
Principles of electrical science C&G 2

Quiz
•
Professional Development
•
Professional Development
•
Hard
Sayed Habib
Used 1+ times
FREE Resource
40 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
From a 50 metre cable drum, you have installed 13.6 metres of cable. What percentage of cable has been used?
3.8%
72.8%
27.2%
65%
Answer explanation
To find the percentage of cable used, divide the length used (13.6m) by the total length (50m) and multiply by 100. (13.6/50) * 100 = 27.2%
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
An insulation resistance tester is used to record the following values: 55MΩ, 72MΩ, 55MΩ, 18.5Ω, 10 MΩ and 89MΩ. What is the mean of these values?
49.9MΩ
89MΩ
55MΩ
18.5MΩ
Answer explanation
To find the mean, add all values together and divide by the total number of values. (55+72+55+18.5+10+89)/6 = 49.9MΩ. Therefore, the mean of these values is 49.9MΩ.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The SI unit for resistivity is?
Ohm
Ωm
R
Ω
Answer explanation
The SI unit for resistivity is represented by the symbol Ωm, where Ω is the unit for resistance and m is the unit for length.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Potential Difference is measured in?
Amps
Volts
Newton’s
Joule’s
Answer explanation
Potential Difference is measured in Volts, not Amps, Newton’s, or Joule’s.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the SI system, time is measured in?
Hours
Minutes
Seconds
Kelvin’s
Answer explanation
In the SI system, time is measured in seconds.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which instrument would be used to measure the resistance of a circuit?
Ohm meter
Conductance meter
Continuity meter
Amp meter
Answer explanation
An ohm meter is used to measure the resistance of a circuit, making it the correct choice for this question.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The SI unit for Capacitance is the?
Volt
Henry
Hertz
Farad
Answer explanation
The SI unit for Capacitance is the Farad.
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