Which of the following is a probable cause of relay-controlled equipment failing to start when the contactor is closed?
a. excessive residual magnetism
b. one contact not closing
c. a grounded coil
d. gummy deposits
b. one contact not closing
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How much vacuum must a fuel oil pump produce to lift fuel oil up 6 ft?
A) 6 ÷ 2 = 3 in of vacuum B) 6 ÷ 3 = 2 in of vacuum C) 6 × 1 = 6 in of vacuum D) 6 × 2 = 12 in of vacuum
In a print, a list of all the parts required to fabricate an object would be found in the _____
a. bill of materials b. exploded view c. local notes d. title notes
A major application for Digital Signal Processing is in filtering and conditioning:
A) analog signals. B) square waves. C) digital signals. D) binary numbers.
This electrical component allows current to flow in only one direction and operates similar to a check valve
A) Diode B) Semiconductor C) Capacitor D) Bleed resistor