Which of the following is defined by UL as a device that trips when a fault current to ground is 6mA or more?

a. Class A
b. Class B
c. Class H
d. Class R


a

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A three-wire control circuit uses momentary contact, start-stop stations, and a holding circuit interlock connected ____ with the start button to maintain the circuit.

a. in tandem b. in parallel c. alternately d. in series

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What is the ideal temperature during the first four weeks of storage of hardwood cuttings?

A) 30-40°F B) 50-55°F C) 60-70°F D) 70°F or higher

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In ____________________ circuits, the current triangle is divided by the reference vector V to obtain the impedance triangle.

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

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Technician A says that at high altitudes, engines produce lower power. Technician B says that most engine control systems can compensate the air-fuel mixture for changes in altitude. Which technician is correct?

A) Technician A only B) Technician B only C) Both technicians D) Neither technician

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