A Answer A is wrong. This is an except question. It is used on most vehicles with front disc and rear drum brakes.

B Answer B is correct. A proportioning valve is a height sensing device.

C Answer C is wrong. The metering valve gives the rear brakes a chance to over come the springs and engage with the front brakes.

D Answer D is wrong. This is an except question. It is often part of the combination valve.

A Answer A is wrong. A closed brake switch would leave the brake lights on not off.

B Answer B is correct. If both brake lights are out start with the fuse.

C Answer C is wrong. Technician B is correct.

D Answer D is wrong. Technician B is correct.

A Answer A is wrong. If the vehicle has a frozen front caliper it will pull to the other side while braking.

B Answer B is correct. Pump the brake pedal numerous times to relieve the vacuum from the brake booster. After relieving the vacuum, start the engine and the pedal should move slightly toward the floor.

C Answer C is wrong. Technician B is correct.

D Answer D is wrong. Technician B is correct.

A Answer A is wrong. Neither Technician A or B is correct.

B Answer B is wrong. Neither Technician A or B is correct.

C Answer C is wrong. Neither Technician A or B is correct.

D Answer D is correct. A micrometer is used for measuring rotor thickness. A dial indicator is used to measure lateral runout.

A Answer A is wrong. Only Dot 5 is silicon based.

B Answer B is wrong. Only Dot 5 is silicon based.

C Answer C is wrong. Only Dot 5 is silicon based.

D Answer D is correct. Dot 5 brake fluid is silicon based.