MCQ on Mechanical Engineering Design

Which of the following joins two rotating shafts to each other?

• Key

• Coupling

• Gear

• Belt drive

Which of the following expression is not correct for designing a shaft according to rigidity?

• T = GθJ / L

• J = TL / Gθ

• θ = TL / GJ

• L = GθT / J

Which of the following is not the function of a spring?

• They are used for the measurement of force and to control motion

• They are used to absorb shocks and vibrations

• They are used to store energy

• They are used to measure displacement

Determine the number of coils in a helical compression spring, if the modulus of rigidity is 80 Gpa and spring stiffness is 50 N/ mm. Assume wire diameter and spring index as 8 mm and 5 respectively

• 11.8 turns

• 12.8 turns

• 13.3 turns

• None of the above

 Solid length for helical compression springs having square and ground ends is given as _________.

• (n + 2)d

• (n + 3)d

• (n + 1)d

• None of the above

Which of the following can be used for power transmission in intersecting shafts.

• Spur Gear
  

• Helical Gear
  

• Bevel Gear
  

• None of the listed

The greater the velocity ratio, the smaller the gearbox.

• True

• Greater the gearbox

• Size of gearbox remains unaffected

• None of the listed

Lewis equation in spur gears is applied _________.

• only to the pinion

• only to the gear

• to stronger of the pinion or gear

• to weaker of the pinion or gear

From the following, which type of gears can not be used for parallel shafts?

• Spur

• Helical

• Herringbone

• Worm and worm wheel

The anti-friction bearings

• have low starting and low running friction at moderate speeds

• have a high initial cost

• can carry both radial and thrust loads

• all the mentioned