Topics: All categories in the pool
1: Watt's Law indicates Volts X Amps = _________.
- Resistance
- Ohms
- Current
- Watts
2: If air is present in an absorption chilled water appliance, which of the following will most likely occur?
- The Li-Br solution will become more concentrated
- System operating pressure will drop
- Rust can form
- The Li-Br solution will become more diluted
3: How far from the window does a relief valve need to be according to ASHRAE-15?
- At least 20'
- At least 40'
- There is no minimum for relief valve and windows.
- At least 30'
4: If a condenser is on a roof and the temperature is 35F and dropping the capacity
- increases
- decreases
- run as designed with low ambient controls
- doesn't change
5: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code
- over pressure protection
- Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
- over pressure protection as well as a temperature protection device
- over pressure protection and a rupture disc
6: What type refrigerant is NOT ozone depleting?
- HCFC
- Halon
- CFC
- HFC
7: Materials used in construction and installation materials used in the manufacture or installation of refrigerating equipment shall be suitable for conveying refrigerant and the refrigerant oils and will not deteriorate in the presence of what?
- Air and dirt
- Moisture and air
- Water and soap
- Oil and water
8: Which oil is hydoscopic?
- SW30
- animal
- polyolester
- mineral
9: Booster compressors connect to the ____ side of the compressor
- low side
- liquid
- oil side
- vapor
10: What section governs pressure vessels?
- OSHA
- Section 1 ASHREA 15 ASME fired
- Section 8 ASHREA 15 ASME unfired
- Section ASHREA 34
11: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?
- refrigerant sensing
- A group sensing
- phosgene gas sening
- CO Sensing
12: A machine room with a refrigerant system using ammonia shall
- be provided with a continuously operated ventilation system
- be considered a non-hazardous location in accordance with National Electrical code
- have no flame producing apparatus permanently installed and operated
- All of the above
13: On a TXV, the purpose of an external equalizer is to?
- compensate for a pressure drop across the evaporator coil
- balance the evaporator load
- allow a greater adjustment spam
- Increase the pressure on the top of the power head diaphragm
14: How many groups of refrigerants are there?
- 3
- 7
- 1
- 5
15: Megaohm meter's main function is
- to detect weak motor winding insulation of a refrigeration or air conditioning compressor by creating high DC voltages to the compressor
- to detect very high resistances to ground of refrigeration or air conditioning compressors
- to test very high value capacitors for large 3-phase refrigeration compressors and blower motors.
- Both a and b are correct
16: Bubbles in the liquid line sight glass could be caused by
- plugged drier
- overcharge of oil
- leaking discharge valves in the compressor
- bad low pressure switch
17: How many closing forces operate a thermostatic expansion valve?
- 1
- 3
- 4
- 2
18: How many square inches per square foot?
- 24
- 144
- 98
- 64
19: What must be done if refrigeration lines pass through a concrete floor?
- leak checked
- installed through a pipe casing
- moisture barrier
- insulated
20: A High-Probablity system
- is such that a leak of refrigerant from failed connections will enter the unoccupied space
- is a system highly likely to leak from a failed connection or component of such system
- is such that a leak of refrigerant from failed connections will enter the occupied space
- is such that any leak will cause injury or death to anyone within a 100 square foot area
21: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
22: 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
23: On a centrifugal compressor, stationary diffuser vanes are needed to
- increase the clearance space
- stop gas flow
- convert velocity energy to pressure
- prevent high pressure on the packing
24: What would be the classification for Stop & Shop grocery store?
- Industrial
- Instituional
- Place of assembly
- Large mercantile
25: The instrument used to measure the specific gravity of absorption chiller solutions is the
- anemometer
- refractometer
- Psychrometer
- hydrometer