Topics: ASHRAE/CMR
1: What pipe can not be used for refrigeration?
- L
- K
- N
- M
2: 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
3: Pressure vessels having an inside diameter of 6” or less shall be protected by
- either a fusible plug or a pressure relief device
- a pressure relief device
- Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
- a fusible plug
4: Which refrigerant replaced R-12?
- R-22
- R-134A
- R-410A
- R-407A
5: A 3-cubic foot receiver must have what type of relief valve?
- fusible plug
- relief valve
- rupture device
- none of the above
6: Can you use Ammonia in industrial applications?
- Yes, Under certain condidtions
- No, never
- When mixed with R-718
- Yes, always
7: A High-Probablity system
- is such that a leak of refrigerant from failed connections will enter the unoccupied space
- is such that any leak will cause injury or death to anyone within a 100 square foot area
- is such that a leak of refrigerant from failed connections will enter the occupied space
- is a system highly likely to leak from a failed connection or component of such system
8: Pressure vessels with an internal volume of 3 cubic feet or less
- do not need pressure relief protection
- shall use pressure relief devices or fusible plugs
- shall use fusible plugs
- shall use pressure relief devices
9: Ashrae states that the equipment on a building needs to conform to adjacent buildings classifications when within ____ feet from opening and intakes.
- 75
- 50
- 15
- 20
10: Who authorizes changes to the safety codes?
- Person in charge of the facility
- Person who pulled the permit
- Board of Boilers
- Contractor who last serviced the system.
11: How much refrigerant can be stored in a mechanical room outside of the system?
- 200
- 100
- 330
- 150
12: The main cause of enacting the "no vending rule" of July 1st 1992 was
- global warming potential
- ozone depletion
- both a & b
- None of the above
13: What is a Category "D" fluid?
- Any fluid that exceeds 150 psig and has design temperature of over 366F
- A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily contact
- A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and design temperature is between -20F to 366F
- A typical refrigerant used on newer air conditioning and heat pump ssytems
14: Class A refrigerants are considered
- non-toxic
- toxic
- flammable
- non-flammable
15: Joints in refrigeration piping must be _____ before being covered?
- Inspected
- Insulated
- Leak tested
- Pressurized
16: The gauge thickness required on a CO2 tank construction is
- 1/16"
- 5/16"
- 3/32"
- 1/8"
17: Ammonia (NH3) is a group III refrigerant
- True
- False
18: What section of ASHRAE-15 governs pressure vessels?
- Section 6 ASHRAE-34 ASME VIII unfired
- Section 7 ASHRAE-15 ASME VIII fired
- OSHA
- Section 9 ASHRAE-15 ASME VIII unfired
19: R-123 belongs to Group
- A-3
- B-2
- B-3
- B-1
20: What is Trichlorotrifluoromethane?
- R-11
- R-13
- R-113
- R-12
21: 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
22: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.
- 48
- 18
- 24
- 36
23: What section governs pressure vessels?
- Section 1 ASHREA 15 ASME fired
- Section ASHREA 34
- OSHA
- Section 8 ASHREA 15 ASME unfired
24: Fusible plugs must have what marked on them?
- Melting temperature in F
- Melting temperature in C
- Opening pressure
- All of the above
25: _____ and its alloys are suitable for use with ammonia systems.
- Aluminum
- Copper
- Magnesium
- Zinc