D3 EI07 Test 1

Which of the following is an electrical test equipment used to measure the electric current in circuits?

• voltmeters

• ammeters

• ohmmeters

• all of the above

Which of the following type of meters are simpler to read and many will automatically adjust to the correct current range?

• Complex

• Analogue

• Digital

• All of the above

· Using an analogue scale, the value of current often has to be __________________ .

• exact

• estimated

• both a and b

• none of the above

Ammeters have a __________ resistance so that they have little impact on the circuit in which they are placed.

• very high

• infinite

• very low

• none of the above

Which of the following electrical test equipment used to measure circuit voltages such as the supply voltage (e.m.f.) and the potential difference (p.d.) across individual components?

• Ohmmeters

• Ammeters

• Voltmeters

• Insulation Testers

An ideal (perfect) voltmeter has _________ resistance, so that it takes no current from the circuit.

• zero

• infinite

• very low

• all of the above

Voltmeters are connected in _________________ the component or circuit voltage to be tested.

• parallel

• series

• either a or b

• none of the above

Which of the following electrical test equipment that measures the resistance of a component or circuit placed between their probes?

• ohm meters

• insulation resistance testers

• volt metes

• ampere meters

Resistance measurements are always made with the circuit _____________________.

• energized

• switched off

• either a or b

• both a and b

The electrical resistance of an open circuit is ___________?

• infinity

• zero

• very low

• all of the above