Description : Pick out the correct statement. (A) Materials exhibiting high elasticity obey Hooke's law (B) The elastic behaviour of rubber under compression is the same as its behaviour under tension (C) ... to its plastic deformation (D) The stress required to cause plastic flow in polycrystalline material is
Last Answer : Option B
Description : All materials obey Hooke's law within elastic limit. When elastic limit is reached, the tensile strain (A) Increases very quickly (B) Decreases very quickly (C) Increases in proportion to stress (D) Decreases in proportion to stress
Last Answer : (A) Increases very quickly
Description : At yield point' of a copper wire A. the load hasn't exceeded the elastic limit yet; so, Hooke's law applies B. the load has already exceeded the elastic limit and the material has become ... stage has passed and the wire has snapped already D. Like Brass and Bronze, Copper has no yield poin
Last Answer : the load has already exceeded the elastic limit and the material has become plastic
Description : Hooke's law states that A. the extension is proportional to the load when the elastic limit is not exceeded B. the extension is inversely proportional to the load when the elastic limit is not ... is independent of the load when the elastic limit is not exceeded D. load is dependent on extension
Last Answer : the extension is proportional to the load when the elastic limit is not exceeded
Description : Every material obeys the Hooke's law within its (A) Elastic limit (B) Plastic point (C) Limit of proportionality (D) None of these
Last Answer : (C) Limit of proportionality
Description : Hooke's law (A) Applies to elastic deformation (B) Applies beyond limit of proportionality in stress-strain curve (C) States that stress is inversely proportional to strain upto elastic limit (D) None of these
Last Answer : (A) Applies to elastic deformation
Description : The statement : stress is proportional to strain, i.e. the Hooke’s law holds good upto (a) Elastic Limit (b) Proportional Limit (c) Plastic Limit (d) Yield point
Last Answer : (b) Proportional Limit
Description : Every material obeys the Hooke’s law within (a) Elastic limit (b) Plastic limit (c) Limit of proportionality (d) None of these
Last Answer : c) Limit of proportionality
Description : Hooke’s law is applicable within (a)Elastic limit (b)Plastic limit (c)Fracture point (d) Ultimate strength
Last Answer : (a)Elastic limit
Description : At yield point of a test piece, the material (A) Obeys Hooke's law (B) Behaves in an elastic manner (C) Regains its original shape on removal of the load (D) Undergoes plastic deformation
Last Answer : (D) Undergoes plastic deformation
Description : Muller Breslau's principle for obtaining influence lines is applicable to (i) Trusses (ii) Statically determinate beams and frames (iii) Statically indeterminate structures, the material of which is elastic and follows Hooke's law (iv ... B) (i), (ii) and (iv) (C) (i) and (ii) (D) Only (i)
Last Answer : (A) (i), (ii) and (iii)
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 : What is the maximum value of deforming force upto which a material shows elastic property and above which the material loses it? (1) Elasticity (2) Strain (3) Elastic Limit (4) Stress
Last Answer : (3) Elastic Limit Explanation: The Maximum Extent to which a solid may be stretched without permanent alteration of size or shape.
Description : What is the maximum value of deforming force up to which a material shows elastic property and above which the material loses it? (1) Elasticity (2) Strain (3) Elastic Limit (4) Stress
Last Answer : (4) Elastic Limit Explanation: The Maximum Extent to which a solid may be stretched without permanent alteration of size or shape.
Description : When stress is increased beyond elastic limit and material is permanently changed this property is a) Permanent stress b) Elasticity c) Yield strength d) Plasticity
Last Answer : d) Plasticity
Description : Define Hooke’s law with expression.
Last Answer : Hook’s law. It states that when a material is loaded within its elastic limit, the stress produced is directly proportional to the strain.
Description : Define velocity gradient and state its unit
Last Answer : Velocity Gradient: It is defined as the change in velocity per unit change in vertical distance of the layer from the fixed layer. Unit = per second OR 1/ sec
Description : Define compressibility. State its SI unit.
Last Answer : Compressibility: The reciprocal of bulk modulus of elasticity is called as compressibility. OR The property on account of which the body can be compressed by the application of external force is called compressibility. S.I. Unit:- m2/N
Description : Define surface tension. State its S.I. unit.
Last Answer : Definition:- The force acting per unit length of an imaginary line drawn to surface of liquid. OR The surface tension is defined as the property of liquids by virtue of which the surface of a liquid is ... due to the tendency to contract and occupy minimum surface area. S.I. unit :- N/m
Description : State Hooke’s law. Draw a labelled graph of tensile stress against tensile strain for a metal wire
Last Answer : State Hooke's law. Draw a labelled graph of tensile stress against tensile strain for a metal wire up ... the region in which Hooke's law is obeyed.
Description : State the conditions under which Hooke’s law holds good.
Last Answer : State the conditions under which Hooke’s law holds good.
Description : Define: i) Elastic limit ii) Factor of safety .
Last Answer : i) Elastic limit: -It is the maximum value of the stress upto which the body shows elasticity. ii) Factor of Safety: It is defined as the ratio of ultimate stress to working stress.
Description : Define. i) Streamline flow ii) Turbulent flow Give significance of Reynold’s number.
Last Answer : i) Streamline flow The flow of liquid in which every particle of liquid moves in the same direction of flow of liquid is called streamline flow. ii) Turbulent flow The flow of liquid in which every ... to 3000 liquid flow is unstable. (3)When R is greater than 3000 liquid flow is turbulent.
Description : Define the principles of superposition of waves.
Last Answer : Principle of superposition of wave: When two waves travelling through a medium arrive at a point simultaneously, each wave produces its own displacement at that point. The resultant displacement at that point is equal to the vector sum of the individual displacement of the two waves.
Description : Define transverse wave. Give one example.
Last Answer : Transverse waves: The wave in which direction of vibration of particles of material medium is perpendicular to the direction of propagation of wave is called transverse wave. Example: Light wave, electromagnetic waves etc.
Description : Define the two specific heats of gas.
Last Answer : Specific heat of a gas at constant volume - Specific heat of a gas at constant volume is defined as the amount of heat required to increase the temperature of unit mass of a gas by one degree at ... heat required to increase the temperature of unit mass of a gas by one degree at constant pressure.
Description : Define simple harmonic motion. Give its two example.
Last Answer : Simple harmonic motion: The to and fro motion of the object about its mean position is called simple harmonic motion. Examples: motion of swing, motion of sewing machine , motion of clock pendulum , etc.
Description : Define capillarity. Give its any two examples.
Last Answer : Capillarity: - The rise or fall of a liquid inside the capillary is called as capillarity. Examples (1) Oil rises up to the end of wick of lamp due to capillarity. (2) The water and minerals ... capillarity. (3) A blotting paper absorbs ink due to capillarity. (4) Rise of ink through pen nib.
Description : Define Cohesive force and Adhesive force
Last Answer : i) Cohesive force: - It is the force of attraction between two molecules of same substance. ii) Adhesive force: - It is the force of attraction between two molecules of different substance.
Description : Define amplitude and periodