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313D Refrigeration Training > 313D Exam - V6 (Complete) > Flashcards

313D Exam - V6 (Complete) Flashcards

Exam V-6

1
Q

When brazing in a reversing valve, the maximum temperature the valve should be exposed to is?

A

250F

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2
Q

The maximum temp increase in a reversing valve for a suction gas entering to leaving is?

A

5 Degrees

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3
Q

The outer bottom ports of a reversing valve are connected to?

A

Indoor and outdoor coils

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4
Q

The bottom middle port of a reversing valve is connected to?

A

Compressor suction

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5
Q

The top port of a reversing valve, which is all by itself, is hooked up to?

A

Compressor discharge

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6
Q

The coil of the reversing valve is energized by what terminals?

A

O and C

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7
Q

The two main parts of a reversing valve are?

A

Main body and solenoid coil

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8
Q

When heat provided by a heat pump equals the heat loss of a structure this is called?

A

Balance point

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9
Q

The defrost terminates on time, or when the refrigerant leaving the outdoor coil reaches?

A

50F

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10
Q

The defrost cycle initiated when the refrigerant leaving the outdoor coil in the heating mode reaches

A

28F

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11
Q

True or False
Resistance converts electrical energy to another form of energy

A

True

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12
Q

Electrons flow because…

A
  1. They repel each other
  2. Moving magnetic fields induce flow
  3. They are attracted to positive ions
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13
Q

What type of refrigerant is an HFC refrigerant?

A

R410A

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14
Q

A potential relay…

A
  1. Has contacts that are normally closed
  2. Uses voltage from the start winding to operate the contacts
  3. Disconnects the start winding
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15
Q

The coil voltage of a relay is always identical to the contact rating…true or false?

A

False

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16
Q

An amperage relay…

A
  1. Briefly engages the start winding
  2. Uses run winding amperage to operate
17
Q

Motor loads require what kind of fuse…

A

Time delay fuses

18
Q

Nitrogen is?

A

Nontoxic

19
Q

Which type of refrigerant does not deplete the stratospheric ozone?

A

R410A

20
Q

The depletion of stratospheric ozone is a global problem because excess ultra violet radiation from the sun is now reaching our planet. T or F?

A

True

21
Q

There are now 2 refrigerants in use for residential air conditioning and both are global warming and greenhouse gases.
T or F ?

A

False

22
Q

What type of refrigerant is a blend?

A

R410A

23
Q

R22…

A
  1. Is an HCFC
  2. Will be completely phased out by Jan 1, 2030
  3. Has chlorine in it
24
Q

What is a concern with R410A?

A
  • It’s operating pressures are much higher than R22
  • It’s lubricant is very hygroscopic
25
Q

Refrigeration is not about cold; it is about heat, and the moving of heat
T or F?

A

True

26
Q

A technician is replacing a faulty capacitor. The one being removed is 35MFD, 440 V. Which of the following scenarios is acceptable?

A. 20MFD, 570V and 17MFD, 440V connected on parallel

B. 20MFD, 370V and 15MFD, 370V connected in series

C. 20MFD, 370V and 15 MFD, 370V connected in parallel

D. 20 MFD, 220V and 17MFD, 220V connected in series

A

A

27
Q

The capacitor on a CSIR motor…

A

Increases starting torque

28
Q

When brazing in a reversing valve, the maximum temperature the valve should be exposed to is?

A

250F

29
Q

A technician is replacing a faulty capacitor. The capacitor being removed is rated as: 27MFD, 440V. Which of the following is considerable for use?

A. 27MFD, 370V
B. 54 MFD, 370V
C. 20MFD, 440V
D. 30MFD, 570V

A

D

313D Refrigeration Training (10 decks)

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