WorksheetsType II Practice Questions
Total questions: 34
Worksheet time: 17mins
Leaks must be repaired on industrial process and refrigeration units with a 50-pound charge or greater when the annualized leak rate reaches _____ or more.
10%
20%
30%
40%
Unless plans are made to replace a system with a leak rate that exceeds the maximum leak rate, repairs must be made within;
30 days.
45 days.
60 days.
90 days.
Refrigerants CFC-12, HCFC-22, and HFC-134a are all classified as Type _______ substances.
B-1
B-2
A-1
A-2
All HVAC/R systems must be protected by a;
Low-pressure switch
High-pressure switch
Compressor impedance overload
Pressure relief valve
A refrigerant sensor which will sound an alarm and automatically start a ventilation system in occupied equipment rooms falls under ASHRAE Standard;
A. 15
B. 34
C. 44
D. 60
Non-condensables will cause;
Low superheat
Low discharge pressure
High superheat
High discharge pressure
A crankcase heater is often used to prevent refrigerant from mixing with compressor oil during periods of:
Low ambient temperature
High ambient temperature
Low humidity
EPA regulations state that removal of which component constitutes a "major repair"?
Pressure switch
Compressor
Liquid line drier
Evaporator fan motor
A comfort cooling system that contains 50 pounds or more of R-410A is leaking. What will be the new maximum allowable annual leak rate starting in 2019?
5%
10%
15%
20%
What can be done with a refrigerant trace gas and nitrogen mixture after a system leak is found?
Recover the mixture.
Recover in a special recovery tank.
Recycle the refrigerant back into the system.
Release to the atmosphere.
When an appliance containing 50 pounds or more of a regulated refrigerant leaks refrigerant at an annual rate of 125% or more, what must be included on the leak inspections records?
Initial verification, verification tests and records of recovered refrigerant from equipment.
Quantity of refrigerant sold, procedures performed, date of call, name, address and phone number of manufacturer.
Quantity of refrigerant, address of service technician, number of years in HVAC.
The amount of refrigerant and addresses only.
A high-pressure appliance containing less than 200 lbs. of an HCFC or HFC refrigerant must be evacuated (recovered) to a level of;
15 inches of vacuum
10 inches of vacuum
4 inches of vacuum
0 inches of vacuum
When dehydrating a system, it should be evacuated to a minimum level of;
30 inches of Mercury
25,000 Microns
500 Microns
EPA does not have a requirement
When recovering refrigerant from a medium-pressure system with more than 200 lbs. of refrigerant, recover to a level of;
0” Hg
4” Hg
10” Hg
15” Hg
When using a recovery unit on a system containing 100 lbs. of R-410A it must be evacuated to.
0 inches of Mercury
4 inches of Mercury
10 inches of Mercury
15 inches of Mercury
A high-pressure appliance containing 210 lbs. of R-407C refrigerant must be evacuated (recovered) to a level of;
15 inches of vacuum
10 inches of vacuum
4 inches of vacuum
0 inches of vacuum
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 internal pressure of 0 psig
B. A system that is undergoing a major component replacement
C. A system that uses a CFC refrigerant
D. A system that has a non-operational compressor
A new split system should be checked for leaks by.
pressurizing the system with a few ounces of HCFC-22 and compressed air.
pressurizing the system with a few ounces of CFC-12 and an inert gas.
releasing the factory refrigerant charge in the condensing unit.
pressurizing the system with an inert gas.
If a leaking appliance with a regulated refrigerant is not going to be repaired, it must be.
retrofitted or retired within 3 months.
retrofitted or retired within 12 months.
replaced within 3 months.
replaced within 12 months.
Refrigerant should be recovered from the condenser outlet if the condenser is.
Below the receiver
Above the receiver
EPA regulations require that all Industrial Process Refrigeration (IPR) systems containing more than 50 pounds of refrigerant MUST be repaired when the annual leak rate exceeds;
10 %
20 %
30 %
40 %
Proper recovery techniques begin with the use of appropriate recovery equipment that has been certified by;
A. EPA only
B. Manufacturers approved by UL
C. EPA approved laboratory
D. EPA field supervisors
What happens to a refrigerant that is heated above the saturation temperature?
It remains in the vapor state.
It remains in the liquid state.
It absorbs moisture at an increased rate.
It cools the compressor more efficiently.
Which of the following refrigerants is classified as a very high-pressure refrigerant?
CFC-11
R-744
HCFC-123
R-410A
What must the equipment owners/operators include in recovered refrigerant records for equipment with refrigerant charges that range from 5 to 50 pounds?
The quantity of refrigerant (by type) added or recovered from disposed appliances each year and quantity of refrigerant (by type) sent for reclamation or destruction.
The quantity of refrigerant (by type) added or recovered from disposed appliances in each calendar month and quantity of refrigerant (by type) sent for reclamation or destruction.
The type of refrigerant, the amount added for seasonal variance, the amount added to a new unit, recovered from disposed appliances in each calendar month and quantity of refrigerant (by type) sent for reclamation or destruction.
The amount of new refrigerant added to a system in each calendar month and quantity of refrigerant (by type) sent for reclamation or destruction.
Who must be Type II Certified?
Technicians maintaining, servicing, repairing, or disposing medium-pressure to very high-pressure appliances, except for small appliances, low-pressure appliances and motor vehicle air conditioning systems.
Everyone working on refrigeration appliances and automobiles.
Automobile repair personnel maintaining, servicing, repairing, or disposing high pressure or very high-pressure appliances.
All technicians that do not use vacuum pumps for small appliances and motor vehicle air conditioning systems.
After the installation of any type of system, the unit should first be:
Pressurized with air and checked for leaks.
Pressurized with an inert gas and leak checked.
Charged according to manufacturer's guidelines.
Left 24 hours to allow the system to stabilize.
When performing refrigerant system service on a unit that has a receiver/storage tank, refrigerant should be placed in the:
Condenser.
Compressor.
Evaporator.
Receiver/storage tank.
Although recovering refrigerant in the vapor phase will minimize the loss of oil, recovering as much as possible in the liquid phase will:
Reduce recovery time.
Keep the moisture in the lines.
Reduce leaks.
Cause leaks.
After recovery, refrigerant may be:
Returned to the appliance from which it was removed or to another appliance owned by the same person without being recycled or reclaimed.
Sold to the highest bidder on the market.
Given away to a friend that needs it.
Released into the ambient air.
Disposable cylinders must be:
Recovered and used again.
Discarded.
Used for air.
Stored away.
It is necessary to frequently check and change the recycling machine’s:
Oil and filter.
Wiring.
Serial number.
Dates.
Quick couplers, self-sealing hoses, and hand valves should be used to:
Quickly vent contaminated refrigerant in case of an emergency.
Release excess amounts of nitrogen or air from the system.
Maximize intentional and unintentional refrigerant releases.
Minimize refrigerant losses when hoses are connected/disconnected.
A major system repair involves the removal of: A. Compressor, condenser, evaporator B. The housing of the unit and the electrical control panel. C. An evaporator fan motor or condenser fan motor. D. The system’s total refrigerant charge.
Compressor, condenser, evaporator
The housing of the unit and the electrical control panel.
An evaporator fan motor or condenser fan motor.
The system’s total refrigerant charge.
