__________inch minimum length block should be used with 7/8-inch rope.
7
According to the Florida Contractors Manual, excavations
less than ____________ feet in depth do not
need shoring.
5
The required depth for a 5/8-inch eyebolt is ____________.
15/16 inches
The contractor has to lift 1,800 pounds using block and tackle. The
angle will be 90 degrees. The maximum load the contractor can lift
using the given information is ____________
pounds.
2,538
The required depth for a 1/2-inch eyebolt is ____________ inches.
3/4
The contractor has to lift 1,600 pounds using block and tackle. The angle will be 80 degrees. The maximum load the contractor can lift using the given information is ____________ pounds.
2,448
The diameter of the eyebolt is 5/8 inches. The depth of the hole should be ____________.
15/16
The safe working load of 1/2 inch manila rope in pounds is ____________
Less than 400
The safe working load of Grade 110/120 Improved Plow Grade steel core 3/4-inch rope is ____________ pounds.
9,560
The safety factor for the 1/2-inch rope is 6. The SWL using the general rule is ____________ ton(s).
1.5
The maximum allowable slope (H:V) for an excavation less than 20 feet deep for soil or rock type "C" is ____________.
1/2:1
The tapped hole for a 3/4-inch eyebolt should be ____________ inches.
1 1/8
Nylon is often used to make ropes because it has ____________ times the strength of manila.
2 1/2
The toggle block angle is 90 degrees. The weight is 1,800 pounds. The weight on the toggle block is ____________ pounds.
2,538
The excavation is 10 feet by 10 feet by 15 feet deep. The excavation was made in Type "C" soil. The measurements at the top of the excavation are ____________.
55 feet by 55
There are ____________ grades of commonly used manila rope.
6
Given an 8-inch block, the rope diameter size should be
7/8 to 1 inch
The contractor is lifting 1,800 pounds. The load on the toggle block will be ____________ pounds. The angle is 90 degrees.
2,538
The contractor must lift 800 pounds of material to the rooftop. The
contractor should use rope with a breaking strength of ____________
pounds.
4,000
A 6-inch sheave diameter when using a 3/4-inch rope will produce a
strength efficiency of ____________
percent?
83
Spelter sockets will usually provide ____________
percent reliability.
100
When hoisting personnel, a safety factor of____________
should
be used for rigging operations.
10
Charlic is installing a 5/8-inch cycbolt. Charlie should drill the hole____________ inches deep.
15/16
When pulling with a rope in other than a straight-line, the contractor may expect a/an
A fifty-percent reduction in strength
An 8-inch block requires a rope diameter of____________
inches maximum.
1
Nylon ropes should only be used in which of following?
Wet locations
Thayer Rope, Inc. sold a rope with a 4,000-pound capacity to 1 Exam Prep. The rope factor was 4:1. The maximum safe load 1 Exam Prep may lift with the rope is
1,000 pounds
When acting as a signaler, which of the following is not allowed?
Placing a signaler on each side of the crane
Bob is using a braided sling with a hook. The maximum percent from
plane twist allowed from the
throat is
10
At which of the following angles, measured from the vertical, would a sling have the highest load carrying capacity?
30
According to the Florida Contractors Manual, when unloading materials for storage on the project site, sling angles should be kept at a minimum of ____________ degrees.
45
Using a 6x37 classification of wire rope, Grade 100/110 Plow with a steel core, you would need a ____________ diameter rope to carry a 20,000 lbs. load.
1-1/8"
Synthetic fiber ropes are not generally used in roofing because of the tendency to
Stretch
The reduced capacity of a multiple leg sling with a rated cap of
2,000 pounds at an angle of 45
degrees is____________ pounds.
1,414
According to I, for general rigging, the Safety Factor is____________ for materials.
5
A contractor needs to determine the safe working load of a 3⁄4" nylon rope. There are no manufacturers' charts or tables for the contractor to refer to. The mathematical safe working load (SWL) calculation would yield a SWL of____________ lbs.
2,160
Wire rope with a tensile strength of 224,000 - 246,000 PSI is referred to as
grade 100/110, plow steel
The safe working load (SWL) for a rope with a breaking strength of 2000 lbs. is ____________ lbs. if the rope is being used to hoist materials.
400
If at all possible, keep sling angles greater than
45°
The single most important rigging precaution is determining____________ before attempting to lift them.
the weight of the loads
When manufacturer's charts are not available, SWL can be calculated by dividing the_________ by the_________.
breaking strength, factor of safety
What is the SWL of 7/8" nylon rope?
2,940 lbs.
What is the SWL of 3/8" nylon rope?
What is the SWL of 3/8" nylon rope?
What is the SWL of 3/8" polyethylene rope?
315 lbs.
What is the SWL of 1/2" nylon rope?
960 lbs.
Which of the following manila rope grades is the standard hoisting rope, and usually has an identifying trademark?
Number 1 grade
Which of the following is not one of the most commonly used rope splices?
sailor splice
Fiber ropes are made from
both natural and synthetic fibers
Which of the following is true?
A. Safe Working Load = Breaking Strength + Factor of Safety
B. Safe Working Load = Breaking Strength + Factor of Safety
C. Breaking Strength - Factor of Safety Safe Working Load
D. Safe Working Load + Breaking Strength = Factor of Safety
A. Safe Working Load = Breaking Strength + Factor of Safety
According to the Florida Contractors Manual, for general rigging, the Safety Factor is_________ for personnel.
10
For safe rope use,
avoid all but straight line pulls
In general, all running ropes (except elevator ropes) in continuous service must be inspected
once every working day
The breaking test of 7/8" dacron rope at 25.0 lbs. per 100 feet is ______lbs.
18,000
The maximum working load of 7/8" dacron rope at 25.0 lbs. per 100 feet is______ lbs.
1,980