Technician A says manual parking brake systems use a hand operated lever and cable system to apply the parking brake mechanisms located in the rear brake system.Technician B says one type of rear disc parking brake system incorporates a self-adjusting thrust screw and ball assembly in the caliper.Who is correct? A) Technician A B) Technician B C) Both Technician A and B D) Neither Technician A or B

## Step 1<br />Technician A's statement is about manual parking brake systems. These systems indeed use a hand-operated lever and cable system to apply the parking brake mechanisms located in the rear brake system. This is a standard design in many vehicles, where the parking brake is manually engaged and disengaged by the driver.<br /><br />## Step 2<br />Technician B's statement is about a type of rear disc parking brake system. This system does incorporate a self-adjusting thrust screw and ball assembly in the caliper. This mechanism allows the brake to self-adjust to changes in the brake shoe and drum wear, ensuring consistent braking performance.<br /><br />## Step 3<br />Both Technician A and Technician B are correct in their descriptions of the respective parking brake systems. Technician A correctly describes the manual parking brake system, while Technician B correctly describes the self-adjusting thrust screw and ball assembly in the rear disc parking brake system.