ACR204-Unit 38 Test Questions (CRF) - Mr. Graham

When connecting round metal duct sections, a minimum of ___ self-taping sheet metal screws should be used.

• 3
• 2

• 4

• 5

The applied voltage (the voltage that the unit will actually be drawing) should be within ___% of the rated voltage of the unit.

• 10
• 7

• 5

• 3

A disconnect or shutoff switch should be installed within ____ feet of each unit and within sight of the unit.

• 25
• 20

• 15

• 10

18-4 low-voltage wire is ________.

• 18-gauge wire with 4 conductors inside
• 4-gauge wire with a current rating of 18 amps

• 14-gauge wire with a current rating of 4 amps

• 18-gauge wire, 4 total allowed in ½ inch conduit

An air conditioner in a climate with average humidity will collect about 3 pints of condensate per hour of operation for each ton of air-conditioning.

• True

• False

A _______ is located in an auxiliary drain pan and is wired in series with the low voltage power supply.

• float switch
• pressure switch

• delay timer

• auxiliary thermostat

Line sets come in standard lengths of _______.

• 25 feet and 50 feet
• 10 feet and 15 feet

• 15 feet and 35 feet

• 50 feet and 100 feet

Split-system equipment includes all components in one cabinet or housing.

• True

• False

The ____ is the fitting that connects the duct to the supply register.

• boot
• takeoff

• starting collar

• plenum

Round metal duct requires more clearance space than square or rectangular duct.

• True

• False