FREE AND STUDY GAMES ABOUT FOUNDATION BRAKES

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FREE AND STUDY GAMES ABOUT FOUNDATION BRAKES

EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -33 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: What are the rubber "bowls" inside the chambers called?

Answer:

Diaphragms

Question 2: S-cam type foundation brakes are mounted to what?

Answer:

Spider Question 3: What brake system has a higher mechanical braking efficiency than S-cam actuated, drum brake brakes?

Answer:

Air disc brakes

Question 4: Where should grease be applied on an S-cam brake system components?

Answer:

Cam roller pocket race

Question 5: When should you cage a spring brake chambers?

Answer:

1: Before attempting to remove and replace it, 2: When making a brake adjustment and 3: Before chocking the wheels for service work.

Question 6: What condition would cause the brake to drag in some spots?

Answer:

Wheel bearings, Drum OOR (out of round)

Question 7: How many types of bushings are there? and what are they?

Answer:

Three; They are nylon, brass and/or bronze

Question 8: An over-adjusting slack adjuster must be replaced?

Answer:

False!Question 9: What do S-cam actuated brakes, air disc brakes and air-wedge actuated brakes

Answer:

They are used on air-brake equipped truck and trailers.Question 10: Does the first letter of an edge code indicate the coefficient of friction of the friction facing when cold?

Answer:

Yes!

Question 11: How many type of slack adjuster's are there? and what are they?

Answer:

Four, they are Rockwell, Gunite, Haldex and Bendix Question 12: What is the energy of motion ultimately converted to by a vehicle brake system?

Answer:

Heat

Question 13: How many types of foundation brakes are there? What are they?

Answer:

There are three types, and they are S-cam type (most popular), Air disc and wedge type

Question 14: What are the 2 types of S-cams?

Answer:

Flat cam and S-cam

Question 15: Does the S-cam need lubricated?

Answer:

Yes, regularly Question 16: Air disc brakes do not offer better control than equivalent drum brakes?

Answer:

False!Question 17: What are three functions of slack adjusters used on truck air brake system?

Answer:

1: Multiply force applied to the S-cams, 2: Define shoe to drum freeplay & 3: Convert linear force to rotational force

Question 18: What is the purpose of Single brake chambers?

Answer:

Applies service brakes only.Question 19: Does a closed-anchor brake shoe enclose the anchor pin it pivots on?

Answer:

Yes!

Question 20: What is the torque for tightening a caging bolt nut?

Answer:

25 lbs. -ft; over-tightening will damage the housing

Question 21: There are four anchor pins used for a pair of S-cam actuated brake shoes?

Answer:

False! There are 2 Question 22: For dual brake chambers the caging bolt is always located on the side of the chamber?

Answer:

False! It may be on the side or it may be internal.Question 23: What is the most common brake drum nominal dimension used on heavy-duty trucks?

Answer:

16.5"

Question 24: What are the chambers in dual brake chambers?

Answer:

Service and parking

Question 25: What component rides the S-cam profiles?

Answer:

Shoe rollers

Question 26: Why replace the brake shoes on both ends of an affected axle?

Answer:

Wheel seal fails and saturates a shoe type brake.

Question 27: What is the only slack adjuster that is phased?

Answer:

Haldex

Question 28: What are the two ways to tell what size chamber you have?

Answer:

It will be stamped with the number (30 = 30 square inches), or measure widest part with ruler.