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WorksheetsCE 8301 Strength of Materials I
Total questions: 45
Worksheet time: 3600secs
The ratio of stress and strain is known as
Modulus of elasticity
Young's modulus
Both a. and b.
None of the above
The actual breaking stress in stress-strain diagram is the ratio of
load at breaking point and original cross-sectional area
load at breaking point and reduced cross-sectional area
maximum load and original cross-sectional area
yield load and original cross-sectional area
A rigid body has Poisson's ratio equal to
0
1
less than 1
greater than one
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 tensile test was conducted on a mild steel bar. The diameter and the gauge length of bat was 3 cm and 20 cm respectively. The extension was 0.21mm. What is the value to strain?
0.0010
0.00105
0.0105
0.005
A composite bar having two sections of cross-sectional area 100mm2 and 200mm2 respectively. The length of both the sections is 100mm. What will be the total elongation of bar if it is subjected to axial force of 100kN and E = 105 N/mm2?
1.0
1.25
1.5
2.0
What will be the modulus of rigidity if the value of modulus of elasticity is 200 and Poissons ratio is 0.25?
70
80
125
250
What is the expression for modulus of rigidity in terms of modulus of elasticity and the Poissons ratio?
G = 3E / 2(1 + μ)
G = 5E / (1 + μ)
G = E / 2(1 + μ)
G = E/ (1 + 2μ)
What is the factor of safety?
The ratio of stress to strain
The ratio of permissible stress to the ultimate stress
The ratio of ultimate stress to the permissible stress
The ratio of longitudinal strain to stress
A beam supported on more than two supports is called
simply supported beam
fixed beam
overhanging beam
continuous beam
What is the S.I. unit of sectional modulus?
mm4
mm3
mm2
m
The beam having one end free and one end fixed is called as
Cantilever beam
Continuous beam
Overhang beam
Simply supported beam
At the point of contraflexure, the value of bending moment is ____________
Zero
Maximum
Can’t be determined
Minimum
What is the other name for a positive bending moment?
Hogging
Sagging
Inflation
Contraflexure
Slope in the beam at any point is measured in ____________
Degrees
Minutes
Radians
Metric tonnes
In a cantilever of span “L” subjected to a concentrated load of “W” at a distance of L/3 from free end. The deflection is ________
WL^3/3EI
14WL^3/81EI
WL^3/81EI
8WL^3/81EI
Calculate the slope in a simply supported beam subjected to point load at centre. Take the EI into consideration.
Wl^3/4EI
Wl^2/16EI
Wl^3/8EI
Wl^4/6EI
________ of a beam is a measure of its resistance against deflection.
Strength
Stiffness
Slope
Maximum bending
A beam 6 metres long is fixed at it ends. It carries a udl of 5 kN/m. Find the maximum bending moment in the beam.
15 kNm
20 kNm
35 kNm
40 kNm
In simply supported beams, the slope is _____________ at supports.
Minimum
Zero
Maximum
Uniform
Calculate the maximum deflection of a simply supported beam if the maximum slope at A is 0.0075radians and the distance of centre of gravity of bending moment diagram to support A is 1.33 metres.
9.975 mm
9.5 mm
9.25 mm
9.785 mm
In cantilever beams, the deflection is zero at___________
Free and
Fixed end
At supports
Through out
Calculate the torque which a shaft of 300 mm diameter can safely transmit, if the shear stress is 48 N / mm2.
356 kNm
254 kNm
332 kNm
564 kNm
A circular shaft of diameter 30 mm is tested under torsion the gauge length of test specimen is 300 mm. A torque of 2kNm produces an angle twist of 1°. Calculate CJ.
0.432 × 106 N/mm2
0.324 × 106 N/mm2
0.46 × 106 N/mm2
0.532 × 106 N/mm2
The angle of twist can be written as ________
TL/J
CJ/TL
TL/CJ
T/J
The power transmitted by shaft SI system is given by __________
2πNT/60
3πNT/60
2πNT/45
NT/60 W
Calculate the power transmitted in the shaft at 150 rpm. Take torque as 9000Nm.
140 kW
150 kW
160 kW
175 kW
Find total number coils in a spring having square and ground ends. Deflection in the spring is 6mm when load of 1100N is applied. Modulus of rigidity is 81370N/mm². Wire diameter and pitch circle diameter are 10mm and 50mm respectively.
7
6
5
4
Given the truss diagram, what is the magnitude of the reaction force at Joint A?
RA = 250 N
RA = 500 N
RA = 60 N
RA = 1000 N
Method of sections is use for which type of trusses?
complex
compound
simple
simple and compound
117.1 N
97.6 N
75.0 N
48.0 N
Given the truss diagram, what is the magnitude of the reaction force at Joint A?
RA = 143.33 N
RA = 196.67 N
RA = 150 N
RA = 70 N
Which of these accurately represents the free body diagram for joint A?
A frame which is composed of members just sufficient to keep it in equilibrium, such frame is ___________
Redundant frame
Perfect frame
Imperfect frame
Deficient frame
The tension coefficient of any member is
tension in the joints
tension divided by the length
tension per unit area
tension in the member
In method of sections, what is the maximum no. of unknown members through which the imaginary section can pass?
1
2
3
4
