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
You might also like to view...
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
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
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).
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