Conveyor Drive Arrangements and Power Units Quiz
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Questions and Answers

What are the components of belt conveyors mentioned in the text?

  • Belt tension, motor, reducer, pulley, feed end, head end
  • Belt construction, idlers, drive arrangements, power unit, loading and discharge arrangements, belt cleaners (correct)
  • Conveyor speed, material type, conveyor length, motor power, belt width, drive arrangement
  • Bearing type, conveyor frame, belt material, motor speed, belt thickness, idler spacing

    • Where does the transported material get loaded in a basic belt conveyor?

  • Tail end (correct)
  • Head end
  • Intermediate point
  • Return strand

    • What is the primary consideration for the drive arrangement in a belt conveyor?

  • Driving the tail end drum to reduce wear on the belt
  • Using multiple drives to increase conveyor speed
  • Driving the head end drum to involve the smallest amount of belt subjected to maximum tension (correct)
  • Placing the drive at an intermediate point to evenly distribute tension

    • What does the drive arrangement in a belt conveyor primarily consist of?

    <p>Motor and reducer</p> Signup and view all the answers

    What is essential to use at the head end of belt conveyors when transporting bulk materials that tend to stick to the belt?

    <p>V-shaped plough</p> Signup and view all the answers

    What can cause the belt to run off-center and shorten its life?

    <p>Sharp particles pressed into the belt cover</p> Signup and view all the answers

    What is an effective cleaning method for sticky materials on belt conveyors?

    <p>Water spray followed by rubber wiper blades</p> Signup and view all the answers

    What does the conveying rate (C) depend on?

    <p>Belt speed and material density</p> Signup and view all the answers

    What is the surcharge angle defined as?

    <p>The angle to the horizontal which the surface of the material assumes while at rest on a moving conveyor belt</p> Signup and view all the answers

    What is the usual practice for allowing maximum lump size on a belt conveyor?

    <p>One-fifth (1/5) of the belt width for surcharge angles of 20°</p> Signup and view all the answers

    What properties of the conveyed product should be considered?

    <p>Moisture content, dustiness, and lump size</p> Signup and view all the answers

    What is the date for the final report deadline?

    <p>November 6th, 2023</p> Signup and view all the answers

    When is Quiz 2 scheduled?

    <p>November 7th at 3:00 PM</p> Signup and view all the answers

    When is the final exam?

    <p>December 9th at 2:00 PM</p> Signup and view all the answers

    Which factors affect conveyor drive efficiency?

    <p>Tension difference, friction, and angle of wrap</p> Signup and view all the answers

    How can increasing power transmission be achieved?

    <p>Increasing friction coefficient, angle of wrap, or using multiple drives</p> Signup and view all the answers

    Which type of motor is commonly used for belt conveyors?

    <p>Squirrel cage induction motor</p> Signup and view all the answers

    What is the purpose of bend and snubbing pulleys?

    <p>To reverse the belt to avoid contact with dirty side</p> Signup and view all the answers

    What should the loading system provide to avoid spillage or dust generation?

    <p>Steady flow and uniform distribution</p> Signup and view all the answers

    What are the common drive types for belt conveyors?

    <p>Plain, snubbed, tandem, and dual drives</p> Signup and view all the answers

    What type of motor is used for constant speed and severe starting conditions?

    <p>Compound DC motor</p> Signup and view all the answers

    What do chutes do in a belt conveyor system?

    <p>Direct product flow onto the belt and minimize spillage</p> Signup and view all the answers

    What offers flexibility in motor selection for belt conveyors?

    <p>Speed control devices such as fluid couplings and eddy-current couplings</p> Signup and view all the answers

    Where should the conveyor drive be when operating downhill?

    <p>At the tail end</p> Signup and view all the answers

    What factors should be considered when selecting driving motor and power transmission?

    <p>Speed requirements, electrical power supply type, environmental conditions, and starting characteristics</p> Signup and view all the answers

    How is loading of bulk material onto a belt conveyor usually done?

    <p>From a hopper by direct gravity discharge or from a preceding conveyor or feeder</p> Signup and view all the answers

    What are the components of belt conveyors mentioned in the text?

    <p>The components of belt conveyors mentioned in the text are: belt construction, idlers, drive arrangements, the power unit, loading and discharge arrangements, and belt cleaners.</p> Signup and view all the answers

    Where does the transported material get loaded in a basic belt conveyor?

    <p>The transported material is loaded at the tail end or feed end of a basic belt conveyor.</p> Signup and view all the answers

    What does the drive arrangement in a belt conveyor primarily consist of?

    <p>The drive arrangement in a belt conveyor primarily consists of the motor and reducer.</p> Signup and view all the answers

    What is the purpose of the drive arrangement in a belt conveyor?

    <p>The purpose of the drive arrangement in a belt conveyor is to supply the torque (rotating force) to create the necessary motion for the pulley to move the conveyor belt.</p> Signup and view all the answers

    What are the two types of belt-cleaning devices mentioned in the text?

    <p>Rotary brushes or scraper blades of steel or rubber</p> Signup and view all the answers

    What is the formula for calculating the conveying rate (C) of bulk materials on a belt conveyor?

    <p>$C = a \times \rho \times v$</p> Signup and view all the answers

    What is the bulk density of a material and how does it affect the conveying rate?

