1 Flashcards
___can be generated
I. Electricity
II. Electrical energy
- Neither I nor I I
- Both I and II
- I only
- I I only
I I only
We’re conductors with an ampacity higher than the ampere rating or setting of the over current device are used the ___ shall determine the circuit rating
*Over current device
*Combined rating
*Conductor ampacity
*Derated ampacity
Over current device
Flexible cords and cable shall be protected by ___ where passing through holes in covers outlet boxes are similar enclosures
I. Fittings
II. Bushings
III. Tie wraps
Fittings and bushings
It is the intent of this code that factory installed internal wiring or the construction of equipment need not be inspected at the time of installation of the equipment, except to
I. Detect alteration
II. Detect damage
III. Detect insulation type
I and II only
A type of single phase motor that can be operated on either AC or DC is a ___motor
*Universal
*Multi-speed
*Repulsion induction
*Capacitor start
Universal
Brunch circuit conductors shall have an ampacity not less than
*The load increase by 125%
*100% of the load to be served
*80% of the load to be serve
*125% of the continuous load plus 80% of the non-continuous load
100% of the load to be serve
We’re lighting outlets are installed in interior stairways there shall be a wall switch at each floor level to control the lighting where the difference between a floor levels is ___ steps or more
. Four
. Eight
. Six
. Two
Six
a low power factor in an industrial plant is most likely cause by
[] lack of synchronous condenser
[] insufficient resistive loads
[] insufficient inductive load
[] excessive resistive loads
insufficient resistive loads
a type of AC motor that runs at a constant speed and is used for such pirpose as an electric clock motor is a ____ motor
[] ac induction
[] wound-rotor induction
[] ac squirrel cage
[] synchronus
synchronous
The phenomenon whereby a circuit sores electrical energy is called
[] susceptance
[] capacitance
[] resistance
[] inductance
capacitance
A voltage or current that is reversed at regular intervals is called___ voltage or current.
I. direct
II. steady state
III. sinusoidal
sinusoidal
A fixture that weighs more than ___ shall be supported independently of the outlet box
[] 25 pounds
[] 50 pounds
[] 75 pounds
50 pounds
In general motors are designed to operate in a maximum ambient temperature of __unless specifically designed for a higher temperature
. 50°Celsius
. 45° c
. 40° c
. 60° c
40° c
The power factor of an incandescent light bulb would be
. 0.7 lagging
. 0.7 leading
. Zero
. Unity
Unity
A low power factor in an industrial plant is most likely caused by
. Insufficient resistive loads
. Excessive resistive loads
. Lack of synchronous cond
. Insufficient inductive load
Insufficient resistive loads
