A device that is designed to reach deep inside a machine, magnifies like a microscope, and has its own light
source is the optical _____.
a. comparator
b. borescope
c. telescope
d. camera
b
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The equivalent resistance of three resistors (each of resistance R) in series is
A. R/3 B. 3R/2 C. R D. 2R/3 E. 3R
Describe how datum precedence is established.
What will be an ideal response?
Which of the following statements about the thermostatic expansion valve is NOT true?
A. The TXV divides the high and low pressure sides of the refrigeration system. B. The TXV monitors the temperature of the evaporator outlet to adjust flow accordingly. C. The TXV uses an equalizer line to sense the pressure at the evaporator outlet. D. If the TXV loses the pressure signal from the sensing bulb it will go to a full open mode to prevent the evaporator from starving.
The component that turns the oil burner and blower on and off in response to external commands is the
_____. a. ignition transformer b. thermostat c. primary control d. magnetic oil flow valve