NCCCO TOWER CRANE EXAM

NCCCO TOWER CRANE EXAM

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CORRECT( DETAILED ANSWERS )

(VERIFIED ANSWERS) GRADED A

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When tower crane is erected/dismantled, written instructions must be - ANSWER-On site

Tower crane erection/dismantling shall be performed under direct supervision of the - ANSWER-Designated person

What is the minimum clearance from obstruction when the tower crane freely rotates 360•? - ANSWER-6 ft 6 in A crane is operating with a long boom, on outriggers, on uneven ground. Under these conditions it is important to - ANSWER-Block under the float or pad to achieve a 90 degree angle between the cylinder rod and the float or pad

What is the purpose of a boom length indicator? - ANSWER-Indicates the extended length of boom

According to OSHA 1926 subpart cc, floats/pads must be fastened to the outrigger/stabilizers when - ANSWER-They are in use

A crane's jib is offset 15 degrees versus it's original 0 degree offset and the boom angle remains unchanged, the load radius will - ANSWER-Increase

When leaving telescopic boom cranes unattended overnight or for longer periods, the boom should be - ANSWER-Fully retracted and stowed

On a telescopic boom truck crane that has all 5 outriggers properly positioned, the working area diagram will indicate the "over front" area is - ANSWER-Determined by the crane manufacturer

According to OSHA 1926 subpart cc, who determines if a crane can be used for pick and carry operations? - ANSWER-The manufacturer

According to OSHA 1926 subpart cc, what function does the holding valve on a vertical outrigger jack perform? - ANSWER-Hold pressure in the vertical ram if a hydraulic connection fails

When a crane's telescopic boom sections are required to be extended equally, and the are not, the - ANSWER-Longest section can be overloaded 2 / 3

With the boom extension mounted on the boom tip, the main boom rating must be reduced to compensate for the boom extension's - ANSWER-Effective weight

According to OSHA 1926.1433, which of the following must be on the crane?

• A fire extinguisher
• Anti two-block warning system
• Battery disconnect switch
• Vehicle identification number - ANSWER-A. A fire extinguisher

A carrier-mounted crane that is set up on outriggers should have the tires on the carrier

• ANSWER-Off the supporting surface

When a rough terrain crane is working on tires, backward tipping is most likely to occur when the unloaded boom is position over the - ANSWER-Side at short radius

When performing pick and carry operations with a rough terrain crane, you should keep the load - ANSWER-Positioned over the front of the carrier

In which outrigger configuration would a crane be the most susceptible to tipping from a rapidly swinging load? - ANSWER-Outriggers up and in

According to OSHA 1926 subpart cc, when extending outriggers from the crane's upper structure, the operator shall - ANSWER-Make visual contact or post a signal person

A luffing jib is - ANSWER-Raised or lowered independent of the main boom

When operating a rough terrain crane, what is the most stable quadrant of operation? - ANSWER-Front

When operating a telescopic boom truck crane, what is the most stable quadrant of operation? - ANSWER-Rear

Capacities of telescopic boom truck cranes are based on what percentage of tipping? -

ANSWER-85%

When working on rubber, a rough terrain crane's capacity is based on what percentage of tipping? - ANSWER-75%

What is the primary concern when operating rough terrain cranes on rubber at high boom angles? - ANSWER-Backward stability

During pick and carry operations, how is travel speed determined? - ANSWER- Manufacturers specifications What must the crane operator do when a load is suspended - ANSWER-Remain at the controls

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