Topics: ASHRAE/CMR
1: Pipe identification labels are required when the system contains more than
- 55 lbs
- 120 lbs
- 110 lbs
- 65 lbs
2: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?
- R-113
- R-11
- R-22
- R-12
3: Relief valves are rated in
- gallons of water per minute
- gallons of water per hour
- pounds of air per hour
- pounds of air per minute
4: What pipe can not be used for refrigeration?
- K
- L
- N
- M
5: How are refrigerant blends classified?
- Based on the oil used
- Blends don't have to be classified
- Based on worst case fractionation
- Based on best case Fractionation
6: A hotel is considered a _______ occupancy.
- institutional
- residential
- commercial
- mercantile
7: What refrigerant doesn't have to be classified?
- R-717
- R-718
- R-422A
- R-134A
8: Liquid level gauges shall have _____________ with one exception being that of the liquid level gauge bull’s eye type.
- color-coded glass to determine type of refrigerant
- moisture indicators
- automatic closing shut-off valves
- All of the above
9: What is R-22?
- HFC
- Chlorodifluoromethane
- Chlorofluoromethane
- CCFCM
10: The color code of a tank of ammonia is
- silver
- light green
- lavender
- white
11: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 660 lbs
- 330 lbs.
- 55 lbs
- 550 lbs
12: Pressure vessels nameplate markings must be compliant with the
- ASHRAE 34 Standards
- CMR-588 & CMR-528
- ASME Boiler and Pressure Vessel Code
- All of the Above
13: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
- True
- False
14: pressure relief valves must discharge to the atmosphere at a location not less than 15 feet from ground level and ____ feet from any window, ventilation opening, or exits of buildings.
- 10
- 25
- 15
- 20
15: A pressure relief should be located at least _______ from windows and doors.
- 20'
- 15'
- 25'
- 30'
16: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
- Class A machinery room
- Class B machinery room
- Class M machinery room
- Class T machinery room
17: An example of direct system is
- rooftop unit
- chiller
- absorber
- none of the above
18: A Category D fluid
- is when the fluid handled is non flammable, nontoxic, and not damaging to human as defined in ANSI/ASME Process Piping.
- is when the design pressure does not exceed 150 psi
- a fluid for service piping in which the potential for personnel exposure is judged to cause harm and irreversible damage to those persons exposed to it
- Both a and b are correct
19: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants
- lower
- there is no Group B1 refrigerants
- the same
- higher
20: When must refrigeration system covered by the code be inspected?
- Annually
- Upon installation
- Annually and when installed
- Not required
21: How many groups of refrigerants are there?
- 7
- 3
- 1
- 5
22: Direct systems using Group II refrigerants
- shall be installed per instruction of the AHJ
- shall be installed in Class T machinery rooms
- shall be allowed to be used for human comfort.
- shall not be used for air condition for human comfort
23: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the
- 24 volt secondary side of the Class 2 transformer to the thermostat
- first disconnect in
- breaker panel in
- load-side of the contactor in
24: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant
- shall have a pressure limiting device installed on the high side of the system
- does not require a pressure-limiting device
- shall have a pressure limiting device and a pressure relief valve installed
- shall be inspected by the Boiler of Inspectors bi-annually
25: Trichlorofluoromethane is the name of what refrigerant?
- R-113
- R-502
- R-12
- R-11