Description : Which stress is the least in a thin shell a. Longitudinal stress b. Hoop stress c. Radial stress d. None
Last Answer : c. Radial stress
Description : 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
Last Answer : c. 1:2
Description : Stresses in a thin cylindrical shell under internal pressure is independent of a. Diameter b. Thickness c. Length d. Diameter and thickness
Last Answer : c. Length
Description : Radial stress in a thin shell is given by a. pD/2t b. pD/4t c. pD/3t d. None
Last Answer : d. None
Description : Hoop strain in a thin shell is a) σh /E b) σl /E c) 3 σh /E d) None
Last Answer : d) None
Description : Hoop shrinking in thick cylinders is done to achieve (a) Increased stresses (b) Decreased stresses (c ) Uniform stresses (d) None
Last Answer : Hoop shrinking technique is used to make the stresses on the cylinder walls evenly distributed around the circumference of the cylinder, which results in a uniform stress distribution. This is important for ... under load. It also makes sure that the cylinder can withstand the pressure inside it.
Description : A thin spherical shell under internal pressure will fail under a. Maximum shear stress b. Principal compressive stress c. Principal tensile stress d. None
Last Answer : c. Principal tensile stress
Description : Hoop stress in a thin vessel is a. pD/2t b. pD/4t c. pD/3t d. None
Last Answer : a. pD/2t
Description : Which one is most important in a thin shell? a) d/t 10 c) Stresses are uniform d) None
Last Answer : c) Stresses are uniform
Description : 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 ... and zero at the outer surface d) maximum at the outer surface and zero at the inner surface
Last Answer : c) maximum at the inner surface and zero at the outer surface
Description : Longitudinal strain in a thin shell is a) σh /E b) σl /E c) σr /E d) None
Description : Circumferential welded joint fails by i. Longitudinal stress ii. Radial stress iii. Hoop stress iv. None
Last Answer : i. Longitudinal stress
Description : Longitudinal welded joint fails by Longitudinal stress Radial stress Hoop stress None
Last Answer : Hoop stress
Description : 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
Last Answer : c. Longitudinal as well as circumferential joint
Description : In a thin shell which stress is negligible a) σh b) σl c) σr d) None
Last Answer : c) σr
Description : A thin cylindrical shell under internal pressure can fail by a. Shear b. Compression c. Tension d. None
Last Answer : c. Tension
Description : A thick cylinder is subjected to an internal pressure of 60 MPa. If the hoop stress on the outer surface is 150 MPa, then the hoop stress on the internal surface is a) 105 MPa b) 180 MPa c) 210 MPa d) 135 MPa.
Last Answer : c) 210 MPa
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
Last Answer : b) an increase in diameter and length of the shell
Description : 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
Last Answer : b. Spherical shell
Description : In a thick-cylinder pressurized from inside, the hoop stress is maximum at a) The center of the wall thickness b) the outer radius c) the inner radius d) both the inner and the outer radii
Last Answer : c) the inner radius
Description : The thick shell is made from laminations to get (a) Increased stresses (b) Decreased stresses (c) Uniform stresses (d) None
Last Answer : (c) Uniform stresses
Description : Lame's theory is associated with a) thick cylindrical shells b) thin cylindrical shells c) direct and bending stresses d) none of these
Last Answer : a) thick cylindrical shells
Description : 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
Last Answer : b. Stresses are uniform over the entire thickness
Description : Value of σr in a thin shell is a) pD/2t b) pD/4t c) pD/3t d) None
Description : Which is most predominant type of failure in a thin shell? a. Bearing failure b. Compression failure c. Crushing failure d. None
Description : eaf springs are designed on the basis of (a) Maximum bending stresses (b) Maximum deflection (c) Maximum bending as well as maximum deflection (d) None
Last Answer : (c) Maximum bending as well as maximum deflection
