EPA 608 TYPE 3 TEST ACTUAL EXAM 210 QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES (VERIFIED ANSWERS) |ALREADY GRADED A+

EPA 608 TYPE 3 TEST 2023-2024 ACTUAL EXAM 210

QUESTIONS AND CORRECT DETAILED ANSWERS

WITH RATIONALES (VERIFIED ANSWERS)

|ALREADY GRADED A+

A system does not have to be evacuated all the way to the required level

when: - ANSWER- leaks in the appliance make evacuation to the

prescribed level unattainable

Which of the foloowing repairs would ALWAYS be considered "major"

under EPA's - ANSWER- replacement of evaporator coil

Under EPA's regulation's _______ is used to pressurize a low pressure

chiller for the purpose of opening the system for a non major repair? -

ANSWER- warming the refrigerant

If you are using a recovery machine manufactored AFTER 11-15-93 you

must evacuate an low pressure appliance to _______ before making a

major repair. - ANSWER- 25 mm of Hg absolute

After reaching the required recovery vacuum on a chiller, you should -

ANSWER- Wait for at least a few minutes to see if the system pressure

rises, indicating that there is till refrigerant in a liquid form or in the oil

The pressure corresponding to 32 F for R-123 - ANSWER- 20 inches of

HG vacuum

When evacuating a system the use of too large a vacuum pump can

cause? - ANSWER- trapped water to freeze

Refrigerant-11 at a pressure of 17 inches HG vacuum has a saturation

temperature of: - ANSWER- 35F

During the evacuation of a system containing large amounts of moisture

you can prevent freezing of this moisture by increasing the pressure

with______gas - ANSWER- nitrogen

ASHRAE standard 15-1994 requires that each machinery room must

activate an alarm and mechanical ventilation beofre refrigerant

concentrations exceed: - ANSWER- the threshold limit valve and time

weighted average

The typical design burst pressure for a rupture disk on a low pressure

centrifugal air-conditioning system is set at_______ - ANSWER- 15 psi

Heat pumps that have been retrofitted from R22 to R407C should be

leak checked with: - ANSWER- pressurized nitrogen

When a new system has been assembled, the first thing to do is: -

ANSWER- pressurize the system with inert gas and leak check

EPA regulations require that leaking commercial or industrial process

refrigeration equipment must be repaired when the leak rate

exceeds______ of the charge per year. - ANSWER- 35%

Prior to replacing the condenser coil in a high pressure system, the

refrigerant was recovered and stored in a refillable container. The

refrigerant: - ANSWER- can probably be charged back into the system

R-410A requires recovery tanks rated for at least: - ANSWER- 400 psig

to recover liquid refrigerant you must connect one hose to the -

ANSWER- liquid line

The primary water source for cooling the condenser of a water-cooled

recovery unit is: - ANSWER- local municipal water supply

After refrigerant liquid has been recovered from a system, any remaining

vapor is: - ANSWER- condensed by the recovery system

With an air-cooled condenser on the roof of a building and the

evaporator on the first floor, recovery should first occur: - ANSWERfrom the liquid line entering the evaporator

the recovery of refrigerant from a system as a vapor only will minimize

the loss of: - ANSWER- oil

When using recovery or recycling equipment that was made after 11-15-

93 you must evacute a system containing MORE than 200 pounds of

CFC-12 to ________ before making a major repair. - ANSWER- 15

inches of HG vacuum

When using recovery or recycling equipment that was made BEFORE

11-15-93 technicians must evacuate a unit that has a normal charge of 10

pounds of CFC-500 to _____ before disposing of the system. -

ANSWER- 4 inches of HG vacuum

To change the compressor on a system cantaining 40 pounds R-500

using a recycling machine that was manufactured AFTER 11-15-93 you

must isolate the compressor then: - ANSWER- evacuate the isolated

section of the system to 10 inches of vacuum and hold. If the system

pressure does not rise, remove the compressor.

Recycling and recovery equipment maufactured after 11-15-93 does not

need an oil separator - ANSWER- ...

A system can be evacuated to only atmospheric pressure when: -

ANSWER- leaks in the appliance make the evacuation to the prescribed

level unattainable

To change the compressor on a system containing R-410A, you must

isolate the compressor then: - ANSWER- Evacuate the isolated section

of the system to atmospheric pressure and hold. If system pressure does

not rise, remove the compressor.