CHST - Construction Health and Safety Technician Crane and Rigging Safety Questions and Answers

Question 1

According to OSHA 29 CFR 1926 Subpart CC, when is a signal person required for crane operations?

Accepted Answer

When the point of operation is not in full view of the operator or the operator's view is obstructed in the direction of travel.

Answer

OSHA 1926.1419(a) explicitly states a signal person must be provided when the point of operation is not in full view of the operator, the equipment's direction of travel is obstructed, or the operator or person handling the load determines it's necessary for safety.

Question 2

A rigger is inspecting a synthetic web sling before a lift. Which of the following would be cause for immediate removal from service?

Accepted Answer

The presence of knots or melting/charring.

Answer

According to ASME B30.9 and OSHA guidelines, synthetic slings must be immediately removed from service if they show signs of melting, charring, knots, or acid/caustic burns, as these conditions severely compromise the sling's integrity.

Question 3

A construction site supervisor is developing a critical lift plan. Which of the following situations would OSHA define as a critical lift, requiring such a plan?

Accepted Answer

Lifting a load that exceeds 75% of the crane's rated capacity.

Answer

OSHA defines a critical lift as one that exceeds 75% of the rated capacity of the crane or involves the use of more than one crane. While other factors may be included in a company's specific plan, exceeding 75% capacity is a primary OSHA trigger.

Question 4

During a multi-crane lift, what is the most crucial element of communication between the crane operators and the lift director?

Accepted Answer

Ensuring all operators are on the same, dedicated radio channel.

Answer

For multi-crane lifts, effective and clear communication is paramount. OSHA requires a dedicated means of communication, such as a radio channel, for the lift director to coordinate with all operators simultaneously to ensure a safe and synchronized lift.

Question 5

What is the primary purpose of using outrigger pads or crane mats?

Accepted Answer

To distribute the crane's load over a larger area to ensure ground stability.

Answer

The primary safety function of outrigger pads or mats is to distribute the concentrated load from the outrigger floats over a larger surface area. This prevents the ground from failing, which could lead to the crane becoming unstable and tipping over.

CHST - Construction Health and Safety Technician Practice Test

CHST - Construction Health and Safety Technician Practice Test

CHST - Construction Health and Safety Technician Crane and Rigging Safety Questions and Answers