Shared Flashcard Set

Details

1 OAK Engineer - Brakes
Numbers associated with the Brake Test
17
Engineering
Professional
07/28/2010

Term
 At what p.s.i. must the air compressor governor cut out?
Definition
 130lbs DMV 63
Term
 When tank pressure falls below what PSI must the governor allow the compressor to begin pumping again?
Definition
 85 p.s.i.DMV 63
Term
 How many brake systems are there?
Definition
 Three (spring, service, and emergency)
Term
 During the Static Leakage Test with a fully charged air system, the engine off, all brakes released, and the system settled what is the maximum drop over the course of one minute?
Definition
 2 p.s.i. DMV 70
Term
 During the Applied Leakage Test with a fully charged air system, the engine off, all brakes released, and the system settled, and the brake pedal firmly applied what is the maximum drop over the course of one minute?
Definition
 3 p.s.i. DMV 71
Term
 The air compressor governor must cut out prior to the needle reaching?
Definition
 130 p.s.iDMV 71.
Term
 At what pressure must the low air pressure warning device activate?
Definition
 Between 55 and 75 p.s.i.DMV 71
Term
 While checking the Air Pressure Buildup Rate the pressure should build from 85 to 100 p.s.i. within in how many seconds?
Definition
 45 secondsDMV 72
Term
 While checking the Air Pressure Buildup Rate the pressure should build from what pressure to what pressure within in 45 seconds?
Definition
 85 to 100 p.s.i.
Term
 When the brakes are applied the push rod from the brake chamber should not move more what distance?
Definition
 Two inches DMV 118
Term
 The angle between the push rod and the adjustor arm should be a little over what degrees when the brakes are released?
Definition
 90 degrees DMV 118
Term
 If (blank) or more of of the leaf springs are missing or broken the vehicle is put out of service?
Definition
 1/4 DMV 118
Term
 Minimum tread depth on steering axle tires is?
Definition
 4/32"DMV 118
Term
 What is the minimum tread depth on all non steering tires?
Definition
 2/32"DMV 118
Term
 When checking the brake chambers what are you looking for?
Definition
 Check to see that brake chambers are not leaking, cracked, dented, and are mounted securelyDMV 118
Term
 When checking Brake Drums what are you checking for?
Definition
 Check for cracks, dents, or holes. Also check for loose or missing bolts.DMV 118
Term
 At what pressure do spring brakes apply?
Definition
 20 p.s.i. to 45 p.s.i.
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