All of the following statements are true EXCEPT:
A. accessories often cause noises that can be mistaken for other problems.
B. a fan clutch on a coolant pump can cause a noise that sounds serious and is hard to pinpoint. A stethoscope can be used to listen to the noise.
C. to isolate noises from defective belt-driven parts or accessories, disconnect the drive belt and run the engine for a short time at idle.
D. belts are a common source of noise.
Answer: B
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Most reversing controllers contain ____________________ interlocks as well as electrical interlocks.
Fill in the blank(s) with the appropriate word(s).
The following scales and their notations are common to mechanical drawings:
A. FULL or 1:1 B. HALF or 1:2 C. QUARTER or 1:4 D. DOUBLE or 2:1 E. all of the above
Double-acting cylinders have the same piston area on both sides, so they can exert equal pressure in both directions.
Answer the following statement true (T) or false (F)
Which of the following functions are performed by the Schmitt trigger in a proximity detector?
A. amplification B. inverts the input signal C. provides switching action D. provides hysteresis E. both c and d