What is often the first indication of a problem in an engine?

A. Vibration
B. Leaks
C. Abnormal sounds
D. Excessive heat


A. Incorrect. Abnormal sounds are often the first indication of problems.
B. Incorrect. Abnormal sounds are often the first indication of problems.
C. Correct. Abnormal sounds are often the first indication of problems.
D. Incorrect. Abnormal sounds are often the first indication of problems.

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Name two conditions where it is not possible to start a motor across-the-line.

What will be an ideal response?

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What will be an ideal response?

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A resistive load of 5 ? is connected to an ac source of 120 V (rms) through an SCR circuit.

a. If the SCR circuit consists of a single SCR, and if the triggering angle is adjusted to 30o, calculate the power consumption of the load. b. If the SCR circuit consists of two back-to-back SCRs, calculate the power consumption of the load assuming that the triggering angle is kept at 30o

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Microbial metabolism in the guts of termites and in waterlogged soils are two major sources of excess methane that is contributing to the global greenhouse effect

Indicate whether the statement is true or false

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