Topics: ASHRAE/CMR
1: Pressure vessels having an inside diameter of 6” or less shall be protected by
- a pressure relief device
- a fusible plug
- Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
- either a fusible plug or a pressure relief device
2: How many different groups of refrigerants are there?
- 11
- 15
- 7
- 3
3: What would be the classification of a prison?
- Institutional
- Place of assembly
- Industrial
- Large mercantile
4: What do you need to do when you install a new system?
- Add refrigerant
- Insulate the suction line before you take a superheat reading
- Document the superheat and subcooling reading
- Have it inspected
5: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
- public assembly occupancy.
- business occupancy
- commercial occupancy
- mercantile occupancy
6: When must refrigeration system covered by the code be inspected?
- Annually
- Annually and when installed
- Not required
- Upon installation
7: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
- Class T machinery room
- Class B machinery room
- Class A machinery room
- Class M machinery room
8: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- low pressure
- design pressure
- high pressure
- critical pressure
9: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8
- low side of the system
- high side of the system
- the vapor side of the system
- the liquid side of the system
10: Ammonia belongs to Group
- A-1
- B-2
- B-1
- A-2
11: pressure relief valves must discharge to the atmosphere at a location not less than 15 feet from ground level and ____ feet from any window, ventilation opening, or exits of buildings.
- 15
- 20
- 25
- 10
12: Institutional occupancy is
- a premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space.
- a premise or that portion of a premise from which, because they are disabled, debilitated, or confined, occupants cannot readily leave without the assistance of others.
- a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
- None of the above
13: What must be done to refrigerant pipes before being buried?
- Leaked checked
- Coated
- Certified
- Encased
14: What is the refrigerant dichlorodifluoromethane?
- R-22
- R-12
- R-134A
- R-123
15: A “U” or “UM” marking a on a nameplate of a pressure vessels signifies compliance with Section VIII of
- the ASME Boiler and Pressure Vessel Code
- Section 11.3.1.5 ASHRAE 15 Standard
- the ANSI Standard 10.7.2
- both the ANSI Standard 10.7.2 and ASHRAE 15 Standard 11.3.1.5
16: A class B2 refrigerant is considered
- non-toxic and highly flammable
- toxic and somewhat flammable
- toxic and non-flammable
- non-toxic and non-flammable
17: Ashrae states that the equipment on a building needs to conform to adjacent buildings classifications when within ____ feet from opening and intakes.
- 20
- 50
- 15
- 75
18: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.
- of Group B2 refrigerant shall be prohibited
- shall not be prohibited
- shall be prohibited
- containing R-11, R-123 & R-717 exclusively shall not be prohibited
19: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants
- higher
- the same
- there is no Group B1 refrigerants
- lower
20: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 800F
- 1000F
- 700F
- 600F
21: High pressure controls should be set no higher than
- 80% of set point
- 90% of set point
- 10% of set point
- 25% of set point
22: Class A refrigerants are considered
- non-toxic
- non-flammable
- toxic
- flammable
23: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 100%
- 75%
- 90%
- 80%
24: Direct systems using Group II refrigerants
- shall not be used for air condition for human comfort
- shall be installed per instruction of the AHJ
- shall be installed in Class T machinery rooms
- shall be allowed to be used for human comfort.
25: A pressure relief should be located at least _______ from windows and doors.
- 30'
- 25'
- 20'
- 15'