Practice test A

Question 1, 2-way bridle

A symmetric 2-leg bridle hangs from two beams 20 ft apart. The apex is centered and 10 ft below the beams. The load is 1,000 lb. What is the tension in each leg?

Question 2, 2-way bridle

At what included angle does each leg of a symmetric 2-leg bridle carry a tension equal to the full load?

Question 3, 2-way bridle

Beams A and B are 12 ft apart at the same height. The apex is 4 ft horizontally from beam A and 6 ft below the beams. Load: 2,000 lb. What is the tension in the leg to beam A?

Question 4, 2-way bridle

Same bridle as the previous question. What vertical force does beam B receive?

Question 5, Sling length

A bridle leg runs 9 ft horizontally and 12 ft vertically from the beam to the apex. Ignoring hardware, what is the leg length?

Question 6, Conversions

A video wall weighs 500 kg. What is its weight in pounds?

Question 7, Conversions

A trim height is specified as 12 m. What is that in feet?

Question 8, Design factor

A wire rope has a nominal breaking strength of 14,400 lb. Using a design factor of 8:1, what is its working load limit?

Question 9, Efficiency

A wire rope with a breaking strength of 9,800 lb is terminated with a fitting rated at 80% efficiency. With an 8:1 design factor, what is the WLL of the assembly?

Question 10, D/d ratio

A 1/2 in wire rope is bent around a 12 in diameter pipe. What is the D/d ratio?

Question 11, Shock load

A 1,000 lb load free-falls 2 ft and is stopped in 2 in. Using F = W × (1 + fall distance / stopping distance), what is the peak force?

Question 12, Beam loads

A 2,000 lb point load hangs 5 ft from the left end of a 20 ft simple span. What is the reaction at the left support?

Question 13, Beam loads

A 40 ft truss weighing 25 lb/ft hangs from points at each end. A 300 lb fixture is hung 10 ft from the left end. What load does the left point carry?

Question 14, Indeterminate loads

A continuous truss with a total uniformly distributed load of 2,400 lb hangs from three evenly spaced points. Approximately how much does the center point carry?

Question 15, Center of gravity

A 30 ft truss (600 lb, uniform) carries 400 lb at 5 ft and 200 lb at 25 ft, both measured from the left end. Where is the combined center of gravity?

Question 16, Breast lines

An 800 lb load is pulled offstage with a horizontal breast line so it ends up 5 ft horizontally and 15 ft vertically from its suspension point. What is the force in the breast line?

Question 17, Fleet angle

A rope leaves a drum 1 ft to the side of the head block's centerline, and the block is 40 ft away. What is the fleet angle?

Question 18, Operations

What does it mean to “float” a load?

Question 19, Knots

Which knot forms a fixed loop at the end of a hand line that won't slip or bind under load?

Question 20, Knots

Which knot is used to join two ropes of different diameters?

Question 21, Operations

What is the main purpose of a bump check before a lift?

Question 22, Electrical

A three-phase chain hoist runs in the opposite direction from the others on the same controller. What is the usual cause?

Question 23, Hardware

When two bridle legs are joined with a shackle, where should the legs go?

Question 24, Fall protection

Under OSHA, a personal fall arrest anchor that is not part of an engineered system must support at least how much per attached worker?

Question 25, Hardware

When installing U-bolt wire rope clips, where does the saddle go?