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Which of the air compressors, is NOT a rotary type compressor?
Which of the air compressors, is NOT a rotary type compressor?
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Just look at the names. Screw, Scroll, and Vane all imply something turning or spinning (Rotary). A Piston implies something pumping up and down (Reciprocating).
Updated On: Jul 1, 2026
- Screw type compressor
- Scroll type compressor
- Vane type compressor
- Piston type compressor
Show Solution
The Correct Option is D
Solution and Explanation
1. Rotary Type Compressors: These compressors use rotating elements (rotors, screws, or vanes) to trap and compress air. They are known for providing a continuous, pulse-free flow of air.
• Screw Type: Uses two intermeshing helical screws.
• Scroll Type: Uses two spiral-shaped elements (one fixed, one orbiting).
• Vane Type: Uses a rotor with sliding vanes inside an eccentric housing.
2. Reciprocating Type Compressors: The
Piston type compressor is the classic example of a reciprocating compressor. It uses a piston driven by a crankshaft to move back and forth inside a cylinder.
• Suction occurs as the piston moves down.
• Compression occurs as the piston moves up.
• Screw Type: Uses two intermeshing helical screws.
• Scroll Type: Uses two spiral-shaped elements (one fixed, one orbiting).
• Vane Type: Uses a rotor with sliding vanes inside an eccentric housing.
2. Reciprocating Type Compressors: The
Piston type compressor is the classic example of a reciprocating compressor. It uses a piston driven by a crankshaft to move back and forth inside a cylinder.
• Suction occurs as the piston moves down.
• Compression occurs as the piston moves up.
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