Q.1
The torsion test cannot determine __________
  • a) modulus of elasticity in shear
  • b) torsional yield strength
  • c) modulus of rupture
  • d) tensile strength
Q.2
The deformation of the specimen is measured by a twist-measurement device called the troptometer.
  • a) True
  • b) False
Q.3
In the following torsional test sample, the highest shear stress will be at point ________
Questionmechanical-metallurgy-questions-answers3.jpg
  • a) A
  • b) B
  • c) C
  • d) D
Q.4
The maximum shear stress for a solid cylindrical bar having diameter D, and torsional moment equal to M will be _______
  • a) 16M/πD3
  • b) 16M/πD4
  • c) 8M/πD
  • d) MD
Q.5
In the torsion test, the obtained data are with respect to _____________________
  • a) stress vs. strain
  • b) shear stress vs. strain
  • c) shear stress vs. Shear strain
  • d) twisting moment vs. Angle of twist
Q.6
For calculating the modulus of rupture from the thin-walled hollow cylinder, the diameter to wall thickness ratio should be in the order of __________
  • a) 10-20
  • b) 50-100
  • c) 1-2
  • d) 1000-1500
Q.7
The brittle fracture in the torsion test results in ________ geometry.
  • a) flat facet
  • b) helical shape
  • c) cup and cone
  • d) shear fracture
Q.8
A torsion test provides a more fundamental study of the plasticity of the metal than the tension test.
  • a) True
  • b) False
Q.9
Which of the following statement is not correct with respect to the torsion test?
  • a) σ1 = -σ3; σ2 = 0
  • b) τmax = 2σ1/2 = σmax
  • c) ϵmax = ϵ1; ϵ2=ϵ3 = -ϵ1/2
  • d) ϒ max = ϵ1-ϵ3 = 2ϵ1
Q.10
Which of the following statement is correct?
  • a) Torsion test plastic deformation starts much before compared to tension test
  • b) tension test failure of material occurs much faster than the torsion test
  • c) The shear stress value in the torsion test is higher than the tension test
  • d) The total amount of plastic deformation possible is much higher in tension test than torsion test
Q.11
The typical test temperature in the hot torsion testing is _________
  • a) just above room temperature
  • b) below room temperature
  • c) above 0.6 Tm; where Tm is melting point
  • d) just below the melting point
Q.12
Match the correct order of the temperature from the following diagram?
Questionmechanical-metallurgy-questions-answers12.jpg
  • a) T1>T2>T3
  • b) T1
  • c) T2>T1>T3
  • d) T3>T1>T2
0 h : 0 m : 1 s