Topics: ASHRAE/CMR
1: What type of material can't be used on the outlet of a relief valve?
- Stainless steel
- Copper
- Magnesium alloy
- PVC
2: There can be no airflow from an occupied space through a machine room unless what?
- System is high velocity
- System is ducted and sealed
- Duct is not located in the ceiling
- None of the above.
3: Halo-carbon refrigerants cannot be used with what material?
- Stainless Steel
- Magnesium alloy
- Aluminum
- Copper
4: What is an example of institutional occupancy?
- Shopping mall
- Dorms
- Football stadium
- Hospital
5: Ammonia belongs to Group
- B-1
- A-2
- B-2
- A-1
6: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?
- refrigerant sensing
- CO Sensing
- A group sensing
- phosgene gas sening
7: Fusible plugs shall not be used with pressure vessels of
- 15 cubic feet or more
- 3 cubic feet or less
- 3 cubic feet or more
- 15 square feet or less
8: Class T machine room
- shall have remote controls to stop the action of the refrigerant compressor
- shall include closets used for setting equipment
- shall have refrigerant leak detecting systems installed inside and outside the room
- has no flame producing apparatus permanently installed
9: 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'
- 7.25'
- 7.00'
- 8'4"
10: Large Mercantile occupancy is a premise or that portion of a premise where more than ____ persons congregate on levels above or below the street level to purchase personal merchandise.
- 100
- 250
- 400
- 350
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.
- 20
- 10
- 15
- 25
12: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
- Class M machinery room
- Class T machinery room
- Class A machinery room
- Class B machinery room
13: 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
14: When a receiver is greater than 3 cubic feet but less than 10 cubic feed, what is the minimum relief device required?
- fusible plug
- relief valve
- rupture disc
- all of the above
15: What section governs pressure vessels?
- Section ASHREA 34
- Section 1 ASHREA 15 ASME fired
- Section 8 ASHREA 15 ASME unfired
- OSHA
16: Pressure limiting devices are not required for systems containing less then ________ refrigerants.
- 22 lbs
- 13.9 lbs
- 6.6 lbs
- 44 lbs
17: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?
- Stop valve
- Muffler
- Foot valve
- Moisture indicator
18: How many refrigerant classifications are there for flammability?
- 3
- 1
- 7
- 2
19: R-410A is classified as a ____ refrigerant on the safety matrix.
- B-1
- B-2
- A-2
- A-1
20: Setting a pressure relief device shall not exceed ___ of the design pressure
- 75%
- 100%
- 90%
- 80%
21: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 80%
- 90%
- 100%
- 75%
22: The discharge relief valve is located (9.4.6)
- between the compressor and reciever
- between the compressor and the stop valve
- on top of the condensor
- between the compressor and oil separator
23: What must be done to refrigerant pipes before being buried ?(8.10.4)
- Insulated and installed in a pipe duct (Encased)
- Certified
- Leak checked
- Classifed
24: A Low-Probability System
- is a system highly likely to leak form a failed connection or component of such system
- is such that a leak of refrigerant from a failed connection can not enter the occupied 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 a failed connection will enter the occupied space
25: Joints in refrigeration piping must be _____ before being covered?
- Inspected
- Pressurized
- Insulated
- Leak tested