15. What is an electrotachometer?
What will be an ideal response?
An electrotachometer is a small, permanent, magnet generator connected to the motor shaft
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The purpose of the oil valve on an oil burner is to
A) flow to the nozzle stops when the burner shuts down B) provide a manual oil shutoff in case of emergency C) control the amount of oil entering the combustion chamber D) regulate the pressure that is delivered to the nozzle
Technician A says galvanic corrosion occurs when two dissimilar metals come into contact with each other. Technician B says an insulated steel bolt or one with a special coating can be used to hold two aluminum parts together. Who is correct?
A. Technician A only B. Technician B only C. Both Technicians A and B D. Neither Technician A nor B
A compressor takes 1.2 cu in of gas at a pressure of 14.7 psia and compresses it into a volume of 0.35 cu in. If the temperature of the gas remains the same, find the pressure of the gas in psia after it is compressed. Round the answer to the nearer hundredth psia.
Fill in the blank(s) with the appropriate word(s).
The proper documentation of control systems is essential if they are to be expediently serviced in the future. A universally accepted tool for such documentation is the ____.
a. microprocessor b. ladder diagram c. designer spreadsheet d. flow chart