MLR Review

A digital multimeter (DMM) reading of 450 mV is equal to:

• 0.045 volts.

• 0.450 volts.

• 4.50 volts.

• 45.0 volts.

Which of these statements is correct about the differences between 5W-30 and 10W-30 motor oils?

• 10W-30 will take more heat before it "breaks down."

• 10W-30 has more detergent additives

• 5W-30 has a higher viscosity at higher temperatures.

• 5W-30 has a lower viscosity at lower temperatures.

The tires of a vehicle are being rotated and balanced.

Technician A says that the wheel weight retaining clips must be matched to the rim profile. Technician B says that directional tires are rotated in a criss-cross pattern.

Who is right?

• A only

• B only

• Both A and B

• Neither A or B

Incorrect valve timing can be caused by:

• low engine vacuum.

• low compression ratio.

• incorrect ignition timing.

• incorrect timing belt position.

The starter motor current draw exceeds maximum specification by more than 50 amps and the motor spins slowly on initial operation. This could be caused by:

• a worn starter motor

• an open starter cable

• a misadjusted park/neutral switch.

• a shorted ignition switch.

The following question contains the word EXCEPT. Read the question carefully and look for the choice that could NOT cause the described situation. A fire extinguisher designated for A-, B-, and C-class fires can be used on all of the following types of fire EXCEPT:

• wood and paper.

• gasoline and diesel fuel.

• magnesium and titanium.

• electrical equipment.

Both front wheels are to be removed from a vehicle.

Technician A says that if a floor jack is to be used to raise the vehicle, the vehicle should be supported with jack stands.

Technician B says that if an electric lift is to be used to raise the vehicle, jack stands should be placed at all four corners of the vehicle.

Who is right?

• A only

• B only

• Both A and B

• Neither A or B

Which of these is the electronic device that allows current to flow only in one direction?

• Transistor

• Diode

• Capacitor

• Resistor

The starter motor is to be removed from a vehicle. The first operation to be performed by the technician should be to:

• disconnect the positive battery cable.

• disconnect the negative battery cable.

• disable the SRS system.

• remove the transmission dust cover.

While performing an automatic transmission service at 60,000 miles, the technician notices a grayish sludge on the magnet in the pan.

Which of these could be the cause?

• A leaking transmission cooler

• A restricted transmission cooler

• Normal transmission wear

• Excessive bushing wear