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WorksheetsCEMDEF40 Quiz 02
Total questions: 25
Worksheet time: 24mins
Determine of the outside diameter of hallow steel tube that will carry a tensile load of 500 kN at a stress of 140 MPa. Assume the wall thickness to be one-tenth of the outside diameter.
123 mm
113 mm
103 mm
93 mm
ME Board Exam April 1998:
A force of 10 N is applied to one end of a 10 in. diameter circular rod. Calculate stress.
0.20 kPa
0.05 kPa
0.10 kPa
0.15 kPa
What force is required to punch a 20-mm diameter hole through a 10-mm thick plate. The ultimate strength of the plate material is 450 MPa.
241 kN
283 kN
386 kN
252 kN
The compression test is carried on __________ materials.
ductile
brittle
malleable
plastic
When a material is loaded within elastic limit, the material will regain its shape and size when the load is removed.
Agree
Disagree
When a body is subjected to a direct tensile stress (σ) in one plane, then maximum normal stress occurs at a section inclined at __________ to the normal of the section.
0°
30°
45°
90°
A rectangular beam subjected to a bending moment is shown in the figure. The upper layer of the beam will be in tension.
True
False
The ratio of stress and strain is known as (a) .
Two parallel, equal and opposite forces acting tangentially to the surface of the body is called as
Complementary stress
Compressive stress
Shear stress
Tensile stress
A test specimen is stressed slightly beyond the yield point and then unloaded.
Its yield strength will...
Decrease
Remains same
Increase
Becomes equal to the ultimate tensile strength.
If the area of cross-section of a wire is circular and if the radius of this circle
decreases to half its original value due to the stretch of the wire by a load, then
the modulus of elasticity of the wire be:
One-fourth of its original value
Halved
Doubled
Unaffected
Which one of the following is correct?
When a nut is tightened by placing a washer below it, the bolt will be subjected
to _.
Compression only
Shear only
Tension
Compression and shear
Which of the following stresses are associated with the tightening of the nut on a
bolt?
1. Tensile stress due to the stretching of the bolt.
2. Bending stress due to the bending of the bolt.
3. Crushing and shear stresses in threads.
4. Torsional shear stress due to frictional resistance between the nut and
the bolt.
1, 2 and 4
1, 2 and 3
2, 3 and 4
1, 3 and 4
1, 2, 3 and 4
During tensile-testing of a specimen using a Universal Testing Machine, the
parameters actually measured include:
True stress and true strain
Engineering stress and engineering strain
Poisson’s ratio and Young's modulus
Load and elongation
In a tensile test, near the elastic limit zone
Tensile stress increases at a faster rate
Tensile stress decreases at a faster rate
Tensile stress increases in linear proportion to the stress
Tensile stress decreases in linear proportion to the stress
Which one of the following properties is more sensitive to increase in strain rate?
Yield strength
Proportional limit
Elastic limit
Tensile strength
Select the proper sequence:
1. Proportional Limit
2. Elastic limit
3. Yielding
4. Failure
2, 3, 1, 4
2, 1, 3, 4
1, 3, 2, 4
1, 2, 3, 4
A mild steel specimen is tested in tension up to fracture in a Universal Testing
Machine. Which of the following mechanical properties of the material can be
evaluated from such a test?
1. Modulus of elasticity
2. Yield stress
3. Ductility
4. Tensile strength
5. Modulus of rigidity
1, 3, 5 and 6
2, 3, 4 and 6
1, 2, 5 and 6
1, 2, 3 and 4
In a simple tension test, Hooke's law is valid up to the...
Elastic limit
Limit of proportionality
Ultimate stress
Breaking point
Give one effect of force on the material.
(a)
The material is said to be _ if the cross-section is the same at any location across the long axis of the beam.
(a)
The material is said to be _ if its properties remain the same when tested in different directions.
(a)
The material is said to be _ if it has a uniform composition throughout that cannot be mechanically separated into different materials.
(a)
It is the
ratio of the change in length caused by the
applied force, to the original length.
(a)
It can be defined as the intensity of force on a certain area.
(a)
