BME Machine Design 2

Question 1

Which gear type is used to transmit motion between two parallel shafts?

Accepted Answer

Helical gear

Answer

Bevel gear

Answer

Worm gear

Answer

Hypoid gear

Question 2

The Hertz contact stress formula is used to analyze failure in:

Accepted Answer

Rolling element bearings

Answer

Welds

Answer

Bolted joints

Answer

Keyways

Question 3

Which spring stores energy through torsion of its wire?

Accepted Answer

Helical compression spring

Answer

Leaf spring

Answer

Disc spring

Answer

Flat spiral spring

Question 4

Goodman's criterion in fatigue design relates:

Accepted Answer

Mean stress and alternating stress to failure

Answer

Yield strength and ultimate strength only

Answer

Temperature and stress

Answer

Strain and displacement

Question 5

What is the function of a retaining ring (snap ring) in a shaft assembly?

Accepted Answer

Prevent axial movement of a component

Answer

Transmit torque

Answer

Seal lubricant

Answer

Absorb vibration

Question 6

Stress concentration in a machine member is most influenced by:

Accepted Answer

Geometric discontinuities such as holes and notches

Answer

Material density

Answer

Surface color

Answer

Component length