Uncategorized Mobile Crane Operator 1

Question 1

According to OSHA 1926.1416, what is the minimum frequency at which wire rope on running rigging must be inspected?

Accepted Answer

Before each shift or at the start of each day of use

Answer

Once per month

Answer

Once per week

Answer

After every 40 hours of use

Question 2

A signal person uses the following signal: arm extended horizontally, forearm vertical, hand open, and fingers pointing up — then moves the hand in small horizontal circles. What does this signal mean?

Accepted Answer

Use main hoist

Answer

Hoist slowly

Answer

Dog everything (stop)

Answer

Travel (move the crane)

Question 3

When determining whether ground conditions are adequate for crane operations, which factor is MOST critical to evaluate before setting outriggers?

Accepted Answer

The bearing capacity of the ground relative to outrigger load

Answer

The color-coded soil classification on the site survey

Answer

The distance from the outriggers to the nearest utility line

Answer

The manufacturer's recommended outrigger pad color

Question 4

Under OSHA 1926.1407, before any part of a crane can operate closer than 20 feet to a power line rated above 350 kV, what must the employer do?

Accepted Answer

De-energize and ground the power line, or confirm a minimum clearance with the utility owner

Answer

Install a proximity alarm on the boom tip

Answer

Post a warning sign visible from the cab

Answer

Assign two signal persons — one on each side of the crane

Question 5

What is the purpose of an anti-two-block (ATB) device on a mobile crane?

Accepted Answer

It automatically stops hoist motion before the hook block contacts the boom tip or sheave

Answer

It prevents the crane from swinging past 360 degrees of rotation

Answer

It limits the load line from exceeding the rated capacity shown on the load chart

Answer

It locks the outriggers in the fully extended position during lifts

Question 6

When operating a mobile crane, wind speed must be monitored because high winds can affect the rated capacity. According to general industry guidance, at what sustained wind speed should a crane operator typically consult the manufacturer's load chart for wind derating or cease operations?

Accepted Answer

20 mph

Answer

15 mph

Answer

30 mph

Answer

40 mph