A heating and cooling system will operate properly using jumper wires to manually complete the control circuits at the low-voltage thermostat, but the system will not operate with the jumper wires removed, the is the likely cause of the malfunction. Contactor Control transformer Thermostat Control wiring 147 Multiple Choice 1 point How many poles will a circuit breaker need to supply power to a 240-volt single-phase condensing unit? O One pole Four poles Two poles O Three poles 148 Multiple Choice 1 point A motor with a rating of 15 full load amps is protected by a line voltage overload that keeps opening at a current draw of 14 amps, indicating the overload is Good Weak Shorted Too large for the motor 149 Multiple Choice 1 point Which of the following disconnect switches can be used on a condensing unit with a full-load amperage rating of 45 amps? O 30 amp disconnect 50 amp disconnect 60 amp disconnect O 45 amp disconnect 150 Multiple Choice 2 points Which of the following components can be checked in a packaged unit if the technician positions the fan switch on the thermostat to the "Fan On" position? Compressor Crankcase heater Transformer O Condenser fan motor