Topics: ASHRAE/CMR
1: Class 3 refrigerants are
- non-toxic
- highly flammable
- toxic
- non-flammable
2: A class B1 refrigerant is considered
- toxic and somewhat flammable
- non-toxic and non-flammable
- toxic but non-flammable
- non-toxic but highly flammable
3: An example of direct system is
- rooftop unit
- chiller
- absorber
- none of the above
4: NH3 is
- ammonia
- lithium bromide
- R-718
- R-508A
5: What refrigerant is an inorganic compound?
- R-22
- R-410A
- R-132A
- Ammonia
6: Name a CFC refrigerant(s):
- R-11
- R-12
- R-123
- both a & b
7: Where must a refrigeration contractor's license number be displayed?
- Trucks, license plates, and uniforms
- Trucks, invoices, and advertising
- Uniforms, checks, and invoices.
- Truck, office, every job, and on all equipment
8: Ammonia (NH3) is a group III refrigerant
- True
- False
9: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
- the outdoors
- the mechanical room housing the refrigeration system
- Machinery rooms need not be vented
- the return air ducted system
10: What must be done to refrigerant pipes before being buried?
- Encased
- Leaked checked
- Coated
- Certified
11: R-22 is classified as a ____ refrigerant on the safety matrix.
- B-1
- A-1
- A-2
- B-2
12: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- high pressure
- low pressure
- critical pressure
- design pressure
13: What refrigerant doesn't have to be classifted?
- R-711
- R-718
- R-717
- R-134a
14: What type of material can't be used on the outlet of a relief valve?
- Copper
- PVC
- Magnesium alloy
- Stainless steel
15: Name an HCFC refrigerant(s):
- R-22
- R-123
- R-11
- both a & b
16: What pipe can not be used for refrigeration?
- M
- K
- N
- L
17: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere
- 6.6
- 330
- 110
- 1,000
18: What refrigerant were phased out in 2004?
- R-12
- R-134a
- R-11
- R-22
19: When must refrigeration system covered by the code be inspected?
- Annually
- Upon installation
- Not required
- Annually and when installed
20: How many refrigerant classifications are there for flammability?
- 2
- 1
- 7
- 3
21: How many gallons of water do you need per pound of ammonia?
- 50
- 100
- 10
- 1
22: Class A refrigerants are considered
- toxic
- flammable
- non-toxic
- non-flammable
23: High pressure controls should be set no higher than
- 90% of set point
- 10% of set point
- 25% of set point
- 80% of set point
24: A declaration test is needed when the system contains more than
- 110 lbs
- 65 lbs
- 120 lbs
- 55 lbs
25: Indirect systems using Group II refrigerants
- shall be used for mechanical equipment only
- shall have all refrigerant containing parts except piping, installed in a Class T machine room
- shall be used in refrigeration system in excess of 1,000 lbs
- shall be used in refrigeration system less than 1,000 lbs