Short-term fuel trim (STFT) adds or subtracts fuel to correct for:
A. Permanent changes.
B. Small or temporary changes.
C. Changes in the O2 sensor signal.
D. Both B and C
Answer: D
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A plumb line is aligned _____ .
A. horizontally with the surface of the earth B. vertically with the surface of the earth C. horizontally with the axis of the earth D. vertically with the axis of the earth
Which of the following are uses for a feeler gauge?
A. To measure clearance B. When used with a precision straightedge, to check the amount of warpage C. Both A and B D. Neither A nor B
The tangent of an angle in a right triangle is the adjacent side divided by the opposite side.
Answer the following statement true (T) or false (F)
What might be the problem if the furnace runs, but with short cycles?
A) Cracked heat exchanger B) Defective relay protector C) Improper heat anticipator setting D) Defective fan controller