If the safety reset on an oil furnace primary control is tripped:
A) Nothing on the furnace will operate.
B) The ignition transformer will not operate.
C) It will automatically reset on the next call for heat.
D) The burner motor will not operate.
[Ques. 2] Coil corrosion that results from two dissimilar metals coming in contact with an electrolyte is called:
A) General corrosion. B) Galvanic. C) Hygroscopic. D) Electrolytic.
[Ques. 3] One advantage that steam systems have over hot water systems is that steam systems do not require:
A) TXV valves. B) Circulating pumps.
C) Bypass valves. D) Compressor unloaders.
[Ques. 4] How is the subcooling of an air-conditioning system affected by a restriction in the liquid line?
A) The subcooling will be below normal.
B) The subcooling will be above normal.
C) The subcooling will not be affected by a low refrigerant charge.
D) The subcooling will fluctuate erratically.
[Ques. 5] When changing a low-voltage transformer, the service technician should:
A) Use a replacement transformer with a higher VA rating to make it last longer.
B) Check all low-voltage controls for shorts and grounds.
C) Use a replacement transformer with a higher-voltage primary winding to make it last longer.
D) Temporarily short across the secondary side of the transformer to test its output.
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