DTM #5 Apparatus characteristics which can contribute to accidents

Question 1

Depending on type of vehicle, it will take between ____ to ____ for air to reach brakes

Answer 1

1/4 to 1 second

Question 2

Excessive front overhang on some trip is as much as ______ from front wheel hub

Answer 2

7’4”

Question 3

Brake fade is one of the worst consequences of heat do you to

Answer 3

Excessive breaking

Question 4

Steering, breaking and cornering are all affected by

Answer 4

Over or under inflated tires

Question 5

Traveling faster than usual saves only a few seconds while increasing the chances of an accident

Answer 5

True

Question 6

Proper tread depth reduces chances of hydroplaning in wet conditions

Answer 6

True

Question 7

Convex mirrors greatly reduce the blind areas on most apparatus

Answer 7

True

Question 8

Brake lag used for total stopping distance formula= .4 seconds
However DTM states it will take ___ to ___ second for air to reach brakes

Answer 8

1/4 to 1 second

Question 9

Treadwear is measured bi-monthly at the time of the ____ (4/32)

Answer 9

F-377

Question 10

Tire PSI are checked when the tires are ___

Answer 10

Cold

Question 11

Average width of newer triples is=

Average length of a triple is=

Answer 11

9’9”

27’

Question 12

Vehicles can hydroplane in how much water?

Answer 12

1/5” of water

Question 13

Average weight of a triple=
Average height=
Average width=
Average length=

Answer 13

16 tons
10’ height
9’9” width
27’ length

Question 14

Total stopping distance =

Answer 14

NMPH X 28/10 +

(NMPH)2 x 5/10

Question 15

_____ or less of the tire tread is not satisfactory

Answer 15

1/8”

Question 16

_____ brakes are more susceptible to break fade. _____ brakes become more efficient as they heat up

Answer 16

Drum

Disc

Question 17

Mirror placement is especially critical during emergency responses in_______.

Answer 17

Intersections

Question 18

Tire psi should be checked when tires are cold and maintained at recommended psi, for a 2003 Seagraves that’s ______ front-_____ rear

Answer 18

120 front

120 rear

Question 19

Dad’s on disc brake system may contact with a small percent of disks service therefore allowing a major percent of disk to be

Answer 19

Cooler

Question 20

On newer apparatus the widest point continues from

Answer 20

Bumper to top of the cab

Question 21

In an LAFD triple length of the wheel base is the most important factor in determining the what?

Answer 21

Turning radius

Question 22

_____ brakes are most susceptible to brake fade

Answer 22

Drum brakes