A piston compresses two kilograms of air in an insulated cylinder such that the pressure changes from 100 kPa to 1000 kPa. If the initial temperature is 25ºC, the entropy change of the air is nearest:
A) 3.6 kJ/K
B) 2.2 kJ/K
C) 1.7 kJ/K
D) 0.008 kJ/K
D) 0.008 kJ/K
The temperature at the end of the compression is:
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A ____________________ is a horse who has not yet won a race
Fill in the blank(s) with correct word
The shaft seal on an open compressor is more complicated than the gaskets and seals on other parts of the compressor because:
A) It must seal against a higher pressure. B) It must seal a shaft that is turning. C) It must seal in a vacuum. D) It is subjected to both refrigerant and oil while other seals and gaskets are not.
Technician A says that pressure testing involves injecting pressurized air into engine block water and oil passages. Technician B says that pressure testing involves injecting pressurized water into engine block water and oil passages. Which technician is correct?
A) Technician A B) Technician B C) Both technicians D) Neither technician
List at least four different types of materials typically used to protect the roof:
What will be an ideal response?