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Hvac > EPA Type 2 > Flashcards

EPA Type 2 Flashcards

1
Q

Comfort cooling appliances with a 50 pound charge or more with an annualized leak rate of _____ or more must have leaks repaired.

A 15%

B 25%

C 35%

D 40%

A

A 15%

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2
Q

Unless plans are made to replace a system exceeding the maximum leak, repairs must be made in;

A 30 days.

B 45 days.

C 60 days.

D 90 days.

A

A 30 days

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3
Q

Refrigerants CFC R-12, HCFC R-22, and HFC 134a are all classified as;

A Type B-1

B Type B-2

C Type A-1

D Type A-2

A

C Type A-1

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4
Q

All Refrigeration & HVAC systems are protected by a;

A Low pressure switch

B High pressure switch

C Compressor impedance overload

D Pressure relief valve

A

D Pressure relief valve

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5
Q

A refrigerant sensor which will sound an alarm and automatically start a ventilation system in occupied equipment rooms fall under;

A ASHRAE Standard 15

B ASHRAE Standard 34

C ASHRAE Standard 44

D ASHRAE Standard 60

A

A ASHRAE Standard 15

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6
Q

Non-condensables will cause;

A Low superheat

B Low discharge pressure

C High superheat

D High discharge pressure

A

D High discharge pressure

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7
Q

A crankcase heater is often used to prevent refrigerant from migrating to the oil during periods of:

A Low ambient temperature

B High ambient temperature

C Low humidity

D High humidity

A

A Low ambient temperature

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8
Q

EPA regulations state that maintenance, service or repair involving the removal of the following component is a “major repair”

A Pressure switch

B Compressor

C Liquid line drier

D Evaporator fan motor

A

B Compressor

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9
Q

Which of the following refrigerants is an HCFC?

A R-22

B R-134a

C R-1234YF

D R-410A

A

A R-22

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10
Q

What can be done with the refrigerant trace gas and nitrogen after the leak is found?

A Recover the mixture.

B Recover in a special recovery tank.

C Recycle the refrigerant back into the system.

D Release to the atmosphere.

A

D Release to the atmosphere.

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11
Q

High pressure appliances can be evacuated to atmospheric pressure (O psig) when;

A Using both liquid and suction line driers

B the appiance is charged with an HFC refrigerant

C Charging Refrigerant back into the system after a minor repair

D There is a leak

A

D There is a leak

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12
Q

If a high pressure appliance containing 100 lbs. of an HCFC OTHER THAN R-22 refrigerant Recovery and/or Recycling equipment manufactured after November 15, 1993 must be evacuated to a level of;

A 15 inches of vacuum

B 10 inches of vacuum

C 4 inches of vacuum

D 0 inches of vacuum

A

B 10 inches of vacuum

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13
Q

When dehydrating a system it should be evacuated to a level of;

A 30 inches of Mercury

B 25,000 Microns

C 500 Microns

D EPA does not have a requirement

A

C 500 Microns

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14
Q

When recovering from a system with a refrigerant leak, recover to a level of;

A Need not be recovered

B Same as any system

C 0 Psia

D 0 Psig

A

D 0 Psig

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15
Q

When using a recovery system manufactured after November 15, 1993 on a system containing 100 lbs. of R-502 must be evacuated to;

A 0 inches of Mercury

B 4 inches of Mercury

C 10 inches of Mercury

D 15 inches of Mercury

A

C 10 inches of Mercury

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16
Q

If a high pressure appliance containing 210 lbs. of R-22 refrigerant Recovery and/or Recycling equipment manufactured before November 15, 1993 must be evacuated to a level of;

A 15 inches of vacuum

B 10 inches of vacuum

C 4 inches of vacuum

D 0 inches of vacuum

A

C 4 inches of vacuum

17
Q

What conditions allow for a system to be opened and repaired without recovering the refrigerant to the required vacuum level?

A a system with a large leak and system pressure of atmospheric.

