Lv3 electrical 457

Which is the normal number of volts a lead acid battery cell produce?

• 1.80

• 2.10

• 2.99

• 3.30

An ammeter cannot be connected in parallel across a battery because

• The lead colours don’t match

• It has a high resistance

• The resistance will be too high and an incorrect reading may occur

• The resistance will be too low and cause meter fuse to blow

The main reason for fitting a relay or solenoid to an electrical circuit connected to a heavy load is to

• Provide an audible warning that a circuit is operating

• Provide a suitable mounting for heavy items

• Contain a larger fuse than normal

• Allow a low current to operate a high current circuit

When receiving a digital signal which one of the following will an ECU do first?

• Initiate a functional test

• Rectify data errors

• Check the address

• Send a reply

When working on a hybrid vehicle engine, you must do what first?

• Remove the key and leave in the vehicle

• Remove the key and leave in your pocket

• Remove the key and leave it at a out of signal distance

• Leave the ignition on with battery on charge

What does an oscilloscope measure?

• Amps & Volts

• Time & Volts

• Ohms & Time

• Resistance & Amps

The oscilloscope pattern opposite shows:

• A. A lambda sensor

• B. An injector

• C. A knock sensor

• D. A temperature sensor

A magnet which rotates within a coil wire will induce which of the following?

• Direct current

• Alternating current

• Fixed current

• Oscillating current

Which of the following is the correct definition of the term ohms?

• A. A measurement of power

• B. A measurement of resistance

• C. A measurement of current

• D. A measurement of voltage

A broken third brush in a wiper would cause no

• Wash wipe function

• Self parking facility

• Intermittent operation

• Two speed operation