- (A) 1
- (B) 1.2 ,
- (C) 1.3
- (D) 1.4
- (E) 1.5
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- (A) These are used to dampen pulsations ,
- (B) These act as reservoir to- take care of sudden demands
- (C) These increase compressor efficiency
- (D) These knock out some oil and moisture
- (E) These reduce frequent on/off operation of compressors
- (A) it allows maximum compression to be achieved
- (B) it greatly affects volumetric efficiency
- (C) it results in minimum work
- (D) it permits isothermal compression
- (E) none of the above
- (A) compressor efficiency
- (B) isothermal efficiency
- (C) volumetric efficiency
- (D) mechanical efficiency
- (E) adiabatic efficiency
- (A) centrifugal compressor
- (B) axial compressor
- (C) pumps
- (D) all of the above
- (E) none of the above
- (A) Power consumption per unit of air delivered is low
- (B) Volumetric efficiency is high
- (C) It is best suited for compression ratios around 7:1
- (D) The moisture in air is condensed in the intercooler
- (E) Outlet temperature is reduced
- (A) from an air conditioned room maintained at 20°C
- (B) from outside atmosphere at 1°C
- (C) from coal yard side
- (D) from a side where cooling tower is located nearby
- (E) from any one of the above locations
- (A) increases with increase in compression ratio
- (B) decreases with increase in compression ratio
- (C) in not dependent upon compression ratio
- (D) may increase/decrease depending on compressor capacity
- (E) unpredictable
- (A) to accommedate Valves in the cylinder head
- (B) to provide cushioning effect
- (C) to attain high volumetric efficiency
- (D) to avoid mechanical bang of piston with cylinder head
- (E) to provide cushioning effect and also to avoid mechanical bang of piston with cylinder head
- (A) increases
- (B) decreases
- (C) remains same
- (D) increases/decreases depending on com-pressor capacity
- (E) unpredictable
