What should a technician do with the Schrader valve core when he/she wants to pull a deep vacuum as quickly as possible?

Remove the Schrader valve core.

Which of the following is an overcurrent protection device that detects current imbalances between ungrounded and grounded conductor? A. Circuit breaker, B. Fuse, C. Ground fault circuit interrupter, D. Thermistor

Ground fault circuit interrupter

Which of the following best describes the way fully hermetic compressors are lubricated? Options: The mechanical systems are packed with grease and sealed at the factory and require no additional lubrication. They are lubricated by oil circulating with the refrigerant. They are lubricated by oil pumped in from an external reservoir. Keeping the evaporator pressure high prevents floodback

They are lubricated by oil circulating with the refrigerant.

What is the primary purpose of an accumulator?

Protect a compressor from liquid refrigerant

What is the purpose of refrigerant line valves?

Can be closed to cut off refrigerant flow through a section of piping

When using an air cooling evaporator, which of the following should occur? Transfers heat from the air circulating over it to the refrigerant inside the tubing, Use oil as the primary medium for cooling the surrounding air, Uses heat condensing as the primary medium for cooling the surrounding air, Transfers cold air from the air circulating in the space to cool the refrigerant inside the tubing

Transfers heat from the air circulating over it to the refrigerant inside the tubing

What is defined as the amount of friction or resistance used to design the longest duct run?

Available static pressure (ASP)

How do Packaged Terminal Air Conditioners (PTHP) change between modes of operation (heating and cooling)?

A reversing valve changes the direction of refrigerant flow

What does a split air-conditioning system 'split'?

System components into two separate locations

Service Work and Safety Flashcard Flashcards

Student preview

100 questions

Show all answers

1.

FLASHCARD QUESTION

Front

There are two types of service work, one is maintenance. What is the other type of service work?

Back

System repair

2.

FLASHCARD QUESTION

Front

What national law/agency covers workplace safety?

Back

OSHA

3.

FLASHCARD QUESTION

Front

How many Btu per hour is equivalent to one ton of refrigeration?

Back

12,000 Btu/hr

4.

FLASHCARD QUESTION

Front

Which state of refrigerant is capable of absorbing the most heat? Options: High-pressure liquid, High-pressure vapor, Low-pressure liquid, Low-pressure vapor

Back

Low-pressure liquid

5.

FLASHCARD QUESTION

Front

What is a gas?

Back

Any physical substance that has no definite volume or shape and expands to fill its container.

6.

FLASHCARD QUESTION

Front

There are two types of service work, one is maintenance. What is the other type of service work?

Back

System repair

7.

FLASHCARD QUESTION

Front

What national law/agency covers workplace safety?

Back

OSHA

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