The winch and stinger can lift loads in certain positions that will overload the boom.
True or False?
The Guidebook for Linemen and Cablemen 2nd Ed. Textbook, Chap. 16, Pg. 650, Number 3
True
Damage to the rotation gear of a digger derrick can be caused by ____.
a. extending the intermediate boom while raising the load line
b. first booming up to suspend the load, then lifting with the winch
c. operating a heavy load with the truck set up on a slope
d. using a two-part line when lifting weights that exceed the rating of the winch
The Guidebook for Linemen and Cablemen 2nd Ed. Textbook, Chap. 16, Pg. 650, “Rotation Gear Failure Hazard,” Paragraph 1, Bullet 4
c. operating a heavy load with the truck set up on a slope
The lifting capacity of a digger derrick is decreased when ____.
a. a two-part line is used
b. all boom extensions are attached
c. the boom angle is increased
d. the boom is extended away from the turret
The Guidebook for Linemen and Cablemen 2nd Ed. Textbook, Chap. 16, Pg. 649, “Lifting with a Digger Derrick,” Paragraph 1, Number 2
d. the boom is extended away from the turret
The lifting capacity chart for each digger derrick must be ____.
a. attached to the turret base
b. kept with the operator manual
c. updated periodically
d. visible from the boom operator’s position
The Guidebook for Linemen and Cablemen 2nd Ed. Textbook, Chap. 16, Pg. 649, “Lifting with a Digger Derrick,” Paragraph 1, Number 1
d. visible from the boom operator’s position
On a digger derrick, the stinger will not extend if the overload protection is working.
True or False?
The Guidebook for Linemen and Cablemen 2nd Ed. Textbook, Chap. 16, Pg. 653, “Checking a Unit’s Overload Protection,” Paragraph 1, Sentence 3
True
The lifting capacity changes with the direction of the boom in relation to the truck, outriggers, and slope of the ground. A typical chart will show a ____ rating when operating the boom over the side and at a 5° slope.
a. 60%
b. 65%
c. 70%
d. 75%
The Guidebook for Linemen and Cablemen 2nd Ed. Textbook, Chap. 16, Pg. 650, Number 4
a. 60%
The maximum working load for a one-inch double-braided polyester winch rope is ____.
a. 2,700 lbs
b. 4,000 lbs
c. 6,000 lbs
d. 10,000 lbs
The Guidebook for Linemen and Cablemen 2nd Ed. Textbook, Chap. 16, Pg. 652, Figure 16-16, “Typical Digger Derrick Winch Cable Capacities,” Row 3
c. 6,000 lbs
The assembly area for substation structures should be planned so that a digger derrick can lift each section in the sequence it will set up.
True or False?
Substation Construction Guidelines Textbook, Chap. 6, Pg. 165, “Assembly,” Paragraph 2, Sentence 4
True
To determine the Working Load Limit (WLL) of rigging components, the ____ is divided by the safety factor.
a. breaking strength
b. failure threshold
c. mechanical collapse
d. tension rating
The Guidebook for Linemen and Cablemen 2nd Ed. Textbook, Chap. 17, Pg. 663, “Working Load Limits,” Paragraph 2, Sentence 2
a. breaking strength
When the nuts are installed, the bolts should be long enough so that at least ____ thread(s) is/are seen protruding through the nut.
a. 1
b. 2
c. 3
d. 4
Substation Construction Guidelines Textbook, Chap. 6, Pg. 165, “Bolts,” Paragraph 1, Sentence 4
b. 2
As a substation structure is placed, the nuts are torqued to their required values before all bolts are set in place to prevent it from slipping.
True or False?
Substation Construction Guidelines Textbook, Chap. 6, Pg. 165, “Bolts,” Paragraph 1, Sentence 5
False
A synthetic web sling has a catalog breaking strength of five tons. Using the typical safety factor for synthetic web slings, determine the WLL.
a. 1,000 lbs
b. 2,000 lbs
c. 3,500 lbs
d. 5,000 lbs
The Guidebook for Linemen and Cablemen 2nd Ed. Textbook, Chap. 17, Pg. 664, Paragraph 1, Chart
Substation Construction Guidelines Textbook, Chap. 6, Pg. 149, “Safety Factor,” Paragraph 1, Formula
b. 2,000 lbs
In order to maintain a safe distance from a section being hoisted, tag lines should be used to control the section.
True or False?
Substation Construction Guidelines Textbook, Chap. 6, Pg. 165, “Erecting the Structure,” Paragraph 4, Sentence 1
True
Sling angle is the angle ____.
a. a sling leg makes with a plumb line
b. a sling leg makes with an imaginary horizontal line
c. between the two sling legs at the hook
d. bisecting the angular seperation of the two legs
Substation Construction Guidelines Textbook, Chap. 6, Pg. 150, “Sling Angle,” Paragraph 1, Sentence 1
b. a sling leg makes with an imaginary horizontal line
When two sling legs are used in a lift and the sling angle is ____, the tension on each sling leg is equal to the weight of the load.
a. 30°
b. 45°
c. 60°
d. 75°
Substation Construction Guidelines Textbook, Chap. 6, Pg. 150, “Sling Angle,” Figure 1
a. 30°
A structural beam with a 2,000-pound mass is being lifted using two slings with a 60° sling angle. The tension on each sling leg is ____.
a. 1,076 lbs
b. 1,154 lbs
c. 1,560 lbs
d. 2,000 lbs
Substation Construction Guidelines Textbook, Chap. 6, Pg. 150, “Sling Angle,” Figure 1
b. 1,154 lbs
A structural beam with a 2,000-pound mass is being lifted using two slings at a 45° angle. The tension on each sling leg will be ____.
a. 1,076 lbs
b. 1,154 lbs
c. 1,414 lbs
d. 2,000 lbs
Substation Construction Guidelines Textbook, Chap. 6, Pg. 150, “Sling Angle,” Figure 1
c. 1,414 lbs
When rigging a shackle on a hook, to avoid the shackle sliding to one side of the pin and loading one leg, ____.
a. invert the shackle so that the bow is in contact with the hook
b. pack the pin with the washers to the center of the shackle
c. tape the pin to the hook on center
d. use a single sling with the shackle bow in contact with the hook
Substation Construction Guidelines Textbook, Chap. 6, Pg. 152, “Shackles,” Bullet 2
b. pack the pin with the washers to the center of the shackle
An alloy steel chain has a minimum breaking strength of 24,000 pounds. With a safety factor of ____, the working load limit is three tons.
a. 4
b. 5
c. 6
d. 10
The Guidebook for Linemen and Cablemen 2nd Ed. Textbook, Chap. 17, Pg. 664, Paragraph 1, Chart
a. 4
Because of high tensions, sling angles of ____ or less are to be avoided.
a. 15°
b. 30°
c. 45°
d. 60°
Substation Construction Guidelines Textbook, Chap. 6, Pg. 150, “Sling Angles,” Paragraph 1, Last Sentence
When lifting an object with eyebolts attached, the loading should be applied in the plane of the eye so that the bolts do not bend sideways.
True or False?
Substation Construction Guidelines Textbook, Chap. 6, Pg. 151, “Lifting Points,” Paragraph 2, Sentence 1
True
A winch cable can come off and drop the load being lifted if ____ or more wraps are not left on the drum.
a. 1
b. 2
c. 3
d. 4
The Guidebook for Linemen and Cablemen 2nd Ed. Textbook, Chap. 16, Pg. 653, “Winching Failures,” Bullet 3
b. 2
