A metal having a Poisson's ratio = 0.3 is elastically deformed under uniaxial tension. If the longitudinal strain = 0.8, then the magnitude of thickness strain is
(A) -0.8
(B) 0.8
(C) +0.08
(D) -0.24

1 Answer

Answer :

(D) -0.24

Related questions

Description : An open-ended cylinder of radius and thickness is subjected to internal pressure . The Young's modulus for the material is and Poisson's ratio is . The longitudinal strain is (A) Zero (B) pr/TE (C) pr/2TE (D) None of these

Last Answer : (A) Zero

Description : As compared to uniaxial tension or compression, the strain energy stored in bending is only  (A) 1/8  (B) 1/4  (C) 1/3  (D) 1/2 

Last Answer : (C) 1/3 

Description : Poisson’s ratio is a. Lateral strain / Longitudinal strain b. Shear strain / Lateral strain c. Longitudinal strain / Lateral strain d. Lateral strain / Volumetric strain

Last Answer : a. Lateral strain / Longitudinal strain

Description : Which of the following facts are true for resilience? a) Ability of material to absorb energy when deformed elastically b) Ability to retain deformation under the application of load or after removal ... c) Ability of material to absorb energy when deformed plastically d) None of the mentioned

Last Answer : a) Ability of material to absorb energy when deformed elastically

Description : cylindrical rod subjected to a tensile strain within the elastic limit undergoes a volume change. If the volume strain is equal to half the tensile strain, then the Poisson's ratio of the rod is (A) 0 (B) 0.33 (C) 0.44 (D) 0.25

Last Answer : Option C

Description : If Poisson's ratio of a resistance wire strain gauge is 1.8, then neglecting piezo-resistive effects, its Gauge factor is :  (A) 2.8 (B) 2.6 (C) 4.6 (D) 3.6

Last Answer : If Poisson's ratio of a resistance wire strain gauge is 1.8, then neglecting piezo-resistive effects, its Gauge factor is : 4.6

Description : What is the sudden return of elastically deformed rock to an undeformed shape?

Last Answer : Feel Free to Answer

Description : Resilience is defined as the property of material to absorb energy when deformed _________ and to release this energy when unloaded. a) Elastically b) Plastically c) Up to fracture point d) None of the listed

Last Answer : a) Elastically

Description : The ratio of lateral strain to axial strain of a homogeneous material, is known  (A) Yield ratio  (B) Hooke's ratio  (C) Poisson's ratio  (D) Plastic ratio 

Last Answer : (C) Poisson's ratio 

Description : The ratio of lateral strain to linear strain is called (a) Modulus of Elasticity (b) Modulus of Rigidity (c) Bulk Modulus (d) Poisson’s Ratio

Last Answer : (d) Poisson’s Ratio

Description : Define volumetric strain. Also give the relation between lateral strain to and Poisson’s ratio. 

Last Answer : Volumetric strain: Volumetric strain is defined as the ratio of change in volume to original volume.

Description : square cross section b/h/h'=400/400/40mm with a reinforcement ratio of p=0.015 is loaded for action forces of axial load plus uniaxial bending.the column is to be made of C25/30 concrete & S-460 steel.check whether the column AB is short or long?

Last Answer : 10001/999900

Description : The law which states, "Within elastic limits strain produced is proportional to the stress producing  it", is known as  (A) Bernoulli's law  (B) Stress law  (C) Hooke's law  (D) Poisson's law

Last Answer : (C) Hooke's law 

Description : Energy in deformed solid is called A. stress energy B. potential energy C. kinetic energy D. strain energy

Last Answer :  strain energy

Description : The modulus of rigidity is the ratio of (1) Longitudinal stress to longitudinal strain (2) Volume stress to volume strain (3) Shearing stress to shearing strain (4) Tensile stress to tensile strain

Last Answer : (3) Shearing stress to shearing strain Explanation: In materials science, shear modulus or modulus of rigidity, denoted by G, or sometimes S , is defined as the ratio of shear stress to the shear ... the case of an object that's shaped like a rectangular prism, it will deform into a parallelepiped.

