AIR BRAKES Flashcards
BRAKING SYSTEM IS EQUIPPED WITH A DUAL CIRCUIT AIR BRAKE _ AND _ SYSTEM
PRIMARY
SECONDARY
THE SPRING BRAKE IS FOR WHICH AXEL?
REAR
WHAT YEARS HAD ANTILOCK BRAKING SYSTEMS (ABS) AND THE AUXILIARY FRONT AXLE PARKING BRAKE
2000-2016
WHEN GOING DOWNHILL OR HEAVY BRAKING ALWAYS RELY ON THE BRAKING EFFECT OF WHAT 4 THINGS
ENGINE
ENGINE BRAKE
EXHAUST BRAKE
RETARDER
IF SERVICE BRAKES ALONE ARE USED TO CONTROL VEHICLE SPEED EXCESS HEA MAY BE DEVELOPED CAUSING WHAT?
BRAKE FADE
IF SERVICE BRAKES ARE REQUIRED, APPLY THE BRAKES IN SHORT DURATIONS OF__
5 TO 10 SECONDS
THE BRAKE LINING MATERIAL USED PROVIDES THE BEST BALANCE OF STOPPING DISTANCE, GRADE HOLDING CAPACITY AND ___
LINING LIFE
LTI- WHEN APPLYING THE BRAKES IT IS RECOMMENDED THAT A __ CONSTANT PRESSURE BE APPLIED TO THE BRAKE PEDAL
FIRM
LTI-WHAT MAY DEPLETE THE BRAKE SYSTEMS AIR RESERVOIR SUPPY?
PUMPING THE BRAKES
THE QUICK BUILDUP (NFPA RECOMMENDATION) ALLOWS THE VEHICLE TO BE DRIVEN EVEN THOUGH THE FRONT BRAKE SECTION MAY NOT HAVE SUFFICIENT AIR PRESSURE. TRUE OR FALSE
TRUE
SEPARATE AIR RESERVOIRS SUPPLY AIR TO BOTH___ CIRCUITS
FRONT AND REAR
SAFE OPERATION IS BETWEEN _ AND _ PSI
90-120
WHAT SUPPLIES AIR TO THE FRONT AXLE?
SECONDARY SYSTEM
WHAT SYSTEM SUPPLIES AIR TO THE REAR AXLE
PRIMARY SYSTEM
WHEN PRESSURE DROPS BELOW APPROXIMATELY __PSI(LTI) AND __ PSI (PIERCE) A WARNING BUZZER AND LIGHT WILL COME ON
65
60
AIR GAUGE FOR THE LTI IS LOCATED ON WHAT SIDE OF THE DASH?
RIGHT
THE PRIMARY GAUGE HAS A __ NEEDLE AND SECONDARY GAUGE___ NEEDLE
WHITE
RED
QUICK BUILDUP ALLOWS PRESSURE TO BE BUILD UP IN WHICH AIR TANK FIRST TO ENABLE RELEASE OF PARKING BRAKES
REAR BRAKE TANKS
IN AN EMERGENCY SITUATION OPERATOR DISCRETION MUST BE USED TO USE THE APPARATUS WHEN THERE IS LESS THAN__ PSI AIR PRESSURE IN BOTH BRAKE CIRCUITS
90
USE EXTREME CAUTION WHEN OPERATING LESS THAN __PSI
60
___ AUTOMATICALLY APPLIES AND RELEASES THE BRAKES DURING LOW TRACTION OR PANIC BRAKE APPLICATIONS TO PREVENT WHEEL LOCK UP
ANTILOCK BRAKE SYSTEM
ABS IMPROVES BOTH__AND___
BRAKING EFFICIENCY AND STEERING CONTROL
IS THERE AN ON AND OFF SWITCH FOR THE ABS
NO
ABS IS INTEGRAL TO WHAT SYSTEM AND CAN NOT BE OVERRIDDEN OR TURNED OFF
AIR BRAKE SYSTEM
WHAT DECREASES THE EFFICIENCY OF THE ABS?
