HVAC-PP Randomized Final

At what degrees Fahrenheit below the desired evaporator outside surface temperature should the cut out pressure of a pressure motor control be set?

• 5
• 10
• 15
• 20

What is the applied voltage across an electric heater with a total current draw of 22 amperes and a resistance of 11 ohms?

• 230
• 240
• 242
• 248

An adjustable V-pulley for a belt drive motor is moved FURTHER from the other flange. This change will widen the pulley giving the effect of a smaller diameter pulley. The fan speed will

• decrease
• increase
• double
• triple

In order to balance the system pressure and crankcase in a hermitically sealed compressor unit what must be done?

• Shut system down.
• Install a thermostatic expansion valve.
• Cycle system several times.
• Service the evaporator.

Fabricating a 2 piece 90-degree welded turn using 4-inch NPS carbon steel pipe, what would be dimension A for this layout?

• 1.1875
• 1.75
• 2.25
• 2.78125
• Pg. 2-5

To find the Travel measurement in a common 45-degree offset, what formula would be used?

• Run X 1.000
• Offset X 1.000
• Offset X 1.414
• Spread X .414
• Pg. 4-1 & 4-2

How many threads per-inch is there for 1/2-inch nominal diameter steel pipe?

• 18
• 14
• 11.5
• 8
• Pg. 4-13

A 2,000-square foot dry cleaning area utilizing a Type II dry cleaning system requires a MINIMUM exhaust air of ___.

• 4,000 cfm
• 5,000 cfm
• 3,000 cfm
• 2,000 cfm

Heat exists down to absolute zero which is measured at a temperature of

• -400 degrees F
• -420 degrees F
• -440 degrees
• -460 degrees F

What controls the temperature difference between the cut-out and the cut-in settings in a temperature control mechanism?

• mercury switch
• range adjustment
• thermostatic adjustment
• differential adjustment control