Topics: ASHRAE/CMR
1: NH3 is
- R-508A
- R-718
- ammonia
- lithium bromide
2: What refrigerant doesn't have to be classifted?
- R-134a
- R-717
- R-711
- R-718
3: Ammonia can come in contact with _______ ?
- Copper tubing
- Copper
- Aluminum
- Brass
4: Machinery rooms must be vented to ______?
- basement
- neutralizing tank
- unoccupied spaces
- outdoors
5: What is Trichlorotrifluoromethane?
- R-12
- R-113
- R-13
- R-11
6: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code
- Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
- over pressure protection as well as a temperature protection device
- over pressure protection
- over pressure protection and a rupture disc
7: Refrigerant piping crossing an open space that affords passageway in any building shall not be less than _____ feet above the floor unless piping is located against the ceiling.
- 7.00'
- 7.25'
- 9.00'
- 8'4"
8: Refrigeration piping before being buried shall be
- leak tested
- encased in pipe duct
- pressure tested
- All of the above
9: Defined process piping by code CMR (528)
- Any piping that conveys a solid, liquid or gas that is not part of the plumbing or fire protection system
- Any piping in an industrial space
- Any piping in an industrial or commercial space
- All of the above
10: What is an example of institutional occupancy?
- Football stadium
- Dorms
- Hospital
- Shopping mall
11: Pressure limiting devices are not required for systems containing less then ________ refrigerants.
- 6.6 lbs
- 44 lbs
- 13.9 lbs
- 22 lbs
12: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere
- 6.6
- 330
- 1,000
- 110
13: 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
14: Doors communicating with outside from a mechanical room must be?
- Self-closing, aligned, fire door
- Steel, approved, weather-stripped
- Self-closing, approved, fire door
- Self-closing, wooden, fire door
15: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 25
- 50
- 66
- 22
16: Dual-pressure relief devices should be installed on
- vessels of 10 cubic feet or more
- vessels of 3 cubic feet or more
- vessels of 10 cubic feet or less
- vessels of 3 cubic feet or less
17: The test pressure applied to the high side of each factory-assembled refrigerating system shall be at least equal to the design pressure of
- the low side
- the high side
- the aggregate of the high side and low side
- 2.5 times the design pressure
18: What type of pressure relief device is used on a CO2 system?
- Glove valve
- Fusible plug
- Rupture disk
- Gate valve
19: 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
20: Where must a refrigeration contractor's license number be displayed?
- Trucks, invoices, and advertising
- Uniforms, checks, and invoices.
- Truck, office, every job, and on all equipment
- Trucks, license plates, and uniforms
21: Name an HCFC refrigerant(s):
- R-22
- R-123
- R-11
- both a & b
22: What is the minimum height refrigeration piping should be placed against walls?
- 72"
- 6'
- Ceiling height
- 7.25'
23: Which refrigerant(s) is an HFC?
- R-22
- R-410A
- R-502
- All of the above
24: When systems are protected by a high pressure relief device, the compressor's pressure limiting device shall be set at or below ____ % of the operating pressure of the high side relief device.
- 80
- 100
- 110
- 90
25: Refrigerants shall be classified by
- toxicity and flammability
- color codes
- maximum permissible quantities of each group
- requirements for commercial, industrial, and residential occupancies