Basic Electrics

Test your knowledge

Try answering the following questions:

1) Which of the following Voltage test readings 

    (taken at the negative terminal of a component

    and with the circuit switched on) indicates a 

    faulty earth?

   A) 5A

   B) 280mV

   C) 0.1V

   D) 12.6V

2) Which of the following statements is correct 

    regarding Amperage in a parallel circuit?

   A) Adding more branches will lower the total circuit

        Amperage.

   B) The Amperage will be the same anywhere in

        the circuit.

   C) The current flowing through each branch in the

        circuit is determined by the resistance values of

        the components in the respective branch.

   D) The circuit Amperage is measured by 

        connecting the Ammeter across the part of the 

        circuit to be tested.

3) A High resistance in the supply wire to a

    component causes:

   A) A voltage drop after the component.

   B) A voltage drop after the resistance.

   C) A voltage rise after the component.

   D) A reduction in current flow around the circuit.

4) Which of the following symbols appearing on 

    the display of a digital multi meter indicates a 

    unit multiplier of 1 thousandth (1/1000th)?

   A) M

   B) O.L.

   C) m

   D) k

5) The maximum acceptable Voltage drop

     measured at the positive terminal of a

    component with the circuit switched on and

    working...

    A) Should not normally exceed 0.3 Volts.
    B) Will be the same as the resistance of the    

         component.
    C) Should not normally exceed 500mV.

    D) Is equal to the sum of the voltage drops   

         around the circuit.

6) How will a rise in temperature affect the signal

    voltage from an (NTC type) engine coolant 

    temperature sensor?

    A) The voltage will rise as temperature increases.
    B) The voltage remains constant but resistance          decreases.
    C) The voltage decreases as temperature rises.
    D) None of the above answers are correct.

7) When diagnosing relay circuit faults, which two     terminals of a relay can be bridged using a fused     link wire?     A) Terminals 31 and 87.     B) Terminals 87 and 30.     C) Terminals 85 and 86.     D) Terminals 30 and 85. 8) How would you best test for a resistance in a      wire supplying voltage to a bulb that is dimly lit?     A) Disconnect the wire and test its resistance with          an Ohm meter     B) Using a voltmeter, test for voltage drop in the           wire with the circuit switched on and the          component disconnected     C) Using an Ohm meter, test the resistance in the                   wire with the circuit switched on and working     D) Using a voltmeter, test for voltage drop in the             wire with the circuit switched on and working.

Further information

Did you know the answers? Would you like to know more? To book a place on the next available course and find out, contact: AK Training Telephone: 00 44 (0) 1908 579309 Mobile: 07968 842274 Click here to send e-mail Course dates and venues 2008 Go to Basic Electrics course page

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