Shear strength of the welded joint for double parallel fillet is (where τ = Allowable shear stress for weld metal)
Select an option to see the answer and solution.
The tensile strength of the welded joint for double fillet is (where s = Leg or size of the weld, l = Length of weld and σ t = Allowable tensile stress for weld metal)
A. 0.5 s l σ t
B. s l σ t
C. D. 2 s l σ t
Select an option to see the answer and solution.
A thin cylindrical shell of diameter (d), length (l ) and thickness (t) is subjected to an internal pressure (p). The hoop stress in the shell is
A. t pd
B. 2 t pd
C. 4 t pd
D. 6 t pd
Select an option to see the answer and solution.
A thin cylindrical shell of diameter (d) length (l ) and thickness (t) is subjected to an internal pressure (p). The longitudinal stress in the shell is
A. t pd
B. 2 t pd
C. 4 t pd
D. 6 t pd
Select an option to see the answer and solution.
Shear modulus is the ratio of
A. Linear stress to linear strain
B. Linear stress to lateral strain
C. Volumetric strain to linear strain
D. Shear stress to shear strain
Select an option to see the answer and solution.
Modular ratio of the two materials is the ratio of
A. Linear stress to linear strain
B. Shear stress to shear strain
C. Their modulus of elasticities
D. Their modulus of rigidities
Select an option to see the answer and solution.
Modular ratio of two materials is the ratio of
A. Strains
B. Stress and strain
C. Shear stress and shear strain
D. Moduli and elasticity
Select an option to see the answer and solution.
If the radius of wire stretched by a load is doubled, then its Young’s modulus will be
A. Doubled
B. Halved
C. Becomes four times
D. None of the above
Select an option to see the answer and solution.
For which material the Poisson's ratio is more than unity
A. Steel
B. Copper
C. Aluminium
D. None of the above
Select an option to see the answer and solution.
The value of modulus of elasticity for mild steel is of the order of
A. 2.1 × 105 kg/cm2
B. 2.1 × 106 kg/cm2
C. 2.1 × 107 kg/cm2
D. 0.1 × 106 kg/cm2
Select an option to see the answer and solution.
True stress strain-curve for materials is plotted between
A. Load/original cross-sectional area and change in length/original length
B. Load/ instantaneous cross-sectional area and loge (original area/ instantaneous area)
C. Load/ instantaneous cross-sectional area and change in length/ original length
D. Load/ instantaneous area and instantaneous area/original area
Select an option to see the answer and solution.
When the shear force diagram is a parabolic curve between two points, it indicates that there is a
A. Point load at the two points
B. No loading between the two points
C. Uniformly distributed load between the two points
D. Uniformly varying load between the two points
Select an option to see the answer and solution.
When there is a sudden increase or decrease in shear force diagram between any two points, it indicates that there is a
A. Point load at the two points
B. No loading between the two points
C. Uniformly distributed load between the two points
D. Uniformly varying load between the two points
Select an option to see the answer and solution.
A bolt is made to pass through a tube and both of them are tightly fitted with the help of washers and nuts. If the nut is tightened, then
A. Bolt and tube are under tension
B. Bolt and tube are under compression
C. Bolt is under compression and tube is under tension
D. Bolt is under tension and tube is under compression
Select an option to see the answer and solution.
The property of a material which allows it to be drawn into a smaller section is called
A. Plasticity
B. Ductility
C. Elasticity
D. Malleability
Select an option to see the answer and solution.
The ratio of maximum shear stress developed in a rectangular beam and a circular beam of the same cross-sectional area is
Select an option to see the answer and solution.
The pull required to tear off the plate per pitch length is (where p = Pitch of rivets, t = Thickness of plates and σ t , τ and σ c = Permissible tensile, shearing and crushing stresses respectively)
A. ( p − 2 d ) t × σ c
B. ( p − d ) t × τ
C. ( p − d ) t × σ t
D. ( 2 p − d ) t × σ t
Select an option to see the answer and solution.
The torsional rigidity of a shaft is given by
Select an option to see the answer and solution.
When a shaft, is subjected to torsion, the shear stress induced in the shaft varies from
A. Minimum at the center to maximum at the circumference
B. Maximum at the center to minimum at the circumference
C. Zero at the center to maximum at the circumference
D. Maximum at the center to zero at the circumference
Select an option to see the answer and solution.
A thin spherical shell of diameter (d) and thickness (t) is subjected to an internal pressure (p). The stress in the shell material is
A. t pd
B. 2 t pd
C. 4 t pd
D. 8 t pd
Select an option to see the answer and solution.