Camshafts are being discussed. Technician A says cam journals rarely wear so they do not need to be reground. Technician B says reground cams are more expensive. Who is correct?
A. Technician A
B. Technician B
C. Both technicians
D. Neither technician
Answer: A
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A. ultraviolet rays B. infrared rays C. ionization D. refraction
Why are two sets of contacts (one set normally open and one set normally closed) needed on an indoor fan
relay? a. To allow high-speed operation in heating. b. To allow low-speed operation in cooling. c. To allow high-speed operation after a time delay. d. To ensure only one motor speed winding is energized at a time.
A(n) ____________________ is a voltage reference sensor that will change resistance in response to vacuum or pressure.
Fill in the blank(s) with the appropriate word(s).
What percentage of the sun's energy reaches Earth?
a. 1 percent c. 10 percent b. 5 percent d. 20 percent