NCCCO Mobile Crane

In crane site evaluation, what does the term "ground conditions" most directly include?

• AOnly whether the surface looks dry
• BThe ability of the ground to support the equipment, including slope, compaction, and firm…
• COnly the thickness of the outrigger pads
• DThe weather forecast for the shift

Why should an operator verify each crane motion with no load before the first lift of the shift or after changing control stations?

• ATo warm hydraulic oil so the chart increases
• BTo confirm each control moves the crane in the expected direction
• CTo measure exact hook weight
• DTo recalibrate the load chart automatically

What is the primary function of a boom angle indicator on a mobile crane?

• AIt measures the boom's angle relative to horizontal
• BIt measures the load radius at ground level
• CIt automatically prevents the boom from lowering too far
• DIt records the crane's swing position

A generic load chart lists 18,500 lb at 25 ft radius and 15,200 lb at 30 ft radius for the same boom length. If the actual operating radius will be 27 ft, which capacity should be used?

• A18,500 lb
• B15,200 lb
• CAverage the two values and use 16,850 lb
• DUse either value because 27 ft is between them

Before a mobile crane is assembled or used, the setup area must be:

• AFlat enough to look level from the cab
• BFirm, drained, and graded enough to meet support and level requirements
• CCovered with gravel, regardless of soil below
• DApproved only by the signal person

When the operator cannot see the load, the landing area, or the path of travel clearly, what is the best operational control?

• ARely on coworkers near the load to shout corrections
• BUse one designated signal person or another agreed communication method
• CMove the load faster so blind time is reduced
• DContinue as long as the hook remains level

What best distinguishes a load moment limiter from a load moment indicator?

• AA limiter can disable functions that worsen an overload, while an indicator mainly displa…
• BA limiter only works on lattice boom cranes, while an indicator only works on hydraulic c…
• CA limiter measures hook height, while an indicator measures boom length
• DThere is no practical difference between them

For a 35 ft radius, a generic chart shows 12,600 lb at 80 ft boom and 10,900 lb at 90 ft boom. If the crane is set at 84 ft boom, which chart value should govern?

• A12,600 lb from the 80 ft boom row
• B10,900 lb from the 90 ft boom row
• CThe average of the two values
• DEither value if the crane is level

Which item is a supporting material used to help a crane bear on the ground safely?

• ABarricade tape
• BOutrigger mats or cribbing
• CA warning sign
• DA load chart binder

Who may give a stop signal to a mobile crane operator during a lift?

• AOnly the lift director
• BOnly the designated signal person
• CAnyone who sees a hazard
• DOnly another certified crane operator

What hazard is an anti-two-block device intended to prevent?

• AThe load swinging into the crane cab
• BThe upper block or overhaul ball contacting the boom tip or upper sheave area
• CThe boom telescoping while under load
• DThe counterweight striking an obstruction during swing

A chart cell shows 9,000 lb, but a footnote says capacities above 70 ft boom require the swingaway jib to be removed, and the jib is still installed. What governs?

• AThe 9,000 lb cell governs because numbers override notes
• BThe footnote governs, so the configuration must comply before using the capacity
• CEither one may be used if the operator has experience
• DUse half of 9,000 lb to be safe

When a project has a controlling entity, who must ensure the needed ground preparations are provided for crane setup?

• AThe controlling entity
• BOnly the crane manufacturer
• COnly the signal person
• DThe nearest utility owner

Radio communication becomes broken and difficult to understand while the load is moving through a tight area. What should the operator do?

• AContinue slowly and assume the next command will be repeatable
• BStop movement until clear communication is restored
• CSwitch to faster motions so the load clears the area sooner
• DIgnore the signal person and finish the lift by sight

Why does adding parts of line to a hook block help on heavier picks?

• AIt increases counterweight automatically
• BIt increases maximum boom angle
• CIt distributes the load across more rope parts and the block system
• DIt shortens the operating radius

A crane's chart lists 14,000 lb over rear and 11,500 lb over side for the same boom length and radius. The planned swing path starts over rear and ends over side. Which capacity should govern the lift?

• A14,000 lb
• B12,750 lb
• C11,500 lb
• DIt depends only on the starting position

Site drawings show an abandoned tank beneath the planned crane setup area. What information should be passed to the crane user and operator?

• AOnly the posted site speed limit
• BThe location of the underground hazard beneath the setup area
• CThe serial number of the nearest power pole
• DThe name of the soil testing company only

A designated signal person gives one command while another worker gives a different motion command at the same time. What is the correct response?

• AFollow the louder voice
• BAverage the two commands and move cautiously
• CStop operations until the signal path is clarified
• DFollow whichever person is closest to the load