Chapter 97 Braking System Principles
Quiz by Matt Lobdell
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- Q1
Which Greek letter is used to represent the coefficient of friction?
Mu (μ)
Delta (Δ)
Omega (Ω)
Pi (π)
30s - Q2
The amount of asbestos in brake friction material is being restricted because ________.
it is a health hazard
it causes excessive brake drum/rotor wear
asbestos from brakes contaminate rivers and streams
it does not transfer heat to the drum/rotor
30s - Q3
What type of binder is used in all brake friction materials?
Carbon
Phenolic resin
Rubber scrap
Ceramic powders
30s - Q4
An edge code reading for coefficient of friction is EF. This means ________.
the coefficient of friction is higher when the brakes are hot
a higher quality brake has a code of FF
the coefficient of friction is higher when the brakes are cold
the coefficient of friction is 0,50
30s - Q5
Brake pads and linings that use synthetic material, such as aramid fibers, instead of steel are usually referred to as ________.
ceramic
NAO
NAS
Any of the above
30s - Q6
What can the driver do to reduce the possibility of brake fade caused by heat?
Shift the transmission into neutral and allow the vehicle to coast down long or steep hills
Ride the brakes to keep the shoes and pads against the drum or rotor
Select a lower transmission gear
Pump the brake pedal while descending a steep hill
30s - Q7
Brake fade can occur due to ________.
gas fade
mechanical fade
Any of the above
water fade
30s - Q8
Why is copper being reduced in brake friction materials?
Because it is a health concern when it becomes airborne
To help reduce the weight of the vehicle
It can affect life in rivers and streams
To help reduce the cost of the brake pads/linings
30s - Q9
The kinetic energy of a vehicle traveling at 60 mph is ________ when compared to the same vehicle traveling at 30 mph.
twice as much
three times higher
ten times higher
four times as much
30s - Q10
Disc brake pads can reach temperatures as high as________.
300 degrees F (150 degrees C)
1300 degrees F (700 degrees C)
2000 degrees F (1093 degrees C)
1000 degrees F (540 degrees C)
30s - Q11
All of the following are correct statements about braking EXCEPT ________.
the heavier the vehicle, the greater the kinetic energy when moving
kinetic energy of a vehicle doubles when the speed doubles
if the vehicle weight is doubled, the kinetic energy of a moving vehicle is doubled
kinetic energy must be absorbed by the braking system
30s - Q12
Technician A says that the front brakes do most of the braking because the front brakes are larger. Technician B says that due to weight transfer, most of the braking force needs to be done by the front brakes. Which technician is correct?
Both technicians
Technician A only
Technician B only
Neither technician
30s - Q13
Technician A says that disc brake rotor may have internal passages for cooling. Technician B says that the faster the vehicle is traveling when the brakes are applied, the greater the amount of heat created in the brake system. Which technician is correct?
Both technicians
Neither technician
Technician B only
Technician A only
30s - Q14
Brake fade caused by water can occur ________.
whenever driving through water puddles or during a severe rainstorm
only if the vehicle is driven in water above the centerline of the axle
whenever it rains and the roads are wet or damp
due to moisture in the air on a humid day
30s - Q15
Maximum deceleration rates for a typical passenger car or light truck is ________.
16 to 32 ft/sec2
5 to 10 ft/sec
200 to 250 ft/sec2
1 to 3 ft/sec
30s