Compressors Unit 23 Review Test
3 Questions with All Answers
Updated and Verified
1. The clearance volume of a compressor cylinder is the ____. - Answer-Volume of the
space between the bottom of the valve plate and the top of the piston at the top of the
stroke.
2. The discus valve design is more efficient than a flapper valve design because ____. -
Answer-It allows a compressor design with less clearance volume
3. Liquid entering the compression chamber of a reciprocating compressor can lead to
_____. - Answer-Damaged valves and damaged piston rings
4. T or F Rotary compressors have pistons that rotate inside the cylinders. - Answer-
False
5. T or F The rotary screw compressor uses an open motor instead of the hermetic
design. - Answer-True
6. T or F The sight glass on semihermetic compressor is used to allow light to enter the
crankcase to keep the oil warm. - Answer-False
7. T or F The shell of a hermetic type reciprocating compressor is generally considered
to be on the low pressure side of the system. - Answer-True
8. T or F The hermetic reciprocating compressor motor is essentially made of the same
materials as an open type compressor motor. - Answer-False.
9. If the compression ratio of a system with a reciprocating compressor decreases the
amount of refrigerant pumped by the compressor ____. - Answer-will increase
10. Most of the heat energy in the suction vapor entering the compressor is ____. -
Answer-superheated from the evaporator
11. The temperature of the compressed gas leaving the compressor can best be
described as ____. - Answer-very warm
12. The screw compressor is used primarily in ____. - Answer-Large commercial and
industrial systems
3 Questions with All Answers
Updated and Verified
1. The clearance volume of a compressor cylinder is the ____. - Answer-Volume of the
space between the bottom of the valve plate and the top of the piston at the top of the
stroke.
2. The discus valve design is more efficient than a flapper valve design because ____. -
Answer-It allows a compressor design with less clearance volume
3. Liquid entering the compression chamber of a reciprocating compressor can lead to
_____. - Answer-Damaged valves and damaged piston rings
4. T or F Rotary compressors have pistons that rotate inside the cylinders. - Answer-
False
5. T or F The rotary screw compressor uses an open motor instead of the hermetic
design. - Answer-True
6. T or F The sight glass on semihermetic compressor is used to allow light to enter the
crankcase to keep the oil warm. - Answer-False
7. T or F The shell of a hermetic type reciprocating compressor is generally considered
to be on the low pressure side of the system. - Answer-True
8. T or F The hermetic reciprocating compressor motor is essentially made of the same
materials as an open type compressor motor. - Answer-False.
9. If the compression ratio of a system with a reciprocating compressor decreases the
amount of refrigerant pumped by the compressor ____. - Answer-will increase
10. Most of the heat energy in the suction vapor entering the compressor is ____. -
Answer-superheated from the evaporator
11. The temperature of the compressed gas leaving the compressor can best be
described as ____. - Answer-very warm
12. The screw compressor is used primarily in ____. - Answer-Large commercial and
industrial systems