    <p>The bulk density is the mass of the material divided by its total volume. It affects the conveying rate as higher bulk density leads to a higher conveying rate.</p> Signup and view all the answers

    What is the surcharge angle and how does it influence the height of material piled on a conveyor belt?

    <p>The surcharge angle is the angle to the horizontal which the surface of the material assumes while at rest on a moving conveyor belt. It influences the height of material piled on a conveyor belt by affecting the movement of the belt and the heap of material.</p> Signup and view all the answers

    What are some properties of the conveyed product that should be considered?

    <p>Moisture content, dustiness, cohesiveness and adhesiveness, abrasiveness, chemical corrosiveness, and lump size</p> Signup and view all the answers

    What is the usual practice for allowing maximum lump size on a belt conveyor?

    <p>One-fifth (1/5) of the belt width for surcharge angles of 20° and one-tenth (1/10) of the belt width for surcharge angles up to 30°</p> Signup and view all the answers

    What are the learning outcomes mentioned at the end of the lectures?

    <p>Drive arrangements, the power unit, loading and discharge arrangements, belt cleaners, and the bulk solid to be transported</p> Signup and view all the answers

    Where should the conveyor drive be when operating downhill?

    <p>At the tail end</p> Signup and view all the answers

    What factors affect conveyor drive efficiency?

    <p>Tension difference, friction, and angle of wrap</p> Signup and view all the answers

    How can increasing power transmission be achieved?

    <p>By increasing friction coefficient, angle of wrap, or using multiple drives</p> Signup and view all the answers

    What are the common drive types for belt conveyors?

    <p>Plain, snubbed, tandem, and dual drives</p> Signup and view all the answers

    What are bend and snubbing pulleys used for?

    <p>To reverse the belt to avoid contact with dirty side</p> Signup and view all the answers

    What factors should be considered when selecting driving motor and power transmission?

    <p>Speed requirements, electrical power supply type, environmental conditions, and starting characteristics</p> Signup and view all the answers

    Which type of motor is commonly used for belt conveyors?

    <p>Squirrel cage induction motor</p> Signup and view all the answers

    What type of motor is used for constant speed and severe starting conditions?

    <p>Compound DC motor</p> Signup and view all the answers

    What speed control devices offer flexibility in motor selection?

    <p>Fluid couplings and eddy-current couplings</p> Signup and view all the answers

    How is bulk material usually loaded onto a belt conveyor?

    <p>From a hopper by direct gravity discharge or from a preceding conveyor or feeder</p> Signup and view all the answers

    What should the loading system provide to avoid spillage or dust generation?

    <p>Steady flow and uniform distribution</p> Signup and view all the answers

    What are chutes used for in a belt conveyor system?

    <p>To direct product flow onto the belt and minimize spillage, with skirt plates to confine the product and minimize abrasion</p> Signup and view all the answers

    Study Notes

    Conveyor Drive Arrangements and Power Units

    • Conveyor drive should be at the tail end when operating downhill
    • Factors affecting conveyor drive efficiency include tension difference, friction, and angle of wrap
    • Increasing power transmission can be done by increasing friction coefficient, angle of wrap, or using multiple drives
    • Common drive types include plain, snubbed, tandem, and dual drives
    • Bend and snubbing pulleys can reverse the belt to avoid contact with dirty side
    • Factors to consider when selecting driving motor and power transmission include speed requirements, electrical power supply type, environmental conditions, and starting characteristics
    • Squirrel cage induction motor is commonly used for belt conveyors
    • Compound DC motor is used for constant speed and severe starting conditions
    • Speed control devices such as fluid couplings and eddy-current couplings offer flexibility in motor selection
    • Loading of bulk material onto a belt conveyor is usually from a hopper by direct gravity discharge or from a preceding conveyor or feeder
    • Loading system should provide steady flow and uniform distribution to avoid spillage or dust generation
    • Chutes are used to direct product flow onto the belt and minimize spillage, with skirt plates to confine the product and minimize abrasion

    Conveyor Drive Arrangements and Power Units

    • Conveyor drive should be at the tail end when operating downhill
    • Factors affecting conveyor drive efficiency include tension difference, friction, and angle of wrap
    • Increasing power transmission can be done by increasing friction coefficient, angle of wrap, or using multiple drives
    • Common drive types include plain, snubbed, tandem, and dual drives
    • Bend and snubbing pulleys can reverse the belt to avoid contact with dirty side
    • Factors to consider when selecting driving motor and power transmission include speed requirements, electrical power supply type, environmental conditions, and starting characteristics
    • Squirrel cage induction motor is commonly used for belt conveyors
    • Compound DC motor is used for constant speed and severe starting conditions
    • Speed control devices such as fluid couplings and eddy-current couplings offer flexibility in motor selection
    • Loading of bulk material onto a belt conveyor is usually from a hopper by direct gravity discharge or from a preceding conveyor or feeder
    • Loading system should provide steady flow and uniform distribution to avoid spillage or dust generation
    • Chutes are used to direct product flow onto the belt and minimize spillage, with skirt plates to confine the product and minimize abrasion

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    Description

    Test your knowledge of conveyor drive arrangements and power units with this quiz. Explore factors affecting drive efficiency, common drive types, motor selection, loading systems, and more.

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