Which of the following is used to check the rotating speeds of motors?

a. Insulation resistance tester
b. Tachometer
c. Spring tension scale
d. Stethoscope


b. Tachometer

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The quality of irrigation water can be measured by determining: ________, ________, and ________.

Fill in the blank(s) with the appropriate word(s).

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In general, large crossfeed movements combined with small downfeeding movements are preferred

Indicate whether the statement is true or false

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Convert decimal 64 to octal

A) 1008 B) 768 C) 778 D) 1048

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What is valve margin?

A. The dimension between the valve seat and the flat face of the valve head mushroom. B. The ratio of the total valve head surface to seat surface. C. The outer diameter of the valve head. D. The length of the valve stem.

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