The signal that represents the difference between the control signal and the feedback signal is called the ____.
A. feedback signal
B. error signal
C. reference signal
D. sawtooth signal
Answer: B
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?Mechanical forces that can affect materials are measured by the formula, Force = Mass x ____.
A. ?height B. ?weight C. ?acceleration D. ?pressure
Technician A says cryogenic reefers units have a heavy carbon footprint and ODP rating. Technician B says that R-22 has been approved for use in refrigerated trailers until the year 2020. Who is correct?
A. Technician A only B. Technician B only C. Both A and B D. Neither A nor B
When multiplying decimal fractions, count the total number of places to the right of the decimal point. In your answer, place a decimal point exactly the same number of places or the left of the ____________________ digit of the answer.
Fill in the blank(s) with the appropriate word(s).
____ is used to remove defective welds and to prepare a thick metal joint so that a full penetration weld can be made.
A. Washing B. Gouging C. U-grooving D. Water jet cutting