AYES A6 Electrical Practice Exam

Semiconductors are made useful as conductors through which of these processes? 

• Doping
• Electrolysis
• Purification
• Ionization

In an electrical circuit, a diode functions as a: 

• valve.
• timing device.
• resistor.
• fuse.

What is the purpose of a rectifier circuit?

• To convert DC voltage to AC 
• To convert AC voltage to DC 
• To smooth out voltage pulsations 
• To create square wave AC

Which of these are advantages of using light emitting diodes (LEDs) over incandescent lamps?

• LEDs are less expensive.
• LEDs produce more light and operate at higher voltages. 
• LEDs are not current or voltage sensitive.
• LEDs produce less heat and require less current to operate.

 Which part of a computer receives information and makes decisions based on its programming?

• ROM
• CPU
• CDR
• RAM

To prevent damage to a control module, which of these does a grounding type switch always use?

• Diode
• Capacitor
• Resistor
• Transistor

In a thermistor, electrical resistance decreases as:

• voltage increases.
• voltage decreases
• temperature increases.
• temperature decreases.

When a normally closed relay is energized, its contacts:

• make contact.
• turn on.
• open.
• close.

In a cruise control system, which component controls the amount of vacuum that is applied to the servo unit?

• The transducer.
• The throttle body.
• The Cruise switch
• The brake pedal position switch

In some vehicles, any of these actions may cancel the cruise control function EXCEPT: 

• applying the brakes.
• accelerating the vehicle.
• driving full throttle up a very steep hill.
• shifting gears in a manual transmission vehicle.