Topics: ASHRAE/CMR
1: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
2: A pressure relief should be located at least _______ from windows and doors.
- 30'
- 15'
- 20'
- 25'
3: How far from the ground does a relief valve need to be?
- Not more than 3' above grade
- At least 20' above grade
- At least 25' above grade
- At least 15' above grade
4: The 522 CMR 9.00 has adopted for reference ASHRAE ____
- 15
- III
- 25
- 10
5: A 3-cubic foot receiver must have what type of relief valve?
- fusible plug
- relief valve
- rupture device
- none of the above
6: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- make sure it's compatible, notify owner, notify A.H.J
- place sign, check for leaks, insulate
- you can't change refrigerants
- nothing must be done
7: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code
- over pressure protection as well as a temperature protection device
- over pressure protection and a rupture disc
- over pressure protection
- Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
8: What is Trichlorotrifluoromethane?
- R-13
- R-11
- R-113
- R-12
9: What must be done to refrigerant pipes before being buried?
- Encased
- Leaked checked
- Coated
- Certified
10: Class A refrigerants are considered
- non-flammable
- toxic
- non-toxic
- flammable
11: When an inspection is needed, how often must it be done?
- every 24 months
- every 18 months
- annually
- every 36 months
12: Who is permitted to access a refrigeration machine room?
- Contractors only
- Anyone, it's a completely safe area
- Any employee
- Authorized persons only
13: 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
14: Which of the following is an inorganic refrigerant?
- R-22
- Ammonia
- Chlorofluorocarbons
- All of the above
15: What must be done if refrigeration lines pass through a concrete floor?
- insulated
- moisture barrier
- installed through a pipe casing
- leak checked
16: All serviceable components of a refrigeration system shall be provided with
- name plates with markings referring to pressure and temperature in accordance with ASME Boiler and Pressure Vessel Code
- manufactures instructions on start-up procedures
- service manuals
- safe access
17: What type of relief valve is used on a CO2 system?
- rupture disc
- fusible plug
- glove disc
- gate valve
18: How many refrigerant classifications are there for flammability?
- 2
- 1
- 3
- 7
19: What is a Category "M" fluid?
- 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
- Any fluid that exceeds 150 psig and has design temperatures over 366F
- A typical refrigerant used on newer air conditioning and heat pump systems
- A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily content
20: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.
- ammonia
- CFC-11
- Lithium bromide
- HCFC-123
21: According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into
- the low-pressure side of the system
- the high side of the system
- the liquid receiver
- both a and c are correct
22: A declaration test is needed when the system contains more than
- 65 lbs
- 120 lbs
- 55 lbs
- 110 lbs
23: How much clearance do you need around the perimeter of electrical panels?
- 24"
- 36"
- 18"
- 12"
24: Can you use Ammonia in industrial applications?
- Yes, always
- Yes, Under certain condidtions
- When mixed with R-718
- No, never
25: Which occupancy can ammonia be used in?
- commercial
- depends on the quantity of freon
- redifential
- industrial