Topics: ASHRAE/CMR
1: Systems containing more than 110 pounds must have stop valves located at the
- compressor suction inlet
- compressor discharge outlet
- receiver inlet and outlet
- All of the above
2: 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
3: Single compound Refrigerants are classified by what two criteria?
- Flammability and toxicity
- Weight and color
- Temperature range and hazardousness
- Flammability and temperature range
4: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above
5: R-22 is considered a(n)
- CFC
- HCFCH
- HCFC
- HFC
6: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.
- containing R-11, R-123 & R-717 exclusively shall not be prohibited
- shall not be prohibited
- of Group B2 refrigerant shall be prohibited
- shall be prohibited
7: Halogenated refrigerants cannot be used with what material?
- Copper
- Magnesium alloy
- Aluminum
- Stainless steel
8: The dial of a pressure gauge, when installed on the high side of a system be graduated 1.2 times the designed pressure.
- True
- False
9: What type of copper is not permitted on refrigeration systems?
- Type M
- Type L
- Type N
- Type K
10: A restaurant is classified as a
- commercial occupancy
- mixed occupancy
- public assembly occupancy
- large mercantile occupancy
11: Where a refrigeration or air conditioning system is installed,
- it shall not be operated below prescribed pressuers
- A field inspection shall be made before it is put into service
- The company who installed the system must notify the fire department in the jurisdiction where installed
- the form or certificate shall be authorized by the Department of Public Safety
12: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?
- Moisture indicator
- Foot valve
- Stop valve
- Muffler
13: R-123 belongs to Group
- A-3
- B-3
- B-1
- B-2
14: 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.
- 9.00'
- 7.00'
- 7.25'
- 8'4"
15: What must be done to all doors and access points in duct work going through a mechanical room?
- Must be hindged
- Must be screwed shut
- Must be sealed and gasketed
- All of the above
16: A 3-cubic foot receiver must have what type of relief valve?
- fusible plug
- relief valve
- rupture device
- none of the above
17: What would be the classification for Stop & Shop grocery store?
- Large mercantile
- Place of assembly
- Industrial
- Instituional
18: What type of pressure relief device is used on a CO2 system?
- Rupture disk
- Glove valve
- Fusible plug
- Gate valve
19: What type of material can't be used on the outlet of a relief valve?
- PVC
- Copper
- Stainless steel
- Magnesium alloy
20: What is not a requirement of a Class T machine room?
- Tight fitting doors
- Self-closing doors
- Fire hose connected to the building fire protection system.
- Automatic ventilation
21: What is a Category "M" fluid?
- A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily content
- A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and the designed temperature is between -20F to 366F
- A typical refrigerant used on newer air conditioning and heat pump systems
- Any fluid that exceeds 150 psig and has design temperatures over 366F
22: How much refrigerant can be stored in a mechanical room outside of the system?
- 200
- 150
- 330
- 100
23: 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
24: _____ and its alloys are suitable for use with ammonia systems.
- Magnesium
- Aluminum
- Zinc
- Copper
25: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.
- 100
- 50
- 350
- 550