21.   Two technicians are discussing master cylinder residual check valves. Technician A says the check valve is used on four wheel disc brake systems. Technician B says the valve maintains pressure when the brakes are released. Who is correct?

A. Technician A

B. Technician B

C. Both Technician A and B

D. Neither Technician A or B

26.   The left front brake of a four wheel disc brake system is dragging. Technician A says this could be caused by a restriction in the brake line. Technician B says this could be caused by broken return springs. Who is correct?

A. Technician A

B. Technician B

C. Both Technician A and B

D. Neither Technician A or B

22.   Technician A says accumulators are found only on non-integral ABS systems. Technician B says the some integral ABS accumulators can store 2600 PSI of hydraulic pressure. Who is correct?

A. Technician A

B. Technician B

C. Both Technician A and B

D. Neither Technician A or B

27.   Technician A says electronic stability control systems require four wheel speed sensors. Technician B says the telltale lamp will flash when the ESC system is activated. Who is correct?

A. Technician A

B. Technician B

C. Both Technician A and B

D. Neither Technician A or B

23.   Technician A says passive permanent magnet ABS wheel speed sensors produce AC voltage. Technician B says input from wheel speed sensors are used for anti-lock brake systems, electronic traction control, and electronic stability control. Who is correct?

A. Technician A

B. Technician B

C. Both Technician A and B

D. Neither Technician A or B

28.   Which of these is not part of an integral ABS unit.

A. Hydraulic booster

B. Master Cylinder

C. Hydraulic Modulator

D. Vacuum Booster

24.   A vehicles right front wheel has a growl that increases with vehicle speed. The most likely cause is:

A. Excessive rotor lateral runout.

B. Warped rear brake drums.

C. Worn CV-Joint.

D. Worn wheel bearing.

29.   A three-function combination valve has all of these except:

A. Proportioning valve.

B. Metering valve.

C. Diverter valve

D. Pressure Differential Switch.

25.   Two technicians are discussing traction control systems. Technician A says if the amber TCS light flashes while driving there is an electrical fault in the system. Technician B says these systems require an electric pump and accumulator. Who is correct?

A. Technician A

B. Technician B

C. Both Technician A and B

D. Neither Technician A or B

30.   A Hydro-Boost brake system has reduced braking performance. Technician A says to check the power steering system. Technician B says to check the vacuum check valve. Who is correct?

A. Technician A

B. Technician B

C. Both Technician A and B

D. Neither Technician A or B