Simulated CCO Written Test Flashcards

A collection of vocabulary terms and safety standards for crane operators based on CCO core exam preparation materials.

Most unstable allowable quadrant (truck crane)

Side.

Tagline

A rope used when rotation of a load would be dangerous.

Anti-two-block prevention system

A system that will stop the crane operation to prevent damage (unlike a warning device which only warns).

Mats or cribbing

Materials used to reduce ground pressure.

RT crane tipping capacity (retracted outriggers)

Based on $75\%$ of tipping.

Load radius

The distance from the center of rotation to the center of gravity of the suspended load.

Boom extension primary reason

To increase height.

Minimum design factor (Right regular lay main hoist)

$3.5$.

Net capacity

Gross capacity minus capacity deductions.

Structural competence (Load Chart)

Indicated when rated capacity is above the solid line, in shaded areas, or has an asterisk.

Running wire rope removal (one strand)

Requires removal from service if $3$ broken wires are present in one strand of one lay.

Standard crane rope

Right regular lay.

Counterweight safety

Fencing or barricading the swing area to prevent injury.

Outrigger extension requirement

Should only be less than fully extended if there is a specific load chart for that operation.

Rubber-tired crane rating

$75\%$ of tipping.

Backward stability test

Tested with basic boom at maximum angle with no load.

Parts of line

The number of vertical lines running between the load block and boom tip.

Standing wire rope removal (one lay)

Requires replacement if there are $2$ broken wires between end sockets in one lay.

Man basket test pick duration

Must be maintained for $5\text{ minutes}$.

Power transfer to swing

Through a pinion gear.

LMI requirement threshold

Required on cranes with a lifting capacity of $3\text{ tons}$ and above.

Frequent inspection

Daily to monthly.

Periodic inspection

Monthly to annually.

Test load limit

Shall not exceed $110\%$ of manufacturer load ratings.

Maximum crane hook twist

$10\text{ degrees}$.

Maximum hook throat opening

$15\%$ of its original size.

Jib Offset

The jib angle relative to the boom.

Least ground pressure quadrant (mobile truck crane)

Side.

Basket hitch capacity

$200\%$ of a vertical hitch's capacity.

Pendant wire rope removal (end connection)

$1$ broken wire at the end connection.

Luffing Jib

A jib that works independent of the main boom.

Rotation resistant wire rope internal damage sign

Shrinkage in rope diameter.

Telescopic boom angle

The angle measured between the centerline of the loaded boom and the horizontal.