NOCTI Automotive Technology 3

Question 1

What is the standard operating voltage of a fully charged 12-volt automotive battery?

Accepted Answer

12.6 volts

Answer

11.5 volts

Answer

13.2 volts

Answer

14.5 volts

Question 2

What is the primary function of the alternator in an automotive electrical system?

Accepted Answer

Convert engine mechanical energy into electrical energy to charge the battery and power accessories

Answer

Store electrical energy for engine starting

Answer

Regulate voltage from the battery to the ignition system

Answer

Convert DC current to AC current for high-voltage components

Question 3

Which type of fuel injection delivers fuel directly into the combustion chamber rather than the intake port?

Accepted Answer

Gasoline direct injection (GDI)

Answer

Throttle body injection (TBI)

Answer

Port fuel injection (PFI)

Answer

Sequential fuel injection (SFI)

Question 4

While driving, the battery warning light illuminates on the dashboard. What is the MOST likely cause?

Accepted Answer

Alternator is not charging the battery

Answer

Battery is fully discharged and needs replacement

Answer

A fuse protecting the battery circuit has blown

Answer

The battery terminal connections are loose

Question 5

What is the function of the Throttle Position Sensor (TPS)?

Accepted Answer

Signal the ECM about throttle plate angle to calculate engine load and fuel demand

Answer

Measure exhaust back pressure at the throttle body

Answer

Control idle speed by opening and closing the throttle automatically

Answer

Detect knock and retard ignition timing

Question 6

When testing a circuit with a multimeter set to DC volts and the reading shows 0 volts at a powered component, what does this MOST likely indicate?

Accepted Answer

There is an open circuit (break) between the power source and the test point

Answer

The component is functioning correctly at full voltage

Answer

The circuit is drawing excessive current

Answer

The ground side of the circuit has high resistance

Question 7

Which component in the fuel system is responsible for maintaining consistent fuel pressure delivered to the fuel injectors?

Accepted Answer

Fuel pressure regulator

Answer

Fuel filter

Answer

Fuel pump relay

Answer

Fuel injector driver module