Design of Transmission systems - Unit - I - MCQ

The material suitable for the belts used in agricultural equipments is

• cotton
• rubber
• leather
• balata gum

The power transmitted by means of a belt depends upon

• velocity of the belt
• tension under which the belt is placed on the pulleys
• tension under which the belt is placed on the pulleys
• all of the above

When the speed of belt increases

• the coefficient of friction between the belt and pulley increases
• the coefficient of friction between the belt and pulley decreases
• the power transmitted will decrease
• the power transmitted will increase

The tension in the slack side of the belt is ............ the tension in the tight side of the belt

• equal to
• less than
• greater than

When a belt drive is transmitting maximum power,

• effective tension is equal to the centrifugal tension
• effective tension is half of the centrifugal tension
• driving tension in slack side is equal to the centrifugal tension
• driving tension in tight side is twice the centrifugal tension

All stresses produced in a belt are

• compressive stresses
• tensile stresses
• both tensile and compressive stresses
• shear stresses

The included angle for the V-belt is usually

• 20° – 30°
• 30° – 40°
• 40° – 60°
• 60° – 80°

The V-belts are particularly suitable for .............. drives.

• short
• long

The groove angle of the pulley for V-belt drive is usually

• 20° – 25°
• 25° – 32°
• 32° – 38°
• 38° – 45°

A V-belt designated by A-914-50 denotes

• a standard belt
• an oversize belt
• an undersize belt
• none of these