FREE MASS Test Equipment Components and Inspection Questions and Answers

Question 1

During a daily inspection of a crane's wire rope, the operator uses the "rag-and-visual" method and discovers several broken wires. According to common safety standards, which of the following conditions is a criterion for immediately removing the wire rope from service?

Accepted Answer

Twelve randomly broken wires in one lay of the rope.

Answer

Safety standards, such as those referenced by ANSI and OSHA, specify clear criteria for removing a wire rope from service. One such critical criterion is finding 12 randomly distributed broken wires within a single rope lay. While corrosion, diameter reduction, and kinking are also concerns, the specific number of broken wires is a definitive trigger for immediate replacement to prevent catastrophic failure.

Question 2

An operator is performing a pre-use inspection on a lattice boom crane and notices that a modification has been made to the boom structure. According to 520 CMR 6.09, what is required for this modification to be considered acceptable?

Accepted Answer

The modification must have the manufacturer's written approval or be certified by a professional engineer.

Answer

520 CMR 6.09(d) explicitly states that any modification made to hoisting machinery must be done with the manufacturer's written approval. If that cannot be obtained, a professional engineer must create and certify a procedure, which must be added to the equipment's permanent record. This ensures that the equipment's safety factor is not compromised.

Question 3

Which of the following safety devices is specifically required on cranes by 520 CMR 6.09 to prevent the boom from flipping over backward?

Accepted Answer

A positive mechanical boom stop.

Answer

According to 520 CMR 6.09(b), devices to prevent the boom from falling over backward must be provided on cranes. The regulation specifically states that "Cable boom stops by themselves shall not be considered as adequate for this purpose," implying the need for a positive mechanical stop.

Question 4

During a daily walk-around, an operator inspects the crane's hook. The hook must be removed from service if which of the following conditions is found?

Accepted Answer

The safety latch is missing.

Answer

The safety latch is a critical component that prevents slings and rigging from accidentally slipping off the hook. A missing or inoperable latch is a significant safety hazard and requires the hook to be taken out of service until it is repaired or replaced. While other conditions like excessive throat opening (typically 10-15%) are also removal criteria, a missing latch is a definitive defect.

Question 5

An operator is assigned to a new hydraulic excavator on a job site. Which document, according to 520 CMR 6.09, must be readily available in the cab for the operator's use at all times?

Accepted Answer

The operator's manual and relevant load charts.

Answer

520 CMR 6.09(a) requires that the manufacturer's load-rating plates or applicable load charts be kept in the cab in clear view of the operator. It also states that the operator's manual, including instructions and special hazard warnings, must be readily available in the cab at all times for the operator's use.

MASS Test Practice Test

MASS Test Practice Test

FREE MASS Test Equipment Components and Inspection Questions and Answers