Drum brake systems - Study guides, Class notes & Summaries

Attitude - A good attitude is a professional truck driver's badge of honor. Sharing the roads with automobiles must be a safety concern for the professional driver ABS - Keeps the vehicle under control by preventing wheel lock up during braking. Additional things to check during a walk-around inspection - Coupling system areas Landing Gear Air compressor - The air compressor pumps air into the air storage tanks. The air compressor is connected to the engine through gears or a v-belt. Air...

During normal driving, spring brakes are usually held back by: - Answer air pressure The brake pedal in an air brake system: - Answer Controls the air pressure applied to put on the brakes The brake system that applies and releases the brakes when the driver uses the brake pedal is what system? - Answer service system All air braked equipped vehicles must have what? - Answer A supply pressure gauge If your truck or bus has dual parking control valves, you can use pressure fro...

Complete Test Bank for Automotive Technology, A Systems Approach, 7th Edition by Jack Erjavec, Rob Thompson ; ISBN13: 9780357717417. (Full Chapters included Ch 1 to 55).....1. Careers in the Automotive Industry. 2. Workplace Skills. 3. Basic Theories and Math. 4. Automotive Systems. 5. Hand Tools and Shop Equipment. 6. Diagnostic Equipment and Special Tools. 7. Working Safely in the Shop. 8. Preventative Maintenance and Basic Services. 9. Automotive Engine Designs and Diagnosis. 10. Eng...

AN ENGINE BRAKE (JACOBS BRAKE) A. IS A SELF-ENERGIZING SERVO TYPE. B. IS NORMALLY USED IN PLACE OF A SPRING BRAKE. C. RESTRICTS THE INTAKE PORT AND CAUSES A BUILD UP OF 30-45 LBS OF PRESSURE. D. OPENS THE EXHAUST VALVES NEAR THE TOP OF THE COMPRESSION STROKE TO RELEASE THE COMPRESSED AIR. (CORRECT AWNSER) IN THE SYSTEM SHOWN BELOW, THE PART AT C IS: A. AN INVERSION VALVE. (POSSIBLE CORRECT AWNSER) B. A SAFETY VALVE. C. A MODULATOR VALVE. (NOT CORRECT AWNSER) D. A RELAY VALVE. ...

AN ENGINE BRAKE (JACOBS BRAKE) A. IS A SELF-ENERGIZING SERVO TYPE. B. IS NORMALLY USED IN PLACE OF A SPRING BRAKE. C. RESTRICTS THE INTAKE PORT AND CAUSES A BUILD UP OF 30-45 LBS OF PRESSURE. D. OPENS THE EXHAUST VALVES NEAR THE TOP OF THE COMPRESSION STROKE TO RELEASE THE COMPRESSED AIR. (CORRECT AWNSER) IN THE SYSTEM SHOWN BELOW, THE PART AT C IS: A. AN INVERSION VALVE. (POSSIBLE CORRECT AWNSER) B. A SAFETY VALVE. C. A MODULATOR VALVE. (NOT CORRECT AWNSER) D. A RELAY VALVE. ...

CDX Brakes midterm answers Graded A+ All of the below statements are true except: A service brakes consist of drum and/or disc brakes and are operated by hand All of the below statements are true except: In drum brakes, the heat is created outside of the drum and transferred to the inner surface If we triple the speed of an object, the kinetic energy will: increase by nine times Medium and heavy duty. vehicles often require increased braking in situations........... exhaust b...

You should know that brakes are fading when: correct answers You have to push harder on the brake pedal to control your speed on a down grade. The brake system that applies the use of the brakes when the driver uses the brake is the: correct answers Service brake system. The air compressor governor controls: correct answers When air is pumped into the air tanks. If your truck's air compressor has its own oil supply. When should you first check its oil level? correct answers Before driv...

In what year was FMVSS-121 introduced? A. 1997, B. 1998, C. 1975, or D. 1957? 1975 When a truck has no air pressure in its tanks, which warning devices are activated when the ignition key is turned on? A. A buzzer, B. Red light, C. A dash gauge, or D. All of the above. all of the above what legislation mandates every required standard of a highway truck air brake system A. osha B. fmvss 105 C. fmvss 121 D. nhtsa C. FMVSS 121 if a truck is FMVSS 121 compliant, which of the...

Michigan CDL Air Brakes Exam Complete Questions with Graded A+ Correct Answers 3 different braking systems that make up Air Brakes Service Brake, Parking Brake, Emergency Brake Air Compressor Pumps air into storage tanks and connected to the engine via gears or a v-belt. Air Compressor Governor Controls when the air compressor will pump air into the air storage tanks. When tank pressure rises to the cut-out level, the governor stops the compressor from pumping. When the tank pressu...

CDL Air Brakes Part 2 Questions and Answers Already Passed The air pressue should not drop more than 3 psi single , 4psi combination, 6psi combination of 3 + In one minute during an APPLIED leakage test What is a supply pressue gauge used for Guages tell you how much pressure is in the air tanks (true or false) The service brake system applies and releases the parking brakes when you use the parking brake control False (true or false) When air tank pressure rises to around 125 ...