TE-II 2ND

What type of motion does the piston follow in a reciprocating compressor?

• Circular motion

• Rotational motion

• Reciprocating (back-and-forth) motion

• Oscillatory motion

What is the function of the suction valve in a reciprocating compressor?

• Allows compressed air to exit the cylinder
  

• Prevents leakage of lubricating oil

• Allows air to enter the cylinder during the suction stroke

• Controls the speed of the compressor

In a double-acting reciprocating compressor, compression occurs

• Only on the forward stroke

• Only on the return stroke

• On both forward and return stroke

• Only in the crankshaft

On a T-S diagram, the entropy of air remains constant during which of the following processes in a reciprocating compressor?

• Isothermal compression

• Polytropic compression

• Adiabatic (isentropic) compression

• Isobaric expansion

In a reciprocating compressor, the effect of an intercooler on the P-V diagram is to

• Increase the area enclosed by the cycle

• Make compression closer to isothermal

• Shift the diagram to higher pressures

• Reduce the clearance volume

What is the primary reason for using a double-stage compressor instead of a single-stage compressor?

• To reduce clearance volume

• To improve volumetric efficiency

• To reduce work input and improve efficiency

• To increase the compression ratio

In a double-stage reciprocating compressor, the second stage handles

• The same pressure as the first stage

• Higher pressure than the first stage

• Lower pressure than the first stage

• The same pressure as atmospheric air

Which of the following applications commonly use reciprocating compressors?

• Air brakes in locomotives

• Oxygen compression in hospitals

• Pneumatic tools in workshops

• All of the above

The brake power (BP) of a reciprocating compressor is

• Always greater than the indicated power

• Always equal to the indicated power

• Always less than the indicated power

• Independent of the indicated power

In a reciprocating compressor, the power requirement increases if

• The pressure ratio decreases

• The clearance volume decreases

• The compression ratio increases

• The number of cylinders decreases