Q.1
The size of the earth or ground wire is based on the
Q.2
The objective of earthing or grounding is
Q.3
Factors on which soil resistance depends
Q.4
When earth fault occurs
Q.5
Average resistance of human body is
Q.6
Earth wire or ground wire is made of
Q.7
Average resistance of a human body is
  • 500 ohms
  • 1000ohms
  • 1500ohms
  • 2000ohms
Q.8
True or FalseAfter performing an insulation resistance test, the insulation was deemed low. This is perfect for the insulation
  • True
  • False
Q.9
True or FalseA continuity tester may be used when performing a polarity test.
  • True
  • False
Q.10
True or FalseThe Ohmmeter may be used for the continuity test
  • True
  • False
Q.11
True or FalseAll lamps are removed when carrying out an insulation resistance test.
  • True
  • False
Q.12
What test is done to find out if there are breaks in a circuit?
  • Voltage
  • Continuity
  • Resistance
  • Polarity
Q.13
The preferred method of testing RCD's are:
  • Built-in test button
  • Use of RCD Tester
  • Use of Multimeter
  • Use of Ohmmeter
Q.14
What is an earth electrode?
  • electrode that is connected to earth
  • material used for earthing
  • electrode connected to the circuit
  • electrode which is connected to the mains
Q.15
What is earthing?
  • connecting electrical machines to earth
  • providing a connection to the ground
  • connecting the electrical machines to the source
  • providing a source of current
Q.16
Fuse wire should possess
  • High specific resistance and high melting point
  • High specific resistance and low melting point
  • Low specific resistance and low melting point
  • Low specific resistance and high melting point
Q.17
Which of the following reduces the earth's resistivity
  • Salt
  • Lead
  • Copper
  • Earth
Q.18
A process that uses instruments to obtain readings or identify faults is one description of
  • Testing
  • Inspection
  • Spot Checking
  • Measurement
Q.19
A visual inspection of a new installation is carried out:
  • During the installation process
  • to detect open and short circuits
  • After all tests are completed
  • upon completion but before testing.
Q.20
Which of the following earthing systems has the path for earth leakage currents via the earth itself:
  • TN-S
  • TNC-S
  • TN-C
  • TT
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