Description : The modulus of rigidity is the ratio of (1) longitudinal stress to longitudinal strain (2) Volume stress to volume strain (3) shearing stress to shearing strain (4) tensile stress to tensile strain

Last Answer : shearing stress to shearing strain

Description : A column said to be under uniaxial bending, when the eccentricity is [ A ] with respect to one axis only [ B ] with respect to two axes [ C ] zero [ D ] 20 mm

Last Answer : [ A ] with respect to one axis only

Description : Under complex loading, if elastic limit reaches in tension, then failure occurs due to (a) Firstly Maximum principal strain theory (b) Secondly Maximum principal theory of strain energy (c) Thirdly Maximum Principal stress theory (d) None

Last Answer : (c) Thirdly Maximum Principal stress theory

Description : Under complex loading, if elastic limit reaches in tension, then failure occurs due to (a) Firstly Maximum principal strain theory (b) Secondly Maximum principal theory of strain energy (c) Thirdly Maximum shear stress theory (d) None

Last Answer : (d) None

Description : A steel bar 5 m × 50 mm is loaded with 250,000 N. If the modulus of elasticity of the material is 0.2  MN/mm2  and Poisson's ratio is 0.25, the change in the volume of the bar is:  (A) 1.125 cm3 (B) 2.125 cm3 (C) 3.125 cm3 (D) 4.125 cm

Last Answer : (C) 3.125 cm

Description : For a given material Young's modulus is 200 GN/m2 and modulus of rigidity is 80 GN/m2 . The value of Poisson's ratio is (A) 0.15 (B) 0.20 (C) 0.25 (D) 0.30

Last Answer : (C) 0.25

Description : Which of the following relationships is correct for relating the three elastic constants of an isotropic elastic material (where, E = Young's modulus, G = Modulus of rigidity or shear modulus v = Poisson's ratio)? (A) E = 2G (1 + v) (B) E = G (1 + v) (C) E = G (1 + v)/2 (D) E = 2G (1 + 2v)

Last Answer : (A) E = 2G (1 + v)

Description : Pick out the wrong statement. (A) A soft magnetic material should have high permeability and small area of hysteresis loop (B) Poisson's ratio of high melting point metals is more than unity (C) ... less than 185°C (D) Steel produced by B.O.F process is ideally suited for manufacturing flat product

Last Answer : Option B

Description : When a wire is stretched to double in length, the longitudinal strain produced in it is (a) 0.5 (b) 1.0 (c) 1.5 (d) 2.0

Last Answer : b) 1.0

Description : A concrete block subjected to shear stresses, then the failure may result by [ A ] Diagonal tension [ B ] Longitudinal tension [ C ] Diagonal compression [ D ] None of the above

Last Answer : [ A ] Diagonal tension

Description : A material no longer behaves elastically beyond (A) Plastic limit (B) Limiting load (C) Elastic limit (D) Breaking load

Last Answer : (C) Elastic limit

Description : Define Poisson’s ratio.

Last Answer : Define Poisson’s ratio.

Description : The value of Poisson's ratio always remains (A) Greater than one (B) Less than one (C) Equal to one (D) None of these

Last Answer : (B) Less than one

Description : Poisson's ratio for concrete (A) Remains constant (B) Increases with richer mixes (C) Decreases with richer mixes (D) None of these

Last Answer : Answer: Option B

Description : The relationship between Young’s modulus (E), Bulk modulus (K) and Poisson’s ratio (μ) is given by a. E=2K(1-2μ) b. E=3K(1-2μ) c. E=2K(1-2μ) d. E=2K(1-3μ)

Last Answer : b. E=3K(1-2μ)

Description : An 8-year-old child presented with brownish discoloured and deformed anterior teeth. History of having received an antibiotic about 4 years earlier was obtained. Which antibiotic could be responsible for the condition ? (a) Chloramphenicol (b) Tetracycline (c) Erythromycin (d) Genetamicin

Last Answer : Ans: B

Description : An 8-year-old child presented with brownish discoloured and deformed anterior teeth. History of having received an antibiotic about 4 years earlier was obtained. Which antibiotic could be responsible for the condition: A. Chloramphenicol B. Tetracycline C. Erythromycin D. Gentamicin

