Home > Common Errors

  • 1018   To determine if slack adjusters need adjustment:... Answer
  • 956   Another name for controlled braking is:... Answer
  • 780   The air compressor is connected to the engine through:... Answer
  • 777   The two other names for the brake pedal are:... Answer
  • 720   After applying brakes fully, what is the maximum air loss in one minut... Answer
  • 658   On a single-trailer vehicle with brakes released, what is the maximum ... Answer
  • 642   When you apply pressure to the brake pedal, you are:... Answer
  • 636   To check the slack adjusters on S Cam brakes, you should:... Answer
  • 573   When the safety valve releases air, it means that:... Answer
  • 563   With dual air systems, the air pressure should build:... Answer
  • 549   A fully charged air system typically has ____ psi.... Answer
  • 518   The effectiveness of the spring brakes depends on the adjustment of:... Answer
  • 494   Why does air braking take more time than hydraulic braking?... Answer
  • 485   Stab braking happens when you:... Answer
  • 482   Foundation brakes:... Answer
  • 475   To check the air compressor governor "cut in" and "cut out" pressures:... Answer
  • 474   To test the air leakage rate, you should:... Answer
  • 473   How much air should the storage tanks hold?... Answer
  • 469   Some buses have a separate air tank to release spring brakes:... Answer
  • 465   When should the air governor cut out the air compressor?... Answer
  • 465   A straight truck or bus air brake system should not leak at a rate of ... Answer
  • 464   Combination vehicle: brakes released. The maximum air release... Answer
  • 456   This is used to turn on the stop lights in an air brakes system:... Answer
  • 396   After applying brakes fully max on combination vehicles, what is the a... Answer
  • 390   Stab braking is:... Answer
  • 385   The safety valve in the air compressor tank is set to open at:... Answer
  • 349   Dual air brake system:... Answer
  • 349   The brake drums or discs:... Answer
  • 330   To test the low pressure warning signal, you should do all BUT the fol... Answer
  • 321   The Governor allows the air to start pumping again when it reaches the... Answer
  • 317   When making a normal stop, when should you push in the clutch?... Answer
  • 308   What happens to the air when you push the brake pedal on S-Cam brakes?... Answer
  • 294   Air brakes take longer to stop than hydraulic brakes because:... Answer
  • 285   Which is true if your air compressor stops working?... Answer
  • 278   A combination vehicle air brake system should not lose air faster than... Answer
  • 278   The type of brake most common in commercial vehicles is:... Answer
  • 267   What happens to the S-Cam force brake shoes when the brakes are applie... Answer
  • 265   The purpose of the safety release valve in the first tank is:... Answer
  • 258   Two types of air tank drains are:... Answer
  • 256   Compressed air:... Answer
  • 248   The Governor stops pumping air when it reaches the "cut out" level, or... Answer
  • 247   Which is true regarding the braking power of spring brakes?... Answer
  • 243   An air tank is equipped with a drain valve to remove:... Answer
  • 234   Brake drums:... Answer
  • 233   What are parking brakes and emergency brakes are usually held back by ... Answer
  • 224   To test your service brakes, you should:... Answer
  • 223   The air compressor governor control:... Answer
  • 215   When a brake lining is pushed against the inside of the drum:... Answer
  • 212   The brake system that applies and releases the brakes when the driver ... Answer
  • 204   If the brake pedal is pressed and released too often:... Answer
  • 184   All vehicles with air brakes are required to have a low pressure warni... Answer
  • 174   This kind of warning signal is required on vehicles with air brakes:... Answer
  • 163   Brake shoes and linings are located:... Answer
  • 153   An emergency brake:... Answer
  • 149   A duel air brake system:... Answer
  • 144   The three types of low air pressure warning devices are:... Answer
  • 142   The Air Compressor Governor controls which of the following?... Answer
  • 140   the brake pedal in an air brake system?... Answer
  • 137   The Air Compressor Governor controls:... Answer
  • 136   This is used to make this kind of brakes function:... Answer
  • 128   When making a very quick stop, you should brake so that:... Answer
  • 127   Some air brake systems have an alcohol evaporator which helps:... Answer
  • 126   Before checking free play in manual slack adjusters, you should:... Answer
  • 122   In a single vehicle with a fully charged air system, air pressure loss... Answer
  • 121   The proper way to go down long grades is to:... Answer
  • 120   You will find the drain valve for each air tank:... Answer
  • 120   The purpose of an alcohol evaporator is:... Answer
  • 120   All vehicles with air bakes are required to have a low pressure warnin... Answer
  • 111   What keeps air in the tanks if the air compressor begins to leak?... Answer
  • 111   When the low pressure warning is activated, you should:... Answer
  • 106   An air pressure gauge:... Answer
  • 95   An application pressure gauge:... Answer
  • 94   The proper way to go down long grades is to:... Answer
  • 87   In air brake vehicles, the parking brakes should be used:... Answer
  • 79   Air braking takes more time than hydraulic braking because air brakes:... Answer
  • 77   This gauge is required for vehicles with air brakes:... Answer
  • 67   The three braking systems are:... Answer
  • 57   Compressed air is stored:... Answer
  • 52   Oil and water usually collect in compressed air tanks. If you do not h... Answer
  • 50   What is the result of oil and water collecting in air tanks?... Answer
  • 41   You should use the parking brake:... Answer
  • 39   What can happen to the brakes if oil and water collect in the air tank... Answer
  • 39   With no automatic tank drains - When should you drain the air tanks?... Answer
  • 26   When checking an air compressor belt, you should look for:... Answer
  • 19   The air tank should be drained:... Answer