RAPID PUMPING OF THE BRAKES
WHEN THE ABS APPLIES THE TELMA RETARDER IS AUTOMATICALLY___
DEACTIVATED
SPRING BRAKES ARE APPLIED AND RELEASED BY THE OPERATION OF WHAT COLOR PARKING BRAKE VALVE?
YELLOW
WHERE IS THE YELLOW PARKING BRAKE VALVE LOCATED?
ON THE ENGINE DOGHOUSE INSTRUMENTAL PANEL
PUSHING THE YELLOW VALVE __ WILL RELEASE THE SPRING BRAKES
IN
PULLING THE YELLOW VALVE KNOB ___WILL APPLY THE SPRING BRAKES
OUT
THE PARKING BRAKE CIRCUIT INTENDED TO THE HOLD VEHICLE IN A PARKED POSITION AND SHOULD__ BE USED FOR NORMAL DRIVING
NEVER
IF AIR PRESSURE IS REDUCED TO APPROXIMATELY__PSI IN BOTH SYSTEMS THE SPRING BRAKE VALVE WILL AUTOMATICALLY APPLY
40
WHEN PARKING THE APPARATUS WHETHER ON LEVEL TERRAIN OR A GRADE, ALWAYS DO WHAT?
CHOCK THE WHEELS
DEPARTMENT POLICY WHEN ON SCENE
MOISTURE IS NORMAL EVEN IF EQUIPPED WITH AN AIR DRYER TRUE OR FALSE
TRUE
WHAT REMOVES MOISTURE AND CONTAMINANTS FROM PRESSURIZED AIR, WHICH COMES FROM THE COMPRESSOR BEFORE IT REACHES AIR RESERVOIRS
AIR DRYER
MOISTURE COLLECTED ON THE SURFACE OF DESICCANT PELLETS IS DISCHARGED OUT THE BOTTOM OF THE AIR DRYER EACH TIME THE __ UNLOADS
GOVERNER
THE AIR DRYER IS REPLACED EVERY__ YEAR AND FOR THE PIERCE __
OTHER
2-3 YEARS
WHAT USES AIR BRAKE SYSTEM PSI TO KEEP THE FRONT BRAKES APPLIED
AUXILLIARY FRONT WHEEL LOCK
FRONT WHEEL LOCK IS USED TO AUGMENT WHICH BRAKES IN THE EVENT THE REAR PARKING BRAKES CANNOT HOLD THE APPARATUS ON A STEEP INCLINE
REAR SPRING BRAKES
WHAT MAY CAUSE THE AUXILIARY FRONT WHEEL LOCKS TO FAIL
AIR LEAK
THE AUXILIARY WHEEL LOCK SHOULD BE USED ONLY WITH THE ENGINE__
RUNNING
THE AUXILIARY WHEEL LOCK ACCORDING TO THE FEDERAL MOTOR VEHICLE SAFETY STANDARDS(FMVSS) IS A ___ BRAKE ONLY AND SHOULD BE USED IN CONJUNCTION WITH THE ___ WHEN PARKING THE VEHICLE
SUPPLEMENTAL
YELLOW PARKING BRAKE VALVE
TO APPLY THE AUXILIARY FRONT WHEEL LOCK WHAT MUST BE APPLIED FIRST
SPRING BRAKES
WHEN THE SPRING BRAKES ARE RELEASED BY PUSHIN__ THE YELLOW BRAKE KNOB THE AUXILIARY BRAKE KNOB WILL__AND THE AUXILIARY BRAKES WILL AUTOMATICALLY RELEASE
IN
POP OUT
DISC BRAKE CALIPERS DO NOT USE__ BECAUSE IT WILL NOT PROVIDE ADEQUATE LUBRICATION
LITHIUM GREASE
S&M LUBE BRALE CALIPERS WHEN?
ANNUAL AND BRAKE REPLACEMENT
