Adiabatic Equations Quiz

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