Description : 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
Last Answer : b) 1.5 kg/cm2
Description : What will happen if stresses induced due to surge in the spring exceeds the endurance limit stress of the spring. (a) Fatigue Failure (b) Fracture (c) None of the listed (d) Nipping
Last Answer : (a) Fatigue Failure
Description : If is the internal pressure in a thin cylinder of diameter and thickness , the developed hoop stress, is (A) pd/2t (B) pd/4t (C) pd/t (D) 2pd/t
Last Answer : (A) pd/2t
Description : Longitudinal stress in a cylinder is given by [symbols have their usual meanings]. a) PD/2t b) 2PD/t c) PD/4t d) 4PD/t
Last Answer : c) PD/4t
Description : When a bar is subjected to a change of temperature and its longitudinal deformation is prevented, the stress induced in the bar is (a) Tensile (b) Compressive (c) Shear (d) Temperature
Last Answer : (d) Temperature
Description : The stress in the wall of a cylinder in a direction normal to its longitudinal axis, due to a force acting along the circumference, is known as (A) Yield stress (B) Longitudinal stress (C) Hoop stress (D) Circumferential stress
Last Answer : (C) Hoop stress
Description : Which stress is constant in a thick shell a) σh b) σl c) σr d) None
Last Answer : b) σl
Description : Maximum shear stress in a thick shell is a) (σh+ σl)/2 b) (σh+ σr)/2 c) (σh– σl)/2 d) None
Last Answer : b) (σh+ σr)/2
Description : In a thick shell which stress is negligible a) σh b) σl c) σr d) None
Description : A pressure conduit laid underground, may not be subjected to (A) Internal pressure of water (B) Pressure due to external load (C) Longitudinal temperature stress (D) Longitudinal stresses due to unbalanced pressure to bends
Last Answer : (C) Longitudinal temperature stress
Description : A close coiled spring under axial load produces (a) Bending stresses (b) Shear stresses (c) Tensile stresses (d) None
Last Answer : (b) Shear stresses
Description : A transmission shaft subjected to bending loads must be designed on the basis of (a) maximum normal stress theory (b) maximum shear stress theory (c) maximum normal stress and maximum shear stress theories (d) fatigue strength
Last Answer : (a) maximum normal stress theory
Description : The longitudinal shearing stresses acting on the surface between the steel and concrete are called. (a) Bond stress (b) Tensile stresses (c) Compressive stresses (d) None of these
Last Answer : (a) Bond stress
Description : A thick cylinder under internal fluid pressure’ pi will have maximum stress at the 1. Outer radius 2. Inner radius 3. Mean radius 4. None
Last Answer : 2. Inner radius
Description : A thick cylinder under external fluid pressure’ p0′ will have maximum stress at the 1. Outer radius 2. Inner radius 3. Mean radius 4. None
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
Description : The criteria for the design of a shaft is the stress at (a) The external surface (b) The axis (c) Any inside layer (d) Any of these
Last Answer : (a) The external surface
Description : Propagation of fatigue failure is always due to compressive stresses. (a) Due to bending (b) Due to tensile (c) Due to fatigue (d) None of the listed
Last Answer : (b) Due to tensile
Description : Keeping loading same but increasing the length, normal stresses in a long column will (a) Increase (b) Decrease (c) No change (d) None
Last Answer : (b) Decrease
Description : Keeping loading same but increasing the length, shear stresses in a beam will (a) Increase (b) Decrease (c) No change (d) None
Last Answer : (c) No change
Description : Keeping loading same but increasing the length, normal stresses in a beam will (a) Increase (b) Decrease (c) No change (d) None
Last Answer : (a) Increase
Description : Nature of stresses produced in buckling and bending are (a) Same (b) Different (c) Only tensile (d) None
Last Answer : (a) Same
Description : In shafts with keyways the allowable stresses are usually ------------ proportional to the twisting moment. a.25% b. 50% c. 75% d. 95%
Last Answer : c. 75%
Description : Ratio of diameters of two shafts joined in series is 2. If the two shafts have the same material and the same length the ratio of their shear stresses is a. 2 b. 4 c. 8 d. 16
Last Answer : c. 8