Which is most predominant type of failure in a thin shell? a. Bearing failure b. Compression failure c. Crushing failure d. None

Which is most predominant type of failure in a thin shell?
a. Bearing failure
b. Compression failure
c. Crushing failure
d. None
by

1 Answer

Answer :

d. None
by

Related questions

A thin cylindrical shell under internal pressure can fail by a. Shear b. Compression c. Tension d. None

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When a thin cylindrical shell is subjected to an internal pressure, there will be a) a decrease in diameter and length of the shell b) an increase in diameter and length of the shell c) an increase in diameter and decrease in length of the shell d) a decrease in diameter and increase in length of the shell

Description : When a thin cylindrical shell is subjected to an internal pressure, there will be a) a decrease in diameter and length of the shell b) an increase in diameter and length of the shell c) an ... and decrease in length of the shell d) a decrease in diameter and increase in length of the shell

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In a thin shell which stress is negligible a) σh b) σl c) σr d) None

Description : In a thin shell which stress is negligible a) σh b) σl c) σr d) None

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Value of σr in a thin shell is a) pD/2t b) pD/4t c) pD/3t d) None

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Longitudinal strain in a thin shell is a) σh /E b) σl /E c) σr /E d) None

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Hoop strain in a thin shell is a) σh /E b) σl /E c) 3 σh /E d) None

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Which one is most important in a thin shell? a) d/t <20 b) d/t> 10 c) Stresses are uniform d) None

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Design of a thin shell under pressure is done on the basis of a. Radial stress b. Longitudinal stress c. Hoop stress d. All the three stresses

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Stresses in a thin cylindrical shell under internal pressure is independent of a. Diameter b. Thickness c. Length d. Diameter and thickness

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A thin spherical shell under internal pressure will fail under a. Maximum shear stress b. Principal compressive stress c. Principal tensile stress d. None

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Radial stress in a thin shell is given by a. pD/2t b. pD/4t c. pD/3t d. None

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Among the cylindrical and spherical thin vessels of same material, diameter and pressure which has the lesser thickness a. Cylindrical shell b. Spherical shell c. Cylindrical shell with semi spherical heads d. None

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Which stress is the least in a thin shell a. Longitudinal stress b. Hoop stress c. Radial stress d. None

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When a close-coiled helical spring is subjected to an axial load, it is said to be under. (a) Bending (b) Shear (c) Torsion (d) Crushing

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Strength of a rivet is a. Strength in shear b. Strength in crushing c. Strength in tension d. None

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For long columns, the value of buckling load is……………..crushing load. (a) Less than (b) More than (c) Equal to (d) None of these

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Which type of springs have only active coils? a. Helical compression springs b. Helical tension springs c. Both a. and b. d. None of the above

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In a thick cylindrical shell subjected to an internal pressure (p), the radial stress across the thickness of a cylinder is a) maximum at the outer surface and minimum at the inner surface b) maximum at the inner surface and minimum at the outer surface c) maximum at the inner surface and zero at the outer surface d) maximum at the outer surface and zero at the inner surface

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The thick shell is made from laminations to get (a) Increased stresses (b) Decreased stresses (c) Uniform stresses (d) None

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Which stress is constant in a thick shell a) σh b) σl c) σr d) None

Description : Which stress is constant in a thick shell a) σh b) σl c) σr d) None

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Maximum shear stress in a thick shell is a) (σh+ σl)/2 b) (σh+ σr)/2 c) (σh– σl)/2 d) None

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In a thick shell which stress is negligible a) σh b) σl c) σr d) None

Description : In a thick shell which stress is negligible a) σh b) σl c) σr d) None

Last Answer : b) σl

What is the ratio of hoop stresses in a spherical vs cylindrical shell of same diameter, thickness and under same pressure? a. 4:1 b. 2:1 c. 1:2 d. 1:4

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Lame's theory is associated with a) thick cylindrical shells b) thin cylindrical shells c) direct and bending stresses d) none of these

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A spherical pressure vessel is made of thin magnesium plate 0.25 cm thick. The main diameter of the sphere is 600 cm and allowable stress in tension is 900 kg/cm2. The safe internal gas pressure for the vessel would be a) 0.5 kg/cm2 b) 1.5 kg/cm2 c) 4.5 kg/cm2 d) 5.7 kg/cm2

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Cylinder having inner diameter to wall thickness ratio less than 15 are a) Thin cylinders b) Thick Cylinders c) Moderate cylinders d) none of the above

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A thin cylindrical under internal pressure can fail along the a. Longitudinal joint b. Circumferential joint c. Longitudinal as well as circumferential joint d. None

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Hoop stress in a thin vessel is a. pD/2t b. pD/4t c. pD/3t d. None

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Vessel is said to be thin if a. D/t =20 b. D/t=10 c. D/t >20 d. D/t >10

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A vessel is said to be thin if a. Its wall has less thickness b. Stresses are uniform over the entire thickness c. Stresses vary at inner and at outer radius d. None of the above

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The property of a material by which it can be beaten or rolled into thin sheets, is called (a) Elasticity (b) Plasticity (c) Ductility (d) Malleability

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Coil springs absorb shocks by (a) bending (b) twisting (c) compression (d) tension

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Leaf springs absorb shocks by (a) bending (b) twisting (c) compression (d) tension

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In a square and ground helical spring the effective number of turns is incresead by a. 1 b. 2 c. 1.5 d. 0 Ans: b 77. Frequency of the fluctuating load of helical compression spring should be a. lees than natural frequency of vibration b. twenty times the natural frequency of vibration c. slightly greater than the natural frequency d. twenty times less than the natural frequency of vibration

