NTTA questions - Electrical

Sample electrical questions


When fitting a relay in an electrical circuit it can?
A = a decrease the circuit voltage
B = reduce the amount of heave gauge wire that would otherwise be needed
C = do away with the need for a fuse in the circuit
D = increase the voltage in a circuit

In an electrical circuit which unit indicates the “resistance”?
A = watt
B = volt
C = ohms
D = amps

Which one of the following would affect the brightness of a lamp?
A = battery dimensions
B = battery voltage
C = bulb shape
D = lamp unit shape

What would be the total voltage in a circuit that has two six volt batteries connected in SERIES?
A = 3 volts
B = 6 volts
C = 12 volts
D = 24 volts

A starter motor solenoid is?
A = A brush carrier plate
B = a field coil winding retainer
C = a electro magnetic device
D = a communicator segment

What is the approximate voltage produced from ONE CELL of a Lead / Acid battery?
A = 2 volts
B = 4 volts
C = 6 volts
D = 12 volts

What minimum fuse rating is needed for a 12 volt circuit with just one 48 watt bulb?
A = 0.4 Amp
B = 2.0 Amp
C = 3.0 Amp
D = 4.0 Amp

For vehicle wiring, the expression "Earth Return" means?
A = the circuit earths to ground via the vehicle wheels or an earth strap
B = all circuits must have over load cut-out switches
C = relays are needed on all circuits
D = the vehicle body or chassis is a part of the circuit


The beam image pattern emitted by some modern headlamps is determined by?
A = its lens
B = the supply voltage
C = the circuit amperage
D = its height from the ground

An alternator has a diode rectifier for?
A = boosting voltage
B = cooling
C = converting output to AC
D = converting output to DC