A pressure of 100 microns has been reached with the vacuum pump operating. The pump is turned off and the gauge reading rises to 500 microns and stays there. What does this indicate?
What will be an ideal response?
The system is leak tight and moisture free.
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At which drawing level do dimensions and tolerances apply?
What will be an ideal response?
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The stationary magnet of a DC motor is represented by the _____.
a. armature b. field poles c. commutator d. rotor
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When a reduction catalytic converter is used on a current diesel engine, which of the following emissions would it be attempting to minimize?
A. NOx B. CO C. carbon dioxide D. sulfur dioxide
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When should gauges be installed on small critically charged systems?
A) Whenever the system is checked B) Only when other diagnostic means have been exhausted C) Routinely, at least every year D) Monthly to insure the charge is still correct
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