Two technicians are discussing Newton's first law of motion. Technician A says that a
lightweight vehicle requires as much energy to accelerate as a heavier vehicle.
Technician B says that a lighter vehicle requires less energy to accelerate than a
heavier vehicle. Who is correct? - Answers -✔✔ Tech B
The parking brake cable pulls on an actuating lever inside the brake drum assembly. -
Answers -✔✔ True
Tech A states using an air-operated brake on heavy trucks is easier. Tech B states that
using a hydraulic brake on a heavy truck is easier. Who is correct? - Answers -✔✔
Tech A
Static friction is resistance between nonmoving surfaces and is present in which type of
brakes? - Answers -✔✔ Parking brakes
Which of the following components is NOT typically found on an electric brake system?
- Answers -✔✔ Wheel cylinder
Tech A states that the scrub braking system worked well in rubber tires. Tech B states
that the scrub braking system worked reasonably well on dry wheel surfaces made of
wood or steel. Who is correct? - Answers -✔✔ Tech B
Skidding tires on the surface of the road (kinetic friction) do not have as much friction as
rolling tires, and therefore the stopping distance (blank), which can lead to an accident. -
Answers -✔✔ is increased
Parking brake cables transmit force from the parking brake actuating lever to the -
Answers -✔✔ Brake unit
The rotational force found in a braking vehicle tends to - Answers -✔✔ push the nose
down and lift the rear
A(n) (blank) brake (or compression brake) uses an extra lobe on the camshaft to control
an auxiliary exhaust valve at the top of each cylinder. - Answers -✔✔ Jake brake
The best example of (blank) is when a motorcycle rider applies the front brake hard
enough that the rear wheel is lifted completely off the ground. - Answers -✔✔ rotational
force
Tech A says that the heavier the vehicle, the more stopping power is needed. Tech B
says that the faster a vehicle is moving, the more braking power is needed. Who is
correct? - Answers -✔✔ Both A and B
, Some foot-mounted parking brake levers can be released by pulling a release handle,
which retracts the ratcheting tang and allows the pedal to return to its rest position. -
Answers -✔✔ True
Tech A says that disc brakes were originally developed in the early 1900's but didn't find
common use until the 1960's. Technician B says that a disc brake operates by
squeezing brake pads on both sides of a rotor or disc that is sttached to the wheel. who
is correct? - Answers -✔✔ Both A and B
All the following are disadvantages to a jake brake except - Answers -✔✔ increases
brake effectiveness
In regenerative braking, the amount of stopping power is controlled by the amount of -
Answers -✔✔ electricity generated
For hydraulic cylinders of the same size, the (blank) transmitted from one is the same
value as the (blank) applied to the other. - Answers -✔✔ force, force
A substantial leak in the (blank) will prevent enough pressure from building to exert the
necessary braking force - Answers -✔✔ hydraulic system
Technician A says that the brake calipers use hydraulic pressure from the master
cylinder to apply the brake pads. Technician B says that when the brake pedal is
depressed, a push rod transfers force through a brake booster to a hydraulic master
cylinder. Who is correct - Answers -✔✔ Both A and B
Some brake canisters incorporate a separate air chamber and large spring assembly.
These are referred as - Answers -✔✔ Spring brakes
Over time, the mechanical drum brake system gave way to the modern (blank) brake
system beacuse of its ability to automatically equalize braking forces at each wheel. -
Answers -✔✔ hydraulic drum
Disc brakes create stopping power by forcing - Answers -✔✔ flat friction pads against a
rotating disc
Brake-by-wire means there is no mechanical or hydraulic connection betwenn the brake
pedal and the - Answers -✔✔ wheel brake units
Part of the parking brake cable is inside a wound steel housing - Answers -✔✔ true
The effectiveness of friction brakes depends n the braking components' - Answers -✔✔
ability to dissipate heat quickly