Mechanical system-Belt and chain

What is the primary function of belts in belt drives?

• To increase friction

• To connect shafts that are a considerable distance apart

• To reduce the speed of machines

• To lubricate the pulleys

Which type of belt is commonly used for many power transmission systems?

• Flat belt

• V-section belt

• Toothed belt

• Synchronous belt

What is the main advantage of using a ribbed V-belt?

• It reduces the noise of the machine

• It increases the speed of the belt

• It combines the grip of a V-belt with the flexibility of a flat belt

• It makes the belt waterproof

What is the limiting factor on the power that toothed or synchronous belts can transmit?

• The flexibility of the belt

• The width of the belt

• The maximum allowable stress in the belt material

• The length of the belt

Why are flat belts mainly used for transmitting light loads?

• Because they are inexpensive

• Because they are less durable

• Because they are flexible and can handle misalignment between shafts

• Because they are easier to install

What is the recommended speed limit for synchronous and HRD belts?

• 60 m/s

• 50 m/s

• 70 m/s

• 40 m/s

What can over tensioning a belt lead to?

• Excessive load on the bearings

• Increased belt efficiency

• Decreased power transmission

• Longer belt life

Which type of belt is known for altering valve timing and possibly causing damage to the pistons?

• The HTD belt

• The V-belt

• The synchronous belt

• The flat belt

What is the grip advantage of a V-belt compared to a flat belt made from the same materials?

• Three times the grip

• Twice the grip

• Equal grip

• Half the grip

What is the primary purpose of chain drives in machinery?

• To reduce the power between parallel shafts

• To increase friction between components

• To transmit power between parallel shafts

• To cool down the machinery