Crane basic knowledge Questions and Complete Solutions Graded A+

  How does the operator verify LMI boom length or radius reading - Answer: Actual measurements On whose recommendation should a preventative maintenance program be set up - Answer: Crane manufacturer The proper way to calibrate a boom angle is - Answer: Use a protractor Eccentric main boom tip reeving causes_________ - Answer: Twisting of boom Frequent inspection - Answer: daily, monthly Load tests for cranes should not exceed ________% of manufacturers ratings - Answer: 110% B30.5 requires load indicator on cranes when it's max capacity exceeds - Answer: 3 tons Where does OSHA 1926.1422 require hand signals to be posted - Answer: On the outside of crane According to OSHA 1910.180 are cranes allowed to be overloaded - Answer: Yes but only in testing and not over 110% rated capacity What is the maximum ammount of twist allowed in a hook - Answer: 0 degrees What is the max amount of hook throat can open up - Answer: 5% According to OSHA 1926.1412 who can do an annual inspection - Answer: Qualified person According to 1926.1412 an operator aid shall be inspected and tested every _______ - Answer: 12 months The primary purpose for a rooster or auxiliary boom point - Answer: Separate hoist lines When the number of layers of rope on a drum increases the - Answer: Line pull decrease's Excessive side loading of booms by a freely suspended load is caused by _______ - Answer: Starting or stoping the swing too rapidly How do out riggers increase the tipping capacity of a crane - Answer: By moving tipping axis further away from the center of crane You plan to pick a 36,500lb load. line pull on the crane is 9000lb how many parts of line will you need - Answer: 5 Boom length is measured from the - Answer: Boom hinge pins, to the center of boom tip sheave Periodic inspection - Answer: Monthly to annually When radius increases the boom angle will - Answer: Decrease Capacity's below the bold line on the load chart are based on - Answer: Stability of the crane When the heavy load is lifted the radius will - Answer: Decrease Who is responsible for providing the correct load weight and radius - Answer: Lift director What is the most important factor when determining a cranes capacity - Answer: Radius Who is a operator required to follow a stop singnal from - Answer: Anyone When hosting personnel how much must the gross lord be reduced by - Answer: 50% Where should level be placed when leveling a crane - Answer: Upper works The correct load chart of the crane is determined by - Answer: The serial number What is the minimum distance a crane must be from 50 kv or less powelines - Answer: A boom length and 10 feet away Wich area of a crane is required to be barricaded - Answer: Swing radius of the outermost body of the crane What OSHA standards govern mobile cranes - Answer: OSHA 1925.1400 What happens to your lift capacity when you Reeve additional parts of line - Answer: It increases T/F high winds can create a backwards stability problem for cranes - Answer: True When are operators required to wear seat belts in crane - Answer: Only when traveling What must the crane operator determine before determining block requirements - Answer: Maximum ground supporting pressure When are outrigger floats required to be used - Answer: Whenever outriggers are in use Which ASME standards govern mobile cranes - Answer: ASME B30.5 Cranes must be reduced to what capacity for two crane lifts - Answer: 75% OSHA requires a minimum of ______ wraps of rope on a drum - Answer: 2 What effect does boom deflection have on load radius - Answer: Increases it If your crane touches a power line how should you exit - Answer: Jump to the ground with both feet together and hop/ shuffle away What is the prohibited zone around 100 kv lines - Answer: 15 feet To avoid core slippage when cutting non rotating wire rope.________ must be done - Answer: Double seizing What effect does dynamic loading have on crane - Answer: Produces weights greater then actual load If a hoist has 6 broken wires per lay, how is one lay determined - Answer: The distance a strand travels when it makes one revolution around the core Rotation resistant rope should be replaced when - Answer: 2 broken wires in 6 rope diameters or 4 broken wires in 30 A hook is unserviceable if it's shows _______% wear in bowl - Answer: 10% A hook is unserviceable if a throat opening has an increase of _____% - Answer: 5% A hook is on serviceable if it's twisted more the _______ degrees - Answer: 0 T/F When placing a hook on a shackle pin the shackle pin should be up - Answer: True What is the strongest quadrent of a boom truck - Answer: Rear When is lifting from the boom extension without outrigger allowed - Answer: Most manufacturers dont allow this When is it permissible to hold a load on the deck with a boom - Answer: Never Why are jib capacity normally based on structural strength - Answer: Because jibs will break long before the crane would tip On "out riggers" cranes capacity's is based on ______% - Answer: 85% Duty cycle - Answer: A reduction in capacity for heavy use The standard duty cycle for operations such as pouring concrete would reduce crane capacity by _____% - Answer: 20% "On rubber" crane capacity is based on ______% - Answer: 75% What effect does extending crawlers have on crane capacity - Answer: Increases When moving crane with extension erected how should you position our riggers - Answer: Extended with pads close to ground Capacity of crawler cranes is based on ____% - Answer: 75% Where does lattice boom get most of its strength from - Answer: Pendant lines Wich operation is best ground support for crawlers - Answer: Over the side Gross capacity - Answer: number on load chart Net capacity - Answer: Gross capacity minus load handling devices Gross load - Answer: Net load +load handling devices Net load - Answer: Weight of object being lifted When between listed radius what should you do - Answer: Always the next longer radius When between boom angles listed what should you do - Answer: Always the next lowest angle When between boom lengths what should you Do - Answer: Always the next smaller gross capacity