Description : In a square and ground helical spring the effective number of turns is incresead by a. 1 b. 2 c. 1.5 d. 0 Ans: b 77. Frequency of the fluctuating load of helical compression ... vibration c. slightly greater than the natural frequency d. twenty times less than the natural frequency of vibration

Last Answer : d. twenty times less than the natural frequency of vibration

A compression spring is made of music wire of 2 mm diameter having a shear strength and shear modulus of 800 Mpa and 80 Gpa respectively. The mean coil diameter is 20mm, free length is 40 mm, and the number of active coils is 10. If the mean coil diameter is reduced to 10 mm, the stiffness of the spring is approximately a. increased by 8 times b. decreased by 2 times c. increased by 2 times d. decreased by 8 times

Description : A compression spring is made of music wire of 2 mm diameter having a shear strength and shear modulus of 800 Mpa and 80 Gpa respectively. The mean coil diameter is 20mm, free length is 40 mm, and the number ... by 8 times b. decreased by 2 times c. increased by 2 times d. decreased by 8 times

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The spring constant of a helical compression spring does not depend on a. Coil diameter b. Material strength c. Number of active turns d. wire diameter

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Last Answer : b. Material strength

Coil springs absorb shocks by (A) bending (B) twisting (C) compression (D) tension

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Wahl’s stress concentration factor is used in close coiled springs under axial load to account for (a) Shear effect (b) Bending effect (c) Compression effect (d) none

Description : Wahl’s stress concentration factor is used in close coiled springs under axial load to account for (a) Shear effect (b) Bending effect (c) Compression effect (d) none

Last Answer : (b) Bending effect

A open helical spring under axial torque is designed on the basis of (a) Shear (b) Compression (c) Bending (d) None

Description : A open helical spring under axial torque is designed on the basis of (a) Shear (b) Compression (c) Bending (d) None

Last Answer : d) None

A closed helical spring under axial torque is designed on the basis of (a) Shear (b) Compression (c) Bending (d) None

Description : A closed helical spring under axial torque is designed on the basis of (a) Shear (b) Compression (c) Bending (d) None

Last Answer : (c) Bending

A closed helical spring under axial load is designed on the basis of (a) Shear (b) Compression (c) Bending (d) None

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Last Answer : (a) Shear

A carriage spring is designed on the basis of (a) Shear (b) Compression (c) Bending (d) None

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A close coiled helical spring is compressed. Its wire is subjected to A. Compression B. Tension C.Shear D. Torque

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Last Answer : B. Tension

Find the shear stress in the spring wire used to design a helical compression sprig if a load of 1200N is applied on the spring. Spring index is 6, and wire diameter 7mm. a) 452.2N/mm² b) 468.6N/mm² c) 512.2N/mm² d) None of the listed

Description : Find the shear stress in the spring wire used to design a helical compression sprig if a load of 1200N is applied on the spring. Spring index is 6, and wire diameter 7mm. a) 452.2N/mm² b) 468.6N/mm² c) 512.2N/mm² d) None of the listed

Last Answer : b) 468.6N/mm²

Determine number of coils in a helical compression spring, if modulus of rigidity is 80 Gpa and spring stiffness is 50 N/ mm. Assume wire diameter and spring index as 8 mm and 5 respectively a. 11.8 turns b. 12.8 turns c. 13.3 turns d. None of the above

Description : Determine number of coils in a helical compression spring, if modulus of rigidity is 80 Gpa and spring stiffness is 50 N/ mm. Assume wire diameter and spring index as 8 mm and 5 respectively a. 11.8 turns b. 12.8 turns c. 13.3 turns d. None of the above

Last Answer : b. 12.8 turns

Solid length for helical compression springs having square and ground ends is given as _________. a. (n + 2)d b. (n + 3)d c. (n + 1)d d. None of the above

Description : Solid length for helical compression springs having square and ground ends is given as _________. a. (n + 2)d b. (n + 3)d c. (n + 1)d d. None of the above

Last Answer : a. (n + 2)d

Free length for helical compression springs having square ends is given as ________. a.pn + 2d b.pn + 3d c. 2(p + d) d.pn + 4d

Description : Free length for helical compression springs having square ends is given as ________. a.pn + 2d b.pn + 3d c. 2(p + d) d.pn + 4d

Last Answer : b.pn + 3d

A short, hollow cast iron cylinder with a wall thickness of 1 cm is to carry a compressive load of 10 tonnes. If the working stress in compression is 800 kg/cm2, the outside diameter of the cylinder should not be less than a) 0.5cm b) 5 cm c) 2.5cm d) 4.5 cm

Description : A short, hollow cast iron cylinder with a wall thickness of 1 cm is to carry a compressive load of 10 tonnes. If the working stress in compression is 800 kg/cm2, the outside diameter of the cylinder should not be less than a) 0.5cm b) 5 cm c) 2.5cm d) 4.5 cm

Last Answer : b) 5 cm

Compression members always tend to buckle in the direction of (a) Vertical axis (b) Horizontal axis (c) Minimum cross-section (d) Least radius of gyration

Description : Compression members always tend to buckle in the direction of (a) Vertical axis (b) Horizontal axis (c) Minimum cross-section (d) Least radius of gyration

Last Answer : (d) Least radius of gyration

Under sagging bending moment, the uppermost fiber of the beam is in (a) Shear (b) Compression (c) Tension (d) None)

Description : Under sagging bending moment, the uppermost fiber of the beam is in (a) Shear (b) Compression (c) Tension (d) None)

Last Answer : (b) Compression