Belt Drives 1

Which of these belts are well suited for timing mechanisms?

• Flat belt

• V-belt

• Synchronous belt

• Multiple V-Belt

• All types can be used

What makes the pitch diameter of a sheave change?

• The belt used

• The distance between the shaft centers

• The speed of the driving shaft

• The belt tension

• The speed ratio between the driving and driven sheaves

What is the drive misalignment called that results when the sheaves are at a different angle with the vertical plane?

• Parallel misalignment

• Horizontal angular misalignment

• Vertical angular misalignment

• Planar misalignment

• Vertical parallel misalignment

Which tool is used to check for sheave parallel alignment?

• Straightedge

• Combination square

• Tape rule

• Feeler gauge

• No tool is needed, the eye is precise enough

Which parameters are represented by the two scales on a belt tension tester?

• Deflection distance and belt span

• Deflection force and belt type

• Deflection force and belt width

• Deflection distance and small sheave diameter

• Deflection force and belt span

If the driving sheave of a belt has an outside diameter of 6 inches and the driven sheave has an outside diameter of 3 inches, the driven sheave rotates

• two times faster than the driving sheave

• half as fast as the driving sheave

• slower than the driving sheave

• at the same speed as the driving sheave

• impossible to tell from the given data

What is a photo-reflective tachometer used for?

• Measures the torque on a sheave.

• Measures the speed of a sheave.

• Takes a picture of a sheave as it rotates.

• Measures the wear on a belt.

• Examines the surface of a sheave.

Which type of belt is used with sprockets?

• F.H.P V-belt

• Timing belt

• Flat belts used on conveyors

• Multiple V-belts

• None

Power is transferred between an electric motor and a pump with a belt drive. Calculate the required driven sheave pitch diameter and belt length if the motor and pump shafts are 20 inches apart and the pump shaft must rotate at 1800 r/minute. The driving sheave is installed directly on the motor shaft and has a pitch diameter of 5 inches. The plate on the motor indicates a nominal speed of 1000 r/minute.

• Driven sheave pitch diameter is 2.8 inches and belt length is 52.2 inches.

• Driven sheave pitch diameter is 9 inches and belt length is 52.2 inches.

• Driven sheave pitch diameter is 9 inches and belt length is 62 inches.

• Driven sheave pitch diameter is 2.8 inches and belt length is 62 inches.

• Impossible to tell from the given data

What should be used to clean belts?

• A solvent

• Soap and water

• A glycerine/spirit mixture

• Sandpaper

• They should never be cleaned