Register
When under a deep vacuum the motor winding of a hermetic refrigeration compressor: ______. a. will be damaged if energized. b. must be kept warm to operate properly. c. will be protected by its insulation.
151k views
1 vote
When under a deep vacuum the motor winding of a hermetic refrigeration compressor: ______.

a. will be damaged if energized.
b. must be kept warm to operate properly.
c. will be protected by its insulation.

User Sola
by
6.7k points

1 Answer

6 votes

Answer:

a. will be damaged if energized

Step-by-step explanation:

A hermetic compressor needs a coolant to prevent overheating of the motor. The cooling of the compressor depends on the flow of the refrigerant through the compressor hence when under a deep vacuum, the motor winding of a hermetic compressor can overheat.

A crankcase heater is used to prevent the mixing of refrigerant and oil at low temperatures. The mixing of refrigerant and oil can cause oil foaming in the vacuum. When under a deep vacuum, the motor winding of a hermetic compressor can overheat if the crankcase heater is energized.

User Tilman Koester
by
5.9k points
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

6.5m questions

8.6m answers

Other Questions

A piston-cylinder device fitted with stops in the cylinder walls contains 2.1 kg of water initially at 150 kPa and 30 °C. Heat is transferred to the system until the final temperature reaches 250 °C. The
The bulk modulus of a fluid if it undergoes a 1% change in volume when subjected to a pressure change of 10,000 psi is (a) 0.01 psi (b) 0.001 psi (c) 0.00001 psi (d) 0.000001 psi (e) none of these
A car has an initial speed of 10 m/s. It then undergoes a constant acceleration of 0.05 m/s^2 over a distance of 5 km. Determine: a) The car final speed. b) The time needed to travel the 5 km.
In solid motors, HTPB and PBAN are two common types of plasticizers. a) True b) False
Where are all the controls on most circuits?
Link Copied!