Topics: All categories in the pool
1: A relief valve shall be located at least ___ above grade.
- 10'
- 15'
- 25'
- 36'
2: Which of the following controllers would you expect to be most sensitive to temperature changes?
- line voltage t-stat
- aquastat
- low voltage t-stat
- immersion controller
3: A chilled water pump suction gauge reads 10 psig. Discharge gauge reads 48 psig. The head in feet of the pump is working against
- 116
- 88
- 108
- 38
4: In an electrical circuit, what is potential measured in?
- Volts
- Herys
- Ohms
- Amps
5: "E" references ____ in the Ohm's law formula
- resistance
- amperage
- voltage
- capacitance
6: The outer portion of shell of the compressor used on low-pressure chillers is called the
- volute
- nozzle
- suction
- baffle
7: Heat is a form of
- matter
- work
- power
- energy
8: What is a Category "M" fluid?
- A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily content
- Any fluid that exceeds 150 psig and has design temperatures over 366F
- 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
- A typical refrigerant used on newer air conditioning and heat pump systems
9: R-11 belongs to Group
- A-2
- B-3
- A-1
- B-1
10: Pressure vessels with an internal volume of 3 cubic feet or more
- do not need pressure relief protection
- shall use pressure relief devices or fusible plugs
- shall use pressure relief devices
- shall use fusible plugs
11: Ashrae states that the equipment on a building needs to conform to adjacent buildings classifications when within ____ feet from opening and intakes.
- 50
- 15
- 20
- 75
12: Ammonia vaporization takes place at what temperature?
- -110F
- -460F
- -32F
- -28F
13: Which refrigerant class listed below is the most flammable?
- A3
- B2
- A2
- C3
14: How do you find net oil pressure on a compressor?
- discharge pressure - suction pressure
- gross oil pressure - suction pressure
- gross oil pressure - discharge pressure
- all of the above
15: Capacitors are rated in
- volt - amperes
- micro-farads
- megaohms
- kelvins
16: 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
17: How far from the ground does a relief valve need to be?
- At least 25' above grade
- Not more than 3' above grade
- At least 20' above grade
- At least 15' above grade
18: Which of the following types of oils are hygroscopic?
- polyolester (POE)
- polyalkylene glycol (PAG)
- naphthene mineral
- both a and b
19: What would be the classification of a church?
- Place of assembly
- Institutional
- Large mercantile
- Industrial
20: Refrigerant restricted in 2004 but used for transition for decades:
- R-22
- R-123
- R-11
- R-134A
21: What device should be used on low-temperature freezers?
- discharge muffler
- high capacity TXV
- hot-gas by-pass
- oil separator
22: Total heat of a substance is considered
- specific heat
- empathetical
- enthalpy
- sensible heat
23: Low pressure chiller systems use what type of compressor?
- Centrifugal
- Reciprocating
- Screw
- Scroll
24: A restaurant is classified as a
- commercial occupancy
- public assembly occupancy
- large mercantile occupancy
- mixed occupancy
25: 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