WorksheetsAdiabatic Equations Quiz
Total questions: 15
Worksheet time: 8mins
What is the tabulated size for an earth conductor that is installed with live conductors of csa 25 millimeters?
20 millimeters
25 millimeters
16 millimeters
30 millimeters
A circuit protective conductor is to be installed in a final circuit with a disconnection time of 0.4 seconds. The fault current will be 340 amps and assume the k factor to be 115. What is the minimum size of copper conductor to be selected?
4 millimeters
6 millimeters
8 millimeters
10 millimeters
What does the letter 's' represent in the adiabatic equations?
Temperature
Time
Size
Current
What is the meaning of the letter 'i' in the adiabatic equations?
Time
Size
Temperature
Fault current
What is the purpose of adiabatic equations for electricians?
To analyze power factor
To predict temperature changes in cables
To determine fault current
To calculate voltage drop
What is the equation to determine the time that a cable takes to reach its limiting temperature?
t = k / s * i
t = k * s / i
t = k^2 * s^2 / i^2
t = k + s - i
What is the equation to determine the minimum size conductor to not overheat?
s = k^2 * t / i
s = k / t + i
s = k / t * i
s = k * t / i^2
What is the purpose of using a lookup table in adiabatic equations?
To select the size of the earth conductor
To find the size of the live conductors
To determine cable insulation
To calculate fault current
What is the limiting temperature for thermoplastic cables?
50 degrees centigrade
100 degrees centigrade
70 degrees centigrade
90 degrees centigrade
What is the limiting temperature for thermal setting cables?
70 degrees centigrade
80 degrees centigrade
100 degrees centigrade
90 degrees centigrade
What is the square root of 207936?
536
496
456
416
What is the square root of 25?
5
4
3
6
What is the square root of 144?
12
10
14
16
What is the square root of 625?
20
25
30
35
What is the square root of 1296?
40
36
44
32
