Training Bulletin 48: Engine Brake "Jake Brake"

Question 1

Advantages for apparatus equipped with “Jake Brakes” include increased ______, _____, _______, and cost-effectiveness.

Answer 1

Performance, safety, versatility

Question 2

_____engines have substantially less retarding effect upon vehicles than a _____ engine.

Answer 2

Diesel engines

Gas engine

Question 3

Why do Diesel engines have substantially less retarding effect?

Answer 3

Lack of restriction in diesel intake manifold

Question 4

The gasoline engine has a butterfly in the carburetor which creates a _______ and subsequent engine braking.

Answer 4

Vacuum

Question 5

The Jacobs Engine Brake is a ______ engine attachment that, when energized, alters the engine exhaust valve operation which converts the diesel engine into an ____ _____. This is accomplished by prematurely opening the ____ valves near the top of the ________ stroke releasing the compression pressure to exhaust.

Answer 5

Hydraulic

Air compressor

Exhaust
Compression

Question 6

The engine brake may be used for descending grades, in ____ _____, when approaching ____ _____ and, in general, whenever vehicle retarding is required.

Answer 6

City traffic

Stop lights

Question 7

The engine brake reacts quickly. It will activate or deactivate in less than ___ of a second.

Answer 7

1/4

Question 8

The Department uses three (3) different Diesel Engine/Transmission combinations in its fleet. They are?

Answer 8

CUMMINS DIESEL WITH MANUAL TRANSMISSION

CUMMINS DIESEL WITH AUTOMATIC TRANSMISSION

DETROIT DIESEL (V-8 or V-6) WITH AUTOMATIC TRANSMISSION

Question 9

CUMMINS DIESEL WITH AUTOMATIC TRANSMISSION

The Jake Brake switches on an apparatus equipped with an automatic transmission and a Cummins Diesel engine, will be on ON/OFF switch mounted on the?

Answer 9

Dash board

Question 10

CUMMINS DIESEL WITH AUTOMATIC TRANSMISSION

A ____ position switch controlling the amount of retarding power desired, mounted on the dash board, a _____ ____ switch which de-activates the jake brake if depressed, and a ______ _____ switch mounted on the _______ to de-activate the jake brake at ____ speeds.

Answer 10

Three

Throttle pedal switch

Pressure sensing switch

Transmission

Low

Question 11

JAKE BRAKE OPERATING INSTRUCTIONS:

2. Engine should be fairly _____ before engaging JAKE BRAKE. Engine preheater _____ temperature is sufficient.

Answer 11

Warm

Water

Question 12

A. ______engine retarding (#1 position on switch)

B. ______ engine retarding (#2 position on switch)

C. _____ engine retarding (#3 position on switch)

Answer 12

Minimum engine retarding

Moderate

Maximum

Question 13

DETROIT DIESEL (V-8 or V-6) WITH AUTOMATIC TRANSMISSION

The Jake Brake switches used on an apparatus equipped with an automatic transmission and a Detroit Diesel engine, will be a single, ____ position switch, ____-____-____, mounted on the ____ ____.

Answer 13

Three position switch

Off-low-high

Dash board

Question 14

DETROIT DIESEL (V-8 or V-6) WITH AUTOMATIC TRANSMISSION

Minimum engine retarding (“__” position on switch)
B. Maximum engine retarding (“__” position on switch)

Answer 14

LO

HI

Question 15

USE OF THE JAKE BRAKE ON FREEWAY OR SIMILAR OPEN ROAD SHOULD BE DICTATED BY _______ _______ AND THE OPERATOR’S GOOD _______. DESIRABLE COAST OF APPARATUS IS ELIMINATED BY JAKE BRAKE RETARDATION.

Answer 15

TRAFFIC CONDITIONS

GOOD JUDGEMENT

Question 16

USAGE GUIDE LIGHT TRAFFIC CONDITION

______ jake brake setting

Answer 16

Minimum

Question 17

MEDIUM TRAFFIC CONDITION

_______ to ______ Jake Brake switch setting

Answer 17

Minimum to moderate

Question 18

HEAVY TRAFFIC CONDITION AND EMERGENCY RESPONSES

______ Jake Brake switch setting

Answer 18

Maximum

Question 19

DO NOT ENGAGE THE JAKE BRAKE ON ___ _____. THE ADDITIONAL BRAKING EFFORT ON THE DRIVE WHEELS (____) CAN CAUSE THEM TO LOCK UP WHICH COULD RESULT IN AN UNCONTROLLABLE SKID.

Answer 19

Wet streets

Duals

Question 20

DO NOT ENGAGE THE JAKE BRAKE DURING PUMPING OR AERIAL OPERATIONS. This practice causes undesirable retardation, possible engine and component damage, and ______ _____.

Answer 20

Engine stalling

Question 21

When accelerating the apparatus, DO NOT ____ using the Jake Brake.

Answer 21

Upshift

Question 22

DO NOT ENGAGE THE JAKE BRAKE AT ____ OR _____ ENGINE SPEED. This will cause the engine to ____. To avoid stalling, depress the _____ or clutch pedal, or deactivate the Jake Brake by the ON/OFF switch.

Answer 22

Idle or low

Stall

Throttle