Auto 06 - Stop! Write This Quiz, Pt 1
The first of two quizzes on brakes and brake systems.
- 1.
Why are front brakes changed more often than rear brakes?
- A.
Disc brakes aren’t as durable as drum brakes
- B.
It’s not true - rear brakes are changed more frequently
- C.
Front brakes have to work harder than rear brakes
- D.
Brakes don’t need to be changed
Correct Answer
C. Front brakes have to work harder than rear brakesExplanation
It's physics; as a vehicle slows down, more weight is transferred to the front wheels, which means more braking force is needed on the front. If equal braking force was put on the rear as well as the front, the rear wheels would likely lock up, and lose breaking power.Rate this question:
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- 2.
How many pistons are found in a master cylinder?
- A.
One - the slave cylinder distributes the pressure
- B.
Two - one for each system
- C.
Three - in case the first two fail, there is a back up
- D.
Four - one for each wheel
Correct Answer
B. Two - one for each systemExplanation
Modern master cylinders have pistons to drive two separate hydraulic circuits, either a front-rear divided circuit or a diagonally split circuit. The idea behind separate circuits is that if one fails, the other will likely still be functioning. "Safety redundancy"!Rate this question:
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- 3.
Which type of disc brake has a piston on each side of the rotor?
- A.
Fixed caliper
- B.
Floating caliper
- C.
Sliding caliper
- D.
All disc brakes have pistons on each side of the rotor
Correct Answer
A. Fixed caliperExplanation
Fixed caliper means that only the pistons move to put pressure on each side of the disc. Sliding and floating caliper systems (essentially the same thing with different names) depend on the caliper moving to put pressure on both sides of the disc.Rate this question:
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- 4.
How is rotor wear accommodated for on disc brakes?
- A.
Return springs
- B.
Square-cut O-ring
- C.
Hydraulic pressure
- D.
Centripetal force
Correct Answer
B. Square-cut O-ringExplanation
Square-cut rings allow the piston to advance as far as they need to to provide stopping forces, and only pull the piston back a certain amount, so as the disc wears, the pistons can keep advancing.Rate this question:
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- 5.
The friction material on disc brakes are called what?
- A.
Pads
- B.
Shoes
- C.
Stoppers
- D.
Asbestos
Correct Answer
A. PadsExplanation
The friction material on disc brakes is called pads. Pads are made of a high-friction material, such as ceramic or semi-metallic compounds, that is pressed against the rotating disc to create friction and slow down or stop the vehicle. Pads are designed to withstand high temperatures and provide consistent braking performance. They are a crucial component of disc brake systems and need to be regularly inspected and replaced when worn out to ensure safe and effective braking.Rate this question:
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- 6.
The two main types of drum brakes are called Duo-Servo and...
- A.
Single-Servo
- B.
Shoe-type
- C.
Non-Servo
- D.
Haploid
Correct Answer
C. Non-ServoExplanation
Non servo (also known as leading-trailing) type are the other main type of drum brakes. By the way; "shoe" is the name of the friction material on drum brakes, and "Haploids" have one set of chromosomes (n=1)... I lost interest after that.Rate this question:
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- 7.
What is the function of the metering valve?
- A.
Measures how much brake fluid needs to be added to master cylinder
- B.
Measures amount of hydraulic pressure is applied to front and rear brakes
- C.
Measures amount of hydraulic fluid lost to evaporation
- D.
Delays front brake application until rear brakes are applied
Correct Answer
D. Delays front brake application until rear brakes are appliedExplanation
The metering valve is responsible for delaying the application of the front brakes until the rear brakes are applied. This is important for maintaining proper balance and preventing the front brakes from engaging too quickly, which could lead to instability or loss of control. By delaying the front brake application, the metering valve helps ensure that the braking force is distributed evenly between the front and rear brakes, improving overall braking performance and stability.Rate this question:
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- 8.
What does the proportioning valve do?
- A.
Automatically mixes water into brake fluid for correct dilution
- B.
Equalizes amount of hydraulic pressure is applied to front and rear brakes
- C.
Produces ‘feedback pressure’ to brake pedal.
- D.
Limits hydraulic pressure to rear brakes to prevent wheel lock-up
Correct Answer
D. Limits hydraulic pressure to rear brakes to prevent wheel lock-upExplanation
Under braking conditions, the weight of the vehicle shifts towards the front, leaving less weight over the rear wheels. With less weight, wheel lock-up is likely, and remains not desirable.Rate this question:
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- 9.
Pressure differential switch does what?
- A.
Detects loss of pressure (leak) in a circuit and turns on warning light.
- B.
Electronically controls hydraulic pressure to front and rear brakes.
- C.
Electronically delays the application of the rear brakes
- D.
Electronically delays the application of the front brakes
Correct Answer
A. Detects loss of pressure (leak) in a circuit and turns on warning light.Explanation
If one circuit loses pressure, this switch senses the difference in hydraulic pressure and lights a warning light.Rate this question:
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- 10.
Why are drum brakes easier to use as parking brakes than disc brakes?
- A.
They provide better friction for difficult parking situations
- B.
The hydraulics are less likely to fail than on disc brakes
- C.
It is easier to activate drum brakes using mechanical means
- D.
The front brakes are used more in parking brake situations
Correct Answer
C. It is easier to activate drum brakes using mechanical meansExplanation
Hydraulics are not reliable to hold pressure on their own, so parking brakes are mechanically actuated, and drum brakes are easier to arrange for that.Rate this question:
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