SK Air Brake Test 6
- Perfect for first-time and renewal commercial applicants, and those adding endorsements
- Based on 2024 SK commercial driver's licence manual
- Triple-checked for accuracy
- Updated for October 2024
questions
correct answers to pass
passing score
- What is created when brake shoe linings push against the machined surfaces of the brake drums?
- In an optimal setting, how long is the brake lag usually?
- Is it possible to compress air into a space smaller than it naturally occupies?
- Where do metal brake drums dissipate the heat produced during braking?
- The stopping distance of a vehicle depends on its speed, its weight and all of the following factors EXCEPT
- What device commonly used in braking systems provides mechanical advantage?
- What is responsible for regulating and limiting the process of air compression?
- The responsibility of brake shoes and drums or brake rotors and pads is....
- Is the operation of all air compressors continuous...?
- The compressor's intake system sources air from...
- Are all compressors operating constantly while the engine is operating?
- Should compressors that have their own air filtration system be serviced regularly?
- What is the main role of a compressor in a vehicle's air brake system?
- What is the main function of a reservoir in the air brake system?
- What is the fundamental role of a foot valve?
- What is the standard brake assembly used on truck and trailer axles?
- The governor must unload the air compressor when system air pressure reaches
- Some compressors use the engine's own lubrication. Other compressors
- What occurs when air pressure is released from the service-brake chamber?
- Air compressors can either be directly gear driven from the engine or...
- How much below the cut-out pressure does the governor typically kick in?
- Are the reservoirs capable of storing an adequate volume of air to allow for several brake applications if the engine stops or the compressor fails?
- How is heat generated by the brakes dissipated?
- What is the primary responsibility of a governor in the air brake system?
- What's another term for the floor-mounted brake pedal?
- At a minimum of what pressure does the governor need to reactivate the compressor into the pumping phase?
- What task do brake chambers accomplish?
- When you press down on the foot valve, through what does air pressure enter the pressure side of the brake chamber?
- What is the recommended frequency for completely draining reservoirs?
- When the brakes are activated, air pushes against each service-brake diaphragm causing the push rod to press against...
- What is referred to as compressed air?
- How many fundamental components are present in an air brake system?
- What determines the maximum air pressure available for brake applications?
- What is the specific name for each reservoir's installed drain valve?
- At what level of pressure is the air system considered fully charged?
- What is referred to as a diaphragm?
- In which line is the ratio valve typically installed?
- How should you react if the low air warning system triggers?
- Under which condition would the stop light switch, an air-signaled electrical switch, activate?
- Typically, at what pressure is the safety valve pre-set?
- What is the result of air pushing against each service-brake diaphragm?
- What major role does a quick-release valve accomplish in air brake systems?
- To improve the basic air brake system, all of these devices can be added to it EXCEPT
- What is the term for when the governor switches the compressor out of its pumping stage?
- From which reservoir does the air needed to operate the brakes originate?
- What's an alternative name for the supply reservoir?
- Any of these can cause unpredictable and potentially hazardous brake performance EXCEPT
- What influences the amount of heat a brake drum can absorb and release into the atmosphere?
- What is the given name for the first reservoir that is closest to the compressor?
- Where is air delivered through the foot valve when the brake pedal is pressed?