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 ________
- 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?
- a) T1>T2>T3
-
b) T1
- c) T2>T1>T3
- d) T3>T1>T2