B replacement of a major component

C system uses a CFC type refrigerant

D the compressor is not operational

A

A a system with a large leak and system pressure of atmospheric.

18
Q

A new split system should be checked for leaks by;

A pressurizing the system with a few ounces of R-22 and compressed air.

B pressurizing the system with a few ounces of CFC-12 and an inert gas.

C releasing the factory charge in the condensing unit.

D pressurizing the system with a few ounces of R-22 and an inert gas.

A

D pressurizing the system with a few ounces of R-22 and an inert gas.

19
Q

An overcharged system will operate;

A with a lower head pressure.

B less efficiently.

C with higher efficiencies.

D with low power consumption.

A

B less efficiently.

20
Q

Refrigerant should be removed from the condenser outlet if the condenser is;

A Below the receiver

B Above the receiver

C On the roof

D Is leaking

A

A Below the receiver

21
Q

EPA regulations require that all Commercial and Industrial Process Refrigeration containing more than 50lbs. of refrigerant MUST be repaired when the annual leak rate exceeds;

A 15 %

B 30 %

C 35 %

D 80 %

A

C 35 %

22
Q

Proper recovery techniques begin with the use of appropriate recovery equipment that has been certified by;

A EPA only

B Manufactures approved by UL

C EPA approved laboratory

D EPA field supervisors

A

C EPA approved laboratory

23
Q

What happens to a refrigerant that is above the saturation temperature?

A It remains in a vapor state.

B It remains in a liquid state.

C It absorbs moisture at an increased rate.

D It cools the compressor more efficiently.

A

A It remains in a vapor state.

24
Q

Which of the following refrigerant is considered high or very high pressure refrigerant?

A CFC-11

B HFC-134a

C HCFC-123

D All CFCs

A

B HFC-134a

25
Q

Air conditioning system short cycling is normally caused by;

A the system being too small for the home.

B the system being oversized for the home.

C a dirty condenser.

D a dirty evaporator.

A

B the system being oversized for the home.

26
Q

What level of recovery ( in inches of mercury) is required when:
HCFC-22 appliances or isolated components of such appliances normally containing less than 200 lbs. of refrigerant before 11/15/93

A) 0
B) 4
C) 10
D) 15

A

A) 0

27
Q

What level of recovery ( in inches of mercury) is required when:
HCFC-22 appliances or isolated components of such appliances normally containing less than 200 lbs. of refrigerant after 11/15/93

A) 0
B) 4
C) 10
D) 15

A

A)0

28
Q

What level of recovery ( in inches of mercury) is required when:
HCFC-22 appliances or isolated components of such appliances normally containing more than 200 lbs. of refrigerant after 11/15/93
A) 0
B) 4
C) 10
D) 15

A

C) 10

29
Q

What level of recovery ( in inches of mercury) is required when:
HCFC-22 appliances or isolated components of such appliances normally containing more than 200 lbs. of refrigerant before 11/15/93

A) 0
B) 4
C) 10
D) 15

A

B) 4

30
Q

What level of recovery ( in inches of mercury) is required when:
Other high pressure appliances or isolated components of such appliances normally containing more than 200 lbs. of refrigerant before 11/15/93

A) 0
B) 4
C) 10
D) 15

A

B)4

31
Q

What level of recovery ( in inches of mercury) is required when:
Other high pressure appliances or isolated components of such appliances normally containing more than 200 lbs. of refrigerant after 11/15/93

A) 0
B) 4
C) 10
D) 15

A

D)15

32
Q

What level of recovery ( in inches of mercury) is required when:
Other high pressure appliances or isolated components of such appliances normally containing less than 200 lbs. of refrigerant before 11/15/93

A) 0
B) 4
C) 10
D) 15

A

B)4

33
Q

What level of recovery ( in inches of mercury) is required when:
Other high pressure appliances or isolated components of such appliances normally containing less than 200 lbs. of refrigerant after 11/15/93

A) 0
B) 4
C) 10
D) 15

A

C)10

Hvac (18 decks)

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