What is the operators main concern during crane operations?

The crane operator must obey a stop (or emergency stop) signal no matter who gives it. The operator also has the authority to stop operation whenever there is a concern as to safety. The operator can refuse to handle loads until a qualified person has determined that safety has been assured.

What may cause the bridge to skew?

Skew occurs in a crane system when the bridge fails to remain strictly perpendicular to the runway. Skew causes uneven and accelerated wear to the wheels and rails. This can result in differing diameters of drive wheels which in turn, can cause the crane to skew even more.

Which of the following tags prohibits operation of equipment when its operation could jeopardize the safety of personnel or endanger equipment?

The red danger tag prohibits operation of equipment when its operation could jeopardize the safety of personnel or endanger equipment.

What is the bridge crane communication hand signal pictured with the arm extended forward hand open and slightly raised making a pushing motion?

The bridge crane communication hand signal pictured, with the arm extended forward, hand open and slightly raised, making a pushing motion is Bridge travel. This answer has been confirmed as correct and helpful.

What is a crane operator responsible for?

Crane operators control lifting machinery using buttons, levers, and pedals. They attach loads to hoists and cranes and safely remove them. Occasionally, they set up and repair equipment.

What are three functions of a crane?

A crane is a type of machine, generally equipped with a hoist rope, wire ropes or chains, and sheaves, that can be used both to lift and lower materials and to move them horizontally. It is mainly used for lifting heavy things and transporting them to other places.

Why is it important to have bent or dented crane boom members inspected and evaluated?

It is important to have bent or dented crane boom members inspected and evaluated because they can greatly reduce the strength of a boom, possibly resulting in sudden collapse of the boom. Gantry, Pendants, and Boom Stops Check the condition of the gantry, pendants, and boom stops.

What is Bridge skew?

Skewed bridges are commonly used to cross roadways, waterways, or railways that are not perpendicular to the bridge at the intersection. Skewed bridges are characterized by their skew angle, defined as the angle between a line normal to the centerline of the bridge and the centerline of the support (abutment or pier).

What’s the definition of skewing?

1: set, placed, or running obliquely: slanting. 2: more developed on one side or in one direction than another: not symmetrical.

What are the 5 principal parts of Category 1 and Category 4 cranes?

Crane Components The principal parts of most Category 1 and Category 4 cranes are: the boom, machinery house, roller path or rotate bearing, supporting structure, and travel system.

What are the 3 types of spot checks?

There are three types of spot checks; historical, maintenance validation, and monitored maintenance.

What are Category 1 crane types?

Category 1 cranes come in a wide variety of sizes and configurations and include: portal cranes, hammerhead cranes, locomotive cranes, derricks, YD floating cranes*, tower cranes, container cranes, mobile cranes, aircraft crash cranes, mobile boat hoists including self-propelled and towed types, and rubber-tired gantry

What marking must be clearly visible on a crane?

Answer: Point with a finger in direction of swing of a boom.

What hand signal means move slowly?

LOWER BOOM: Arm extended, fingers closed, thumb pointing downward. MOVE SLOWLY: Use one hand to give any motion signal and place other hand motionless in front of hand giving the motion signal (hoist slowly shown).