If the needle on the pressure gauge fluctuates erratically during a hydrostatic test, this indicates that _____
A) the pressure is too low B) the pressure is too high
C) there is air trapped in the system D) there is a leak
C
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The advantage of mercury relays is that each time the relay is used the contact is renewed, eliminating burning and pitting caused by an arc when connection is made or broken.
Answer the following statement true (T) or false (F)
What should you do if a dimension seems to be missing on the print you are reading?
a. Use a scale to measure the desired feature. b. Use math to calculate the missing dimension from given values. c. Use a caliper or micrometer to measure the feature. d. Consult with the engineer or drafter to determine the missing dimension.
A voltmeter is used to measure __________.
a. ammeter b. mega ohms c. continuity d. None of the above
This factor would NOT be one influence that initiates changes in heavy equipment machine design:
a. fuel efficiency b. weight reduction c. operator comfort d. emission reduction legislation