CAF VEH TECH DP1

Question 1

What are the 2 types of frictions?

Answer 1

Kinetic and static

Question 2

What 4 factors govern the generation of friction?

Answer 2

Pressure, Coefficient of friction, Frictional contact

surface, Heat dissipation

Question 3

How is the coefficient of friction determined?

Answer 3

Dividing the force required to pull on object across a surface by the weight of the object

Question 4

Force is expressed in_______and area is expressed in_____?

Answer 4

Surface, and Contact

Question 5

Output force increases with ______ _______?

Answer 5

Surface area

Question 6

What are the 2 types of dual braking systems?

Answer 6

Diagonally split system and front/rear split

Question 7

What are the 4 qualities a good brake fluid should posses?

Answer 7

Flow freely at high/low temps, serves as lubricant, corrosion and rust resistance, resist evaporation

Question 8

What is one characteristic of brake fluid that could lower its boiling point?

Answer 8

a lubricant to its parts

Question 9

During normal operation what moves the secondary piston of the master cylinder?

Answer 9

The primary pushes the secondary piston spring which in turn pushes the secondary piston.

Question 10

why can’t you repair pitting in an aluminum master cylinder?

Answer 10

Because it is heat treated

Question 11

What is the most common fitting used on a brake system ?

Answer 11

Double or inverted flare style

Question 12

On a brake hose what is a lay indicator used for?

Answer 12

makes sure line isn’t spiraled after fittings are tightened

Question 13

what is a height sensing proportioning valve used for?

Answer 13

provides two different brake balance modes, to rear brakes based on load of vehicle

Question 14

what is a combination valve?

Answer 14

a single unit that combines a metering valve, proportioning valve, and a pressure differential valve

Question 15

Two types of brake power systems?

Answer 15

Vacuum assist and Hydraulic assist

Question 16

Three basic elements of a single diaphragm?

Answer 16

front/rear shell power diaphragm/return spring/push rod,
controls the degree of braking accordance to applied brake,
fluid applied pressure to pressure applied brake booster

Question 17

What are two types of drum brake designs in common use?

Answer 17

Duo servo and non servo

Question 18

5 brake drum components?

Answer 18

primary/secondary shoes, double piston wheel cylinder, single anchor, heavy coil return spring

Question 19

4 types of of automatically adjusted servo brakes?

Answer 19

basic cable, cable with over travel spring, lever with override, lever with pawl

Question 20

what is a caliper housing made of?

Answer 20

Cast Iron, and aluminium

Question 21

what are three types of audio sensors?

Answer 21

Audio, tactile, and visual