Two technicians are discussing vacuum brake boosters. Technician A says that when the engine is running and the driver's foot is off the brake pedal, a vacuum is present on both sides of the booster diaphragm. Technician B says that when the brakes are in the applied position, vacuum is present on the front side of the diaphragm. Which technician is correct?
A) Technician A only
B) Technician B only
C) Both technicians
D) Neither technician
C
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Electric heat tracing of pipe is done for freeze protection and _____.
a. to eliminate pipe maintenance b. to eliminate standard thermal insulation c. to provide a grounding conductor d. for temperature maintenance of process fluids
When a set of wet liners has evidence of severe cavitation, which of the following maintenance and operating practices should be investigated first?
A. idle shutdown duration programming B. road speed governing C. type of antifreeze used and service intervals D. type of engine oil used and service intervals
If a square wave input produces 0 V output from an RC integrator, ________
A) the capacitor is open B) the resistor is open C) the capacitor is leaky D) the resistor is shorted
A copper tube should not be deburred after cutting when _____
A) a tubing cutter is used B) the tubing is being used for water piping C) the tubing is being used for refrigerant piping D) the resulting particles cannot be removed from the tubing