Nccco Core Comprehensive Exam

Nccco Core Comprehensive Exam Graded A+ 750 kV to 1000 kV - ANSWER-20 feet A common practice to reduce boom torque is - ANSWER-Reeve the lines symmetrically A crane component made by crane company can be used on any other crane made by the company - ANSWER-False A crane is set up with three of us for outriggers fully extended and the fourth retracted unless the manufacturer states otherwise the capacity of the crane in this configuration will be found in the - ANSWER-On Rubber chart A crane must stay at least from energize powerlines under 50 Kv - ANSWER-10 feet A crane operator must respond to a stop signal from - ANSWER-Eveyone A crane performing personal lifts must not exceed of its rated capacity - ANSWER-50% A crane sitting 3° off level can increase the boom stress by 50% - ANSWER-True A cranes quadrants of operation is - ANSWER-Different depending on the manufacturers load chart A Jibbs offset is the Jibbs angle to the - ANSWER-Boom A load applied at an angle to the vertical plane of the boom is referred to as - ANSWER- Side load///// when you pick some thing not being directly over the Center of the load A luffing jib on a conventional or hydraulic crane will - ANSWER-Boom up or down independently of the main boom A periodic inspection is made - ANSWER-Monthly to annually A rough terrain crane is commonly referred to as - ANSWER-Cherry picker A shift inspection must be completed - ANSWER-Before the end of shift A standard hand signal chart must be posted conspicuously at the job site the ideal spot for the chart is - ANSWER-On the crane A sudden change in the speed of the left and attachments will produce a - ANSWER- Shock load 1 / 3

A sudden start or stop while operating a crane produces - ANSWER-A dynamic load A sudden start or stop while operating a crane produces a - ANSWER-Dynamic load A truck crane is operating with his outriggers fully extended and set does not have a fifth front Outrigger the operator should - ANSWER-Referred to the manufactures working area diagram A truck crane is rated at what percentage of its load capacity - ANSWER-85% According to be 30.5 mobile crane standard it's OK for an operator to leave the cab of a crane with the engine running so long as - ANSWER-The operator keeps the crane in view and restricts access to the area around the crane AcCording to Inzi personal platform lift should not be made with wind an excess of - ANSWER-20 mph According to OSHA all cranes equipped with a luffing jib must have - ANSWER-Check valve After the crane has been checked out and before lift operations begin the crew should - ANSWER-Have a pre-lift meeting All bridals and rigging used for personal hoisting cannot be used and for any other hoisting activities - ANSWER-True All cranes equipped with a torque converter must have a - ANSWER-Clutch reachable from the operators station All hazards and potential problems should be discovered - ANSWER-Pre-operational work site inspection All load test shall not exceed what of the manufacturers rated capacity - ANSWER- 110% An abrupt stop of a rapid swing on a long boom crane will produce what major affect - ANSWER-Possible overturning the crane or collapsing the boom And a range diagram boom length of an angle can be used to determine - ANSWER- Load radius And Outrigger float should be approximately how much larger than Outrigger pad - ANSWER-3x 2 / 3

Any gate or means of access/egress in a personal basket must not - ANSWER-Swing outward As the layers of rope on a drum increase the allowable line Pull wil - ANSWER- Decrease Backward stability of a crane is tested with - ANSWER-Basic boom at maximum angle with no load Backward stability on a mobile crane can become an issue when the crane is working - ANSWER-Over the side at a minimum radius Basket hitch is rated of a vertical hitch - ANSWER-200% Before arriving at the job site with a crane and sure the cranes blank is adequate - ANSWER-Set up location Before leaving his crane unattended the operator must - ANSWER-Land the load set all dogs and pawls and shut the engine Before lifting a rated load the operator shall - ANSWER-Left the load a few inches off the ground and apply the brake Before performing a lift with a personal hoist the following must be done - ANSWER- Trial pick Proof lift Pre-lift meeting Blocking cribbing may be placed under the Outrigger beams - ANSWER-Never they go under the pads Blocking may be placed under the tips of the tracks on a crawler crane to - ANSWER- Increased ability over the front or rear Blocking under floats shall be - ANSWER-Sufficient to support the crane and the load Boom angle is best described as - ANSWER-The angle between the loaded boom and the horizontal Boom connecting pins should be installed - ANSWER-From the inside out Boom extensions and Jibbs are used - ANSWER-To increase height Boom hoist sheaves shall have a minimum pitch diameter of - ANSWER-15 times rope diameter

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