FREE Master of Engineering Machine Design Questions and Answers

Question 1

Which of the following, when applied to power screws, is the right formula to calculate torque when the load is reduced during machine design? (W=weight in N, =angle of inclination, =angle of friction)

Accepted Answer

W tan (θ – ϕ)

Answer

W tan (θ + ϕ)

Answer

W tan (θ x ϕ)

Answer

W tan (θ / ϕ)

Question 2

Which of the following represents a screw in dominance?

Accepted Answer

Large load carrying capacity

Answer

Mechanical advantage is lowered

Answer

High efficiency

Answer

Wear of screw is reduced

Question 3

According to ASME code, what is the maximum shear stress for a material with keyway effect and ultimate tensile strength (Sut)?

Accepted Answer

0.135 Sut

Answer

0.225 Sut

Answer

0.18 Sut

Answer

0.30 Sut

Question 4

Which of the following components only experiences the bending moment when transferring torque?

Accepted Answer

Axle

Answer

Belt drive

Answer

Clutch

Answer

Brake

Question 5

Which one of the following connects two rotating shafts?

Accepted Answer

Coupling

Answer

Belt drive

Answer

Key

Answer

Gear

Question 6

Which of the ensuing lines is the most cost-effective?

Accepted Answer

Soderberg line

Answer

Lagrange line

Answer

Gerber parabola

Answer

Goodman line

Question 7

Which of the following expressions is incorrect for rigidity-based shaft design?

Accepted Answer

L = GθT / J

Answer

T = GθJ / L

Answer

J = TL / Gθ

Answer

θ = TL / GJ

Question 8

What sort of welding in machine design use an oxygen-acetylene gas?

Accepted Answer

Gas welding

Answer

Forge welding

Answer

Thermit welding

Answer

Electric arc welding

Question 9

Which of the subsequent is not a transmission shaft type?

Accepted Answer

Transmission shaft

Answer

Line shaft

Answer

Countershaft

Answer

Crankshaft

Question 10

Which of the following is false regarding stiff and flexible connections in machine design?

Accepted Answer

Rigid couplings are expensive than flexible couplings

Answer

Rigid couplings cannot tolerate slight misalignment between axes of shafts

Answer

Flexible couplings can absorb shocks and vibrations

Answer

Flexible couplings can tolerate any slight misalignment between axes of shafts