Electrical Supplies and Systems Quiz P3 pt2

Quiz
•
Physics
•
Professional Development
•
Easy
Nigel Baker
Used 4+ times
FREE Resource
15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of the earth cable in an electrical system?
To regulate the frequency of the current
To reduce the power loss through power lines
To increase the voltage of the current
To provide a zero-volt path for potential fault current to flow to earth
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the frequency of the alternating current (AC) produced by the rotor turning at 3,000 revolutions per minute?
50 hertz
30 hertz
40 hertz
60 hertz
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of equipotential bonding in an electrical system?
To keep all extraneous metal parts at the same potential or voltage
To increase the current flow in the system
To reduce the frequency of the current
To regulate the voltage of the current
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a TN-C-S earthing system, where does the earth connection start?
At the consumer unit
At the outer sheathing of the supply cable
At the main earth terminal (MET)
At the incoming supplier's fuse, where it is connected to the neutral conductor
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of the transformer in the electrical generation process?
To increase the electromotive force (voltage) for distribution
To force the steam onto the vanes of the rotor
To measure the consumption of electricity
To heat the steam to power the turbines
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the voltage of a 230V supply entering a dwelling?
230V
400V
11kV
22,000V
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of the National Grid's sub-stations?
To increase the voltage of the electrical supply
To transform the electrical supply down to 11kV and distribute it to local sub-stations
To measure the consumption of electricity
To heat the steam to power the turbines
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