braking force, quick-take-up,

[VW Alignment Tech]

I'm into self study so I got a book without the answer booklet. I'm trying to pass A5 brakes this fall. I'm having trouble figuring this (and future questions, I'm sure) out.

1)while discussing what affects the amount of pressure exerted by the brakes, Technician A says the shorter the line the more pressure there will be. Technician B says braking force will increase if the size of the pistons in a master cylinder are increased.

I choose both A&B. If a brake line is short, that means (to me) there will be less distance to travel (meaning less power lost) and hence, more/greater braking force. Also, I would think that if the piston size in a master cylinder is increased, that would mean a greater volume of fluid to displace, therefore resulting in greater force when the brakes are applied.

2)While discussing quick-take-up master cylinders, Tech. A says this design allows for increased braking power. Tech. B says this design is only used on drum brake systems.

I don't know how to answer this question as I've no real idea what quick-take-up means. Just as well, I would think that a QTU MC could be used on drum and disc systems.

3)While bleeding a brake system, Tech A. loosens the brake line fitting at the MC if a bleeder screw is seized and cannot be loosened. Tech B. uses shop air to push the fluid and air from the wheel units to the MC.

I would say Tech A. has the better bleeding system (although I'm sure it's quite messy). Tech B's method (as I see it) stands a very good chance of damaging the system.