A diac is used to trigger __________.
A. an SCR
B. a UJT
C. a triac
Answer: C
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When using a scan tool to diagnose an AC system, where are any AC related trouble codes usually found?
A) Powertrain control module (PCM B) Body or chassis systems C) Read out in the navigation screen D) In the driver information center (instrument cluster)
What causes the nitrogen and oxygen in the air to combine and form NOx?
A) Sunlight B) Any spark will cause this to occur C) Chemical reaction in the catalytic converter D) Heat above 2,500 F (1,370 C)
When checking the resistance of the compressor start winding, the technician's multimeter shows 3.1 ?. This indicates that:
A) The winding has continuity and is good. B) The winding is shorted. C) The winding is grounded. D) The winding is open.
In refrigeration and air conditioning, switches are normally wired:
A) In either series or parallel with the load they control. B) In series with the load they control. C) In parallel with the load they control. D) In parallel with the power supply.