Last Answer : Tetracycline

Description : Pick up the correct statement from the following:  (A) Hoop strain of the walls of a cylinder due to liquid is (pd/2tE) (1 - 1/2m)  (B) Longitudinal strain in the walls of a cylinder due to liquid is ... change in the cylinder due to liquid is (pd/2tE) (5/2 - 2/m)  (D) All the above 

Last Answer : (D) All the above 

Description : If a circular beam of diameter d experiences a longitudinal strain P/E and a lateral strain 2P/mE, the volumetric strain is (A) (P/E) + (2P/mE) (B) (P/E) - (2P/mE) (C) (P/E) + (mE/2P) (D) (P/E) - (mE/2P)

Last Answer : (B) (P/E) - (2P/mE)

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

Last Answer : d) None

Description : Pick out the wrong statement. (A) Surface tension of a liquid is because of the difference in magnitude of adhesive & cohesive forces (B) A hydrometer used for the determination of ... Turbulent fluid flow is characterised by the rapid fluctuation of instantaneous pressure & velocity at a poin

Last Answer : (C) In case of unsteady fluid flow, the velocity at any given point does not change with time

Description : For the same dimensions of the shaft which of the following has the greater natural frequency? A. Transverse B. Longitudinal C. Depends on thickness D. Depends upon length

Last Answer : B. Longitudinal

Description : For the same dimensions of the shaft which of the following has the greater natural frequency? (A) Transverse (B) Longitudinal (C) Depends on thickness (D) Depends upon length

Last Answer : (B) Longitudinal

Description : For the same dimensions of the shaft which of the following has the greater natural frequency? a) Transverse b) Longitudinal c) Depends on thickness d) Depends upon length

Last Answer : b) Longitudinal

Description : If the width of a pavement slab is 7.5 m, thickness 20 cm and working stress 1400 kg/cm2 , spacing of 10 mm tie bars for the longitudinal joint, is (A) 10 cm (B) 20 cm (C) 30 cm (D) 40 cm

Last Answer : Answer: Option C

Description : The maximum longitudinal pitch in bolted joints, subjected to tensile forces, wherein t = thickness of the plate and D = diameter of bolt, is (a) 32 D (b) 16 D (c) 32 t (d) 16 t

Last Answer : (d) 16 t

Description : Castigliano's first theorem is applicable (A) For statically determinate structures only (B) When the system behaves elastically (C) Only when principle of superposition is valid (D) None of the above

Last Answer : (C) Only when principle of superposition is valid

Description : The limit beyond which the material does not behave elastically is known as (a) Proportional limit (b) Elastic limit (c) Plastic limit (d) Yield Point

Last Answer : (b) Elastic limit

Description : What is 0.08 divided by 0.24?

Last Answer : 0.3333

Description : What is 0.24 divided by 0.08?

Last Answer : 3

Description : It is desired to concentrate a 20% salt solution (20 kg of salt in 100 kg of solution) to a 30% salt solution in an evaporator. Consider a feed of 300 kg/min at 30°C. The boiling point of the solution is 110°C, the latent heat of ... 3.06 10 5 (B) 6.12 10 5 (C) 7.24 10 5 (D) 9.08 10

Last Answer : (A) 3.06 × 10

Description : A wall has two layers of materials A and B; each made of a different material. Both the layers have the same thickness. The thermal conductivity of material A is twice that of B. Under the equilibrium, the temperature ... difference across the layer A is __________ °C. (A) 6 (B) 12 (C) 18 (D) 24

Last Answer : (B) 12

Description : A water main 1 m in diameter contains a fluid having pressure 1 N/mm2. If the maximum permissible tensile stress in the metal is 20 N/mm2, th thickness of the metal required would be a) 2 cm b) 2.5cm c) 1 cm d) 0.5 cm

Last Answer : b) 2.5cm

Description : Pick out the wrong statement. (A) Lead can creep under its own weight at room temperature (B) The electrical conductivity of gold is considerably reduced by alloying additions due to ... metal (D) With increase in temperature, the electrical conductivity of intrinsic semi-conductor will increase

Last Answer : (C) Recrystallisation temperature decreases with decrease in strain in a cold worked metal