Answer the following statement(s) true (T) or false (F)
1. When a DC motor starts, the generated counter emf across the armature is low.
2. A field accelerating relay is used with starters to control low-cost speed motors.
3. A field failure relay is a single-pole control relay.
4. Time limit acceleration has the disadvantage that the resistors might remain in the circuit and could burn out.
5. Time limit controllers can drive pumps, fans, and compressors.
1. TRUE
2. FALSE
3. TRUE
4. FALSE
5. TRUE
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Which of the following describes a ground fault?
a. The connection between two or more portions of the equipment grounding conductor b. An open connection between an electrical circuit or equipment and the earth c. A conducting connection between any of the conductors of an electrical system d. The unintentional, electrically conducting connection between an ungrounded conductor of an electrical circuit and the normally noncurrent-carrying conductors, metallic enclosures, metallic raceways, metallic equipment, or the earth
The hexadecimal number for 12 is ________
A) $B B) $A C) $C D) 12
In what way is a spud wrench different from a pipe wrench?
a. It is not adjustable. b. It has smooth jaws. c. It is significantly shorter. d. Using a handle extension is recommended.
A diode is tested with an ohmmeter. The ohmmeter indicates a reading of 4 W regardless of which way the ohmmeter leads are connected. The diode is probably ____.
A. okay B. open C. shorted D. a zener