electricity Flashcards
Unlike other commodities, electrical power is considered a ________ commodity.
Just in time
Hazardous
over rated
answer A
Rotating an electromagnet (rotor) across bars of wires (stator) produces which type of current?
Direct current
alternating current
electromagnetic
answer B
The American power system is operated at ________.
90 decibels
60 hertz
180 mph
answer B
Which electrical components stop the flow of electricity when the current reaches unsafe levels?
Circuit breakers
floor rails
stator coils
answer A
According to Ohm’s Law, what determines voltage (V)?
Voltage (V) equals current (I) divided by resistance (R).
Voltage (V) equals current (I) times resistance (R).
answer B
If the primary coil of a transformer has more turns of wire than the secondary coil, the voltage induced in the secondary is ________.
higher
lower
answer B
What is the term used for a network of electric power producers, transmission lines, transformers, and users?
Grid
Power station
answer A
An area where process motor switchgear are located
Staging room
motor control center
answer B
The most common voltage for electric motors in the chemical industry is:
4,160v
480v
120v
answer B
Which protective relay protects a circuit from back feed through the line?
An over-frequency relay
A reverse power flow relay
answer B
Excessive temperature situations may cause power shortages related to ________.
excessive customer usage
loss shedding
answer A
What is Process Technician’s primary interaction with the Electrical System?
Operating switchgear in the MCC for lockout/ tagout / tryout
Changing fuses in MCC
answer A
Electrical fireball is a term used to describe ________.
a gas explosion
an arc flash
answer B
How does deactivation equipment work during electrical maintenance work?
It provides an air gap between the equipment wiring and the power source.
It remotely de-energizes equipment prior to servicing.
answer A
What potentially hazardous material was banned in the United States in 1979, and where was it used?
The disposable filters used in air conditioners
The polychlorinated biphenyls (PCBs) previously used in transformer oils
answer B
Cogeneration means:
Producing both Steam and Electricity for consumers
Electricity from a Co-operative Utility Company
answer A
