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WorksheetsTE-II 2ND
Total questions: 15
Worksheet time: 11mins
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
In a single-stage reciprocating compressor without clearance, the volumetric efficiency is
100%
Less than 100%
Greater than 100%
Zero
The compression process in a single-stage reciprocating compressor without clearance follows which path on a PV diagram?
Vertical line
Horizontal line
Polytropic curve
Straight inclined line
If a single-stage reciprocating compressor has a pressure ratio of 10 and an initial pressure of 1 bar, what is the final pressure?
5 bar
10 bar
15 bar
20 bar
The pressure ratio of a reciprocating compressor affects
The temperature rise during compression
The volumetric efficiency
The work input
All of the above
If the pressure ratio is 1, the work done by the reciprocating compressor is
Maximum
Zero
Equal to polytropic work
Equal to isothermal work
