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NCCCO Mobile Crane Terminology Test Study Guide.
Accessory - Answer✔A secondary part or assembly of parts which contributes to the overall function and usefulness of a machine.Appointed - Answer✔Means assigned specific responsibilities by the employer or the employer's representative.ANSI - Answer✔American National Standards Institute.Angle indicator - Answer✔An accessory which measures the angle of the boom to the horizontal.Axis of rotation - Answer✔The vertical axis around which the crane superstructure rotates.Axle - Answer✔The shaft or spindle with which or about which a wheel rotates. On truck- and wheelmounted cranes it refers to an automotive type of axle assembly including housings, gearing, differential, bearings, and mounting appurtenances.Axle (bogie) - Answer✔Two or more automotive-type axles mounted in tandem in a frame so as to divide the load between the axles and permit vertical oscillation of the wheels.Base (mounting) - Answer✔The traveling base or carrier on which the rotating superstructure is mounted such as a car, truck, crawlers, or wheel platform.Boom (crane) - Answer✔A member hinged to the front of the rotating superstructure with the outer end supported by ropes leading to a gantry or A-frame and used for supporting the hoisting tackle Boom angle - Answer✔The angle between the longitudinal centerline of the boom and the horizontal. The boom longitudinal centerline is a straight line between the boom foot pin (heel pin) centerline and boom point sheave pin centerline.Boom hoist - Answer✔A hoist drum and rope reeving system used to raise and lower the boom.The rope system may be all live reeving or a combination of live reeving and pendants.Boom stop - Answer✔A device used to limit the angle of the boom at the highest position.Brake - Answer✔A device used for retarding or stopping motion by friction or power means.
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