Topics: All categories in the pool
1: What does an anemometer measure?
- voltage
- temperature
- amperage
- velocity
2: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 24
- 18
- 10
- 15
3: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
- 2.5
- 5.5
- 3.0
- 2.0
4: What type of pressure relief device is used on a CO2 system?
- Rupture disk
- Gate valve
- Fusible plug
- Glove valve
5: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
- commercial occupancy
- public assembly occupancy.
- mercantile occupancy
- business occupancy
6: What section of ASHRAE-15 governs pressure vessels?
- Section 7 ASHRAE-15 ASME VIII fired
- Section 6 ASHRAE-34 ASME VIII unfired
- Section 9 ASHRAE-15 ASME VIII unfired
- OSHA
7: What is the boiling point of refrigerant governed by?
- Evaporator temperature
- P&T relationship
- Compressor RPM's
- Condenser sub-cooling
8: What is not a requirement of a class T machine room?
- fire hose connection to the building fire protection system
- tight fitting doors
- self-closing doors
- automatic ventilation
9: On a centrifugal compressor, stationary diffuser vanes are needed to
- stop gas flow
- convert velocity energy to pressure
- prevent high pressure on the packing
- increase the clearance space
10: Secondary refrigerants are usually
- water or brine
- Prestone anti-freeze
- alcohol
- expensive
11: What are the three components of a transformer?
- Contacts, secondary coil, and core
- Primary coil, secondary coil, and core
- Primary coil, secondary coil, and copper contacts
- Primary core, secondary coil, and high and low voltage connectors.
12: The solution that leaves the concentrator in an absorption chiller is referred to as the
- weak solution
- diluted solution
- strong solution
- absorbed solution
13: 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
- 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
- Any fluid that exceeds 150 psig and has design temperatures over 366F
14: one BTU equals
- 12,000 hp
- 31.4 hp
- 3.41 hp
- Pi
15: The two float-type metering devices are the
- liquid float and the low-side float
- vapor float and the low-side float.
- high-side float and the low-side float
- liquid float and the vapor float
16: What's the purpose of a megohmmeter?
- To measure low to very low resistance values
- To alternate the current in a DC circuit in order to calculate the total impedance of a circuit
- To measure very high resistances
- None of the above
17: A hotel is considered a _______ occupancy.
- residential
- mercantile
- commercial
- institutional
18: On a single phase motor, when does the start winding cut out?
- At 50% of its full rated speed
- Start windings do no cut-out of the run cycle
- At 25% of its full rated speed
- At 75% of its full rated speed
19: Which oil is hydoscopic?
- polyolester
- SW30
- animal
- mineral
20: Heat is a form of
- power
- work
- energy
- matter
21: 1 HP = ____ Watts?
- 3.1416
- 3,412
- 746
- 11,239
22: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code
- 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
- over pressure protection as well as a temperature protection device
23: A solder joint melts at temperatures of
- less than 400F
- 600F to 900F
- 400F to 800F
- 1,200F to 1,500F
24: Copper and its alloys shall not be used with ammonia
- True
- False
25: Volts x amps equals
- Inductance
- Watts
- Impedance
- Ohms Law