lubricating oil
C.Valve strips broken
D.Leadage in intercooler
E.Direction of rotation wrong
