NCCCO Telescopic Boom Crane Lattice Boom Crawler Crane Exam Review Questions and Answers

Boom trucks normally do not have capacities in which operating area? - over the front What action can cause the lattice boom to topple backwards - swinging from the downhill side to the uphill side (When out of level) order of hitch strength, which is the correct answer - Basket, vertical, choker When taking aside strain on aboom, what concerns the operator most? - Boom damage You should always have at least how many wraps on a hoist drum - 3 On a load chart, values above the bold line mean: - Capacities based on structural competence The primary purpose for a rooster sheave or auxiliary boom point sheave is to: - Separate the hoist lines When the number of layers of rope on a drum increases the: - Allowable line pull decreases What is the minimum a towable distance from the crane and powerlines under 50kV? - 10ft Side loading may be caused by - Starting or stopping the swing too rapidly Eccentric main boom tip reeving causes: - Twisting of the boom How many randomly broken wires must there be ot remove a running wire rope from service - 6 What is the safety factor required when using non-rotating wire rope and lifting personnel in a man basket - 10 Who has the responsibility for determining the correct weight of a load - Supervisor According ot ANSI B30.5 personnel pla form lifts should not be made with wind in excess of: - 200mph During set up how do you determine machine clearances (counterweight. boom. outrigger - Load chart When operating a crawler crane, what si the most unstable allowable quadrant of operation - Side When operating a truck crane, what si hte most unstable allowable quadrant of operation - Front What is not a good location for crane set up? - Above utilities When should a tagline be used? - When rotation of load would be dangerous When an operator arrives at the jobsite and the crane is already erected, how would the operator check the main and auxiliary hoist brakes - Lift the load off the ground and apply the brake Why use mats or cribbing - To reduce ground pressure Tipping capacities of crawler cranes are based on what percentage of tipping - 75% Should the load be applied when determining the proper boom angle - Yes Load radius si the distance from the center of gravity of the suspended load ot the: - Center of rotation What si the minimum design factor required for a right regular lay main, boom or auxiliary hoist rope - 3.5 When telescoping the boom section of an R/T, which section should be telescoped first - All sections should be telescoped equally When first arriving on the jobsite, the eperator should first determine the condition of the: - Acess roads fI the rated capacity of the crane si above the solid line or within the shaded areas or has an asterisk next to it, this means the capacity is based on: - Structural competence How many broken wires must be present ni one strand of one lay for running wire rope to be removed from service - 3 In a range diagram, boom length and angle can be used ot determine: - Load radius When making a multiple crane lift, it is importani for the operator to understand that: - Weight may increase if other cranes land their load If a crane si not setup levei and the operator swings a load from the high side ot the low side, the load radius will - Increase Most crane manufacturers reduce load capacity for duty-cycle operations because: - Side loading forces may occur What is the standard rope used on most cranes - Right regular lay The proper way to calibrate a boom angle indicator is: - Using a level, raise the boom to horizontal and set the indicator at 0 degrees Only approved attachments or extra counterweights made by the manufacturer should be placed on the rear of the crane because: - They could cause a backward stability problem When working on outriggers, the only time they should be less than fully extended is when: - There is a load chart for this operation What is required to be on a Hydraulic Crane in order to lift a manbasket - Boom length indicator When working on rubber, cranes are rated at what percentage of tipping? - 70% When using cable or nylon spreaders. ti is important to remember: - The lower the spreading angle the greater the tension Backward stability of a crane is tested with - Basic boom at maximum angle with no load When aspinning load presents adanger, the operator should: - Use a tagline If a jib is erected but not being used, ti is treated as a deduction from the crane's: - Gross capacity What si the maximum number of broken wires acceptable before replacement on a standing wire rope? - 2 What are most jib's capacities based on - Structural On the majority of conventional cranes, hte power si transferred to the torque converter by :a - Master clutch During disassembly of a long boom, the hog lines are connected at the maximum cantilever point and the boom is slightly lifted of the ground. Which pins are to be removed next? - Bottom pins dead of cantilever point When using load/capacity charts, what does the term "jib angle ot ground" refer to? - Main boom angle minus jib offset