J194 theory 1

An insulation resistance meter is otherwise known as a:

• Multimeter

• Megger

• 500V Tester

• Tong tester

The resistance of an open circuit would be approximately:

• Zero ohms

• infinite ohms

• 10 ohms

• 200 ohms

If the resistance of a circuit is doubled, and the voltage remains the same, the

power consumption of that circuit is:

• doubled

• increased 4 times

• halved

• decreased 4 times

Apart from testing the battery, all insulation testers must be:

• stored out of sunlight

• zeroed prior to use

• of an approved model

• scaled prior to use

The ranges for testing insulation resistance are generally:

• 12V, 230V & 400V

• 24V, 240V & 415V

• 200V, 500V & 1000V

• 250V, 500V & 1000V

When an increase in temperature causes a decrease in resistance, the

resistor possesses a:

• low temperature coefficient of resistance

• high temperature coefficient of resistance

• positive temperature coefficient of resistance

• negative temperature coefficient of resistance

As the temperature of a light filament increases, the current in the filament

will:

• decrease

• increase

• continually change

• remain the same

Resistance of a cable is directly proportional to the:

• cross sectional area

• length of the cable

• temperature of the cable

• conductor resistivity

If a short circuit occurs in the parallel branch of a series / parallel resistive

circuit the:

• total circuit resistance will drop to zero

• total circuit resistance will increase

• total circuit current will increase

• total circuit current will decrease

If an open circuit occurs in the series branch of a series / parallel resistive

circuit the

• (a) total circuit current will drop to zero

• (b) total circuit current will increase

• (c) total circuit resistance will drop to zero

• (d) total circuit resistance will decrease