Which of the following is not a function of the compressor in a refrigeration system?
a) draw low pressure refrigerant out of the evaporator
b) draw low temperature refrigerant out of the evaporator
c) lower the temperature of the refrigerant
d) maintain sufficiently low pressure in the evaporator
e) raise the pressure of the refrigerant
Answer: C
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Power Engineering Chapter 116
- A compressor seal is required to prevent:
- The function of a safety heads is to:
- Which part is not a part of a reciprocating compressor?
- Consider a single stage, single acting reciprocating compressor. Calculate the piston displacement in cubic metres per minute, if given the following: piston stroke 12 cm piston diameter 10 cm piston speed 1100 working strokes per minute
- Which one is NOT true about rotating mechanical seals
- Packing gland seals are used on what compressor?
- Shaft seals are used on what compressor?
- Advantages of the centrifugal compressor are?
- Helical rotors revolve at speeds up to ___ r/min
- Reciprocating Compressor Types are? i. Open type ii. Hermetic type iii. Semihermetic type iv. Rotating sliding vane design v. Helical rotor design
- Which of the following compressor types uses impellers to draw in vapour?
- In a refrigeration system, the purpose of the compressor is to
- Which of the following is the compressor responsible for doing? i) Maintains a high pressure in the condenser ii) Maintains a low pressure in the evaporator iii) Raises the pressure of the refrigerant
- The pressure ratio of a refrigeration compressor can be calculated by dividing the:
- Refrigerant compressors:
- In a sliding vane design refrigeration compressor, a good seal is maintained between the vanes and the cylinder by:
- Which of the following is NOT a function of the refrigeration compressor?
- A stationary crankshaft seal used on refrigeration compressors, which consists of a metallic bellows soldered at one end to a ring, and which presses against a shoulder on the shaft is called a:
- For a Helical Rotor Design rotary refrigeration compressor, which of the following statements is true?
- Which of the following is NOT considered a rotary refrigeration compressor design?
- A negative factor of Hermetic Type refrigeration compressors is:
- The safety head of a refrigeration compressor is designed to:
- Refrigerant compressors: