The function of the compressor in the refrigeration cycle is:
A) Lower the pressure and temperature of the refrigerant.
B) Raise the pressure and temperature of the refrigerant.
C) Regulate the refrigerant flow.
D) Filter the refrigerant.
B
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The coefficient of performance of the refrigeration cycle when operating as an air-conditioner is nearest:
A 5-ton ideal air-conditioner operates between 120 kPa and 800 kPa. The refrigerant is R134a.
A) 3.6
B) 3.9
C) 4.2
D) 4.6
Selective catalytic reduction (SCR) uses urea injection to reduce ________ emissions
A) CO2 B) NOx C) H2O D) CO
Soft wheat has a greater protein content compared to hard wheat
Indicate whether the statement is true or false
As a drafter was finishing a set of drawings for a small gas engine, she noticed that the piston was larger than the cylinder it fits in. She should:
A. change the dimensions and tell her supervisor later B. complete an engineering change request C. ignore it because she did not make the mistake D. finish the drawing and tell her supervisor