Vehicle Electrical & Electronic Diagnosis Quiz

16 Questions | By Markeden | Updated: Mar 21, 2022 | Attempts: 514

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A quick quiz to re-cap on the fundamental elements of diagnosis terms and procedures including some units of measurement, multimeter use, scope patterns and common abbrieviations

Questions and Answers

1.

Which of the following statements is correct?
- A.
  
  Flemings Left hand rule relates to motors
- B.
  
  Flemings Right hand rule relates to motors
- C.
  
  Faradays Left hand rule relates to motors
- D.
  
  Faradays Right hand rule relates to motors
2.

Fleming's Right Hand Rule relates to which component type?
- A.
  
  Solenoids
- B.
  
  Motors
- C.
  
  Generators
- D.
  
  Actuators
3.

What is the unit of electrical frequency?
- A.
  
  Hall
- B.
  
  Watts
- C.
  
  Hurts
- D.
  
  Hertz
4.

What does NTC stand for?
- A.
  
  Negative temporal coefficient
- B.
  
  Negative Temperature Coefficient
- C.
  
  Normal thermal coefficient
- D.
  
  Normal Temperature Coefficient
5.

If the resistance increases as the temperature increases what could this be refferred to as....
- A.
  
  Physical Temperature Change
- B.
  
  Positive Temperature Change
- C.
  
  Positive Temporal Coefficient
- D.
  
  Positive Temperature Coefficient
6.

In relation to an inductive type AC sensor which statement is correct?
- A.
  
  As wheel speed increases the resistance level increases and current flow is reduced
- B.
  
  As wheel speed increases frequency increases and amplitude increases
- C.
  
  As wheel speed increases frequency increases but amplitude decreases
- D.
  
  As wheel speed increase frequency decreases and amplitude increases
7.

What does PWM stand for?
- A.
  
  Pulse Wide Mode
- B.
  
  Phased Width Modulation
- C.
  
  Pulse Width Modulation
- D.
  
  Pulse Wide Modulation
8.

A digital signal would give you what type of pattern if checked with a scope?
- A.
  
  Square Wave
- B.
  
  Saw Tooth
- C.
  
  Sine Wave
- D.
  
  You can't test it with a scope just a resistance check
9.

If a vehicle had a high resistance in the lighting earth circuit what effect would this have on their operation?
- A.
  
  The lamp/lamps would not light up at all
- B.
  
  The bulbs would blow due to the proportional increase in current flow
- C.
  
  The current flow would be decreased proportionally and as such the lamp would glow dimly
- D.
  
  This would have no visible effect
10.

When testing an electrical circuit using a multimeter how would you test the resistance of a component or wire?
- A.
  
  Disconnect the power supply, isolate the component or wire and set the multimeter to Ohms test in series
- B.
  
  Disconnect the power supply, isolate the component or wire and set the multimeter to Ohms test in parallel
- C.
  
  Connect the multimeter across the component or wire and test in parallel
- D.
  
  Connect the multimeter in series with the component or wire with the multimeter set to amps
11.

When testing for a parasitic drain which of the following is the most practical?
- A.
  
  Ignition off disconnect the battery earth and connect an ammeter in series
- B.
  
  Set the meter to Amps and connect across the battery termonal in parallel
- C.
  
  Connect the meter in parallel with the circuit with the battery disconnected
- D.
  
  Connect the meter in series between the positive terminal and the positive lead but keep the negative lead disconnected
12.

When checking for voltage drop how should you connect your meter?
- A.
  
  In series with the component and the power supply on
- B.
  
  In parallel with the component with the power supply off
- C.
  
  In series with the component and the power supply off
- D.
  
  In parallel with the component and the power supply on
13.

When using a scope what do the X and Y axis represent?
- A.
  
  Y is horizontal and represents the amplitude/voltage X is vertical and represent Frequency/timescale
- B.
  
  X goes across/Horizontal and represents the timescale and the Y axis goes up and down/vertical and represents the amplitude/voltage
- C.
  
  X is horizontal and represents the amplitude/voltage Y is vertical and represent Frequency/timescale
- D.
  
  Y goes across/Horizontal and represents the timescale and the X axis goes up and down/vertical and represents the amplitude/voltage
14.

What component acts as an electrical one way valve until a certain voltage is breached then allows the current to flow in either direction. The componen resets itself once the voltage drops below its threhold again?
- A.
  
  Circuit Breaker
- B.
  
  Diode
- C.
  
  Transistor
- D.
  
  Zener Diode
15.

When testing a circuit with a voltmeter what is the rule of thumb for a maximum permitted volt drop on a feed/supply wire?
- A.
  
  Within 2.5 Volts of battery voltage
- B.
  
  0.5 Volts
- C.
  
  Within 1 volt of battery voltage
- D.
  
  12.6 Volts
16.

How would you test for current flow in a vehicle circuit?
- A.
  
  Ignition off disconnect the battery earth and connect an ammeter in series
- B.
  
  Ignition off disconnect the battery earth and connect an ammeter in parallel
- C.
  
  Ignition on connect the ammeter in parallel across the battery terminals
- D.
  
  Ignition off disconnect the battery and connect the ammeter in series