CH 18

Question 1

An instruction plate or indicator, located in view of the operator’s position, that displays the recommended safe load at any extension and elevation.

Answer 1

load limit indicator
pg 631

Question 2

Because of the forces generated, especially as length increases, all movements must be slow, smooth, controlled, also known as

Answer 2

feathering
pg 633

Question 3

Small trees in motion, white caps visible on ponds and small lakes

Answer 3

15-24mph
pg 642

Question 4

Large tree branches in motion; whistling heard in utility wires

Answer 4

25-31mph
pg 642

Question 5

Whole trees in motion; inconvenience felt walking against wind

Answer 5

32-38mph
pg 642

Question 6

Twigs break off trees, walking against the wind is generally impeded; minor building damage

Answer 6

39-54mph

Question 7

When subjected to extreme cold (subzero temperatures), the device should be operated in a manner that will minimize or eliminate ________ to its structural members.

Answer 7

shock loading
pg 642

Question 8

Hose and coupling build heat and move toward their ______ when the air around them contributes to their heating.

Answer 8

yield point
pg 642

Question 9

Due to its weight, _______ adversely affects stability, lessens the working load capacity, and significantly reduces rescue capability.

Answer 9

ice
pg 643

Question 10

An ice buildup of no more than ____ on all surfaces may be allowed due to the added load on the device.

Answer 10

1/4 inch
pg 643

Question 11

_________ involves slowly extending and retracting the aerial device to remove accumulated ice.

Answer 11

ice shrugging
pg 644

Question 12

Aluminum aerial apparatus contain ________ that change color when overheated.

Answer 12

heat sensors
pg 645

Question 13

Situations in which the floor of the turntable or platform, the beams, and rungs of the aerial ladder, and the knuckles between the booms are not parallel to the ground can result in a

Answer 13

twisting force on the entire aerial device system
pg 647

Question 14

_________ are the most common scenarios that require below-grade aerial device operations.

Answer 14

special rescue operations
pg 649

Question 15

The aerial device should never be operated within ____ of a power transmission line.

Answer 15

10ft
pg 652

Question 16

Provide 10 feet of clearance between the aerial device and overhead high-voltage lines energized from _____ to _____ volts.

Answer 16

600 to 50,000
pg 655

Question 17

50 feet of clearance for high-voltage transmission lines over

Answer 17

50,000 volts
pg 655

Question 18

Nondestructive testing occurs every ___ years, after accidents, when the aerial device has been subjected to unusual stresses and loads, and following major repairs or overhauls.

Answer 18

5
pg 667