Hoist Systems and Their Mechanisms

<p>Built-in runways (C)</p> Signup and view all the answers

<p>Free-standing runways (C)</p> Signup and view all the answers

<p>Suspended runways (B)</p> Signup and view all the answers

<p>They are more stable and less prone to vibration. (C)</p> Signup and view all the answers

<p>Free-standing runways (C)</p> Signup and view all the answers

<p>Pneumatic hoists require a specialized and readily available air supply. (B)</p> Signup and view all the answers

<p>Pneumatic hoists offer a higher degree of safety and explosion resistance in certain environments. (B)</p> Signup and view all the answers

<p>An electric motor driving a hydraulic motor. (C)</p> Signup and view all the answers

<p>Hydraulic hoists provide a quieter and smoother lifting experience. (B)</p> Signup and view all the answers

<p>Use in intrinsically safe hazardous environments. (B)</p> Signup and view all the answers

<p>The ability to operate without any electrical connections, reducing the risk of sparking. (B)</p> Signup and view all the answers

<p>To generate hydraulic pressure that drives the lifting mechanism. (D)</p> Signup and view all the answers

<p>Generally quieter operation compared to electric hoists. (B)</p> Signup and view all the answers

<p>Allows for variations in lifting height. (A)</p> Signup and view all the answers

<p>2 tonnes (D)</p> Signup and view all the answers

<p>Assembling the gantry structure. (D)</p> Signup and view all the answers

<p>Foldaway Gantry (B)</p> Signup and view all the answers

<p>Adjustable Height Gantry (A)</p> Signup and view all the answers

<p>They require external equipment for assembly. (A)</p> Signup and view all the answers

<p>Self-Erecting Gantry (A), Adjustable Height Gantry (C)</p> Signup and view all the answers

<p>Its main purpose is to allow for variations in lifting height. (D)</p> Signup and view all the answers

<p>It runs on top of rails that are part of its supporting structure. (D)</p> Signup and view all the answers

<p>Some bridge and gantry cranes. (B)</p> Signup and view all the answers

<p>Situations where existing building structures can support the tracks. (B)</p> Signup and view all the answers

<p>Suspended from a carrier beam. (B)</p> Signup and view all the answers

<p>Intermittent welding. (A)</p> Signup and view all the answers

<p>A semi-portal gantry crane is only partially supported by a rigid structure, while a portal gantry crane has a fully rigid frame. (A)</p> Signup and view all the answers

<p>Channel section (A), I-beam (B)</p> Signup and view all the answers

<p>To enhance the strength of the supporting structure. (C)</p> Signup and view all the answers

<p>Nylon rope (B)</p> Signup and view all the answers

<p>24-50 volts AC or DC (B)</p> Signup and view all the answers

<p>The collecting box restricts the maximum lifting height (D)</p> Signup and view all the answers

<p>Chains are more flexible than wire ropes (D)</p> Signup and view all the answers

<p>The wire rope cannot be wound onto the drum beyond a certain point (B)</p> Signup and view all the answers

<p>The weight of the load to be lifted (C)</p> Signup and view all the answers

<p>To enhance safety for operators (A)</p> Signup and view all the answers

<p>They may not have LV control (C)</p> Signup and view all the answers

<p>By man-power only (A)</p> Signup and view all the answers

<p>Goalpost Gantry (A)</p> Signup and view all the answers

<p>The intended use and angle of slew (B)</p> Signup and view all the answers

<p>King Post (D)</p> Signup and view all the answers

<p>A-frame gantry (B)</p> Signup and view all the answers

<p>Limited to a 270° angle of slew (D)</p> Signup and view all the answers

<p>A-frame gantry (A)</p> Signup and view all the answers

<p>High lifting capacities (A)</p> Signup and view all the answers

Hoists powered by compressed air, limited by air supply issues.

Preferred in settings needing safety and air supply for other use.

Hoists using hydraulic pressure for smooth lifting and lowering.

Drives a hydraulic motor to convert pressure into movement.

Control derived internally by a transformer, ranging from 24 to 50 volts AC or DC.

Mechanical actuator that turns hydraulic pressure into torque.

Another term for low voltage control in hoists.

Produces very little noise during operation due to design.

Materials used in power-operated hoists to lift loads.

Locations where the use of certain equipment minimizes risk of ignition.

Used in industries where safety and operational quietness are crucial.

A type of lifting media used in hoists, characterized by short links.

Another type of lifting media that consists of multiple strands of wire.

A container for housing slack chain below a hoist.

A component where wire rope is stored in hoists.

The maximum height a hoist can lift, restricted by the amount of wire rope on the drum.

Systems that manage the operation of equipment remotely or centrally.

Control options that utilize radio signals for remote operation.

Controls that use infrared signals to operate equipment without direct contact.

Wall-mounted controls allowing operation from different locations.

Buttons designed to override controls and stop equipment immediately.

Runway beams supported by existing building structures.

Runways that hang from roof members or beams in buildings.

Stand-alone structures for runways when no support is available.

A design that has excessive structural support, often more than necessary for stability.

A design that lacks sufficient structural support, making it less stable.

The angle at which a jib or gantry can rotate, affecting its range of motion.

Structures that do not require additional support and can rotate to a specified angle.

A portable structure made of a runway beam and supports, used where permanent installation is not viable.

A type of mobile gantry with a runway beam and single column supports, limited to light loads.

A common type of mobile gantry with A-shaped supports, providing stability and capable of heavier loads.

The resistance to sideways movement, crucial for ensuring structures do not tip over.

A gantry with telescopic supports for varying height.

This gantry design is not intended for lifting loaded weights.

A gantry designed for easy dismantling and storage.

Typically limited to lifting loads of up to 2 tonnes.

A gantry that uses hand winches for assembly.

Winches pull side members to bring the gantry upright.

Different gantry types allow for specific lifting height needs.

Adjustable height gantries can handle loads typically up to 5 tonnes.

Structural components are inserted to make a crane rigid.

Tracks for cranes manufactured from standard constructional sections.

Gantry cranes supported from above, running on the top of rails.

Crane running on the bottom flanges of its tracks.

Rails that support crane movement, often fixed by welding.

Cranes for lifting and transporting loads, often electrically powered.

A type of gantry crane partially resting on the ground.

In top running cranes, the rail is welded to the top flange of the beam.