Chapter 8 AIR COMPRESSORS AND THEIR MCQs 20 min Score: 0 Attempted: 0/20 Subscribe 1. The volume of air delivered by the compressor is called (A) Swept volume (B) Compressor capacity (C) Free air delivery (D) All of theseShow All Answers 2. Maximum pressure delivered by reciprocating air compressor (A) 600 bar (B) 700 bar (C) 800 bar (D) 1000 barShow All Answers 3. The maximum free air discharge of rotary air compressor is as high as (A) 3 m³/min (B) 30 m³/min (C) 3000 m³/min (D) 300 m³/minShow All Answers 4. The maximum free air discharge of reciprocating air compressor is as high as (A) 3000 m³/min (B) 300 m³/min (C) 30 m³/min (D) 3 m³/minShow All Answers 5. The maximum delivery pressure in a rotary air compressor (A) 10 bar (B) 20 bar (C) 30 bar (D) 40 barShow All Answers 6. The volume of air sucked by the compressor during its suction stroke is called (A) Free air delivery (B) Compressor capacity (C) None of these (D) Swept volumeShow All Answers 7. When air is admitted to one side of the piston, the compressor is said to be (A) Single stage (B) Multi-stage (C) Double acting (D) Single actingShow All Answers 8. ā¦ā¦ā¦ā¦ā¦ā¦Compressor gives more pressure (A) Reciprocating (B) Rotary (C) Both a and b (D) None of theseShow All Answers 9. Cooling process of air between two stages of a compressor is called (A) After cooling (B) Under cooling (C) Inter cooling (D) All of theseShow All Answers 10. The function of intercooler is to reduce the (A) Temperature of air (B) Density of air (C) Mass of air (D) Pressure of airShow All Answers 11. The inter cooling in multi-stage compression is done (A) To cool the air during compression (B) To cool the air at delivery (C) To enable compression in two stages (D) To minimize the work of compressionShow All Answers 12. Multi-stage compression (A) Reduces the work done per kg of air (B) Improves the volumetric efficiency (C) Reduces the cost of compressor (D) All of theseShow All Answers 13. The actual volume delivered by a compressor when reduced to the normal temperature and pressure condition is called (A) Swept volume (B) Free air delivery (C) Compressor capacity (D) Clearance volumeShow All Answers 14. When the temperature of air leaving intercooler is equal to the original atmospheric temperature of air, the intercooling is called (A) Incomplete intercooling (B) Both a and b (C) Complete intercooling (D) None of theseShow All Answers 15. For maximum volumetric efficiency of an air compressor, the clearance volume is kept (A) Half of stroke volume (B) Maximum (C) Equal to swept volume (D) MinimumShow All Answers 16. Isothermal efficiency of a compressor is also known as (A) Mechanical efficiency (B) Compressor efficiency (C) Adiabatic efficiency (D) Volumetric efficiencyShow All Answers 17. A compressor which compresses air in both ends of the cylinder is known as (A) Single stage (B) Multi-stage (C) Double acting (D) Single actingShow All Answers 18. A compressor which compresses air in more than one or two cylinders is known as (A) Single stage (B) Double acting (C) Single acting (D) Multi-stageShow All Answers 19. ā¦ā¦ā¦ā¦ā¦ā¦Compressors are suitable for supplying less volume of air at high pressure (A) Reciprocating (B) Rotary (C) Single acting (D) Double actingShow All Answers 20. Multi-stage compression is done to increase the -------------- of air in air compressor. (A) Pressure (B) Temperature (C) Both a and b (D) None of theseShow All Answers