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Mechanical Metallurgy
Advanced Mechanical Metallurgy
Quiz 1
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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
0 h : 0 m : 1 s
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