7290-158 Lesson 6

When presented with a vehicle with a brake fault, what is first step of diagosis?

• Hygrometer

• Visual inspection

• Micrometer

• Code reader

What component is tested using a Hygrometer?

• Brake fluid

• Engine oil

• Electrolyte

• Coolant

What is meant by term "Dry Boil Test"?

• It is when you boil away fluid and measure how long it took

• This is where you test hygrometer without using fluid

• This is where new brake fluid is used

• Where fluid with more than 3% by volume is tested

When measuring the minimum thickness of a brake disc rotor, how would do you ensure accurate measurement?

• Use a disc vernier

• Use two washers and include overall size

• Use internal micrometer

• Use a Calibrated DTi gauge

While testing disc run out you get 0.05mm on outer face, and 0.04mm on inner face. What is next action?

• Replace brake discs as out of spec.

• No action within tolerance

• Resurface pads

• Replace disc as it is too thin

What is tool shown in image?

• Digital vernier

• Dial Gauge Indicator

• Rotary Micrometer

• Clock spring scale

You have a vehicle that weighs 3500Kg, the brake efficiency results are N/S/F 550, O/S/F 525, N/S/R 400 and O/S/R 410. What is brake efficiency?

• 47.13%

• 94.26%

• 53.85%

• 35.18%

What is brake type shown?

• Disc & Drum

• Drum & Disc

• Self-servo

• Leading and trailing shoe

How do you measure brake imbalance?

• Highest reading - lowest, divided by Highest

• Highest reading plus lowest, divided by two

• Lowest reading divided by Highest reading

• Lowest reading divided by vehicle weight

After scanning vehicle, the code reader states wheel speed sensor fault. What is next step?

• Replace ALL speed sensors

• Replace both speed sensors on same axle

• Test speed sensor using Live data

• Close gap between sensor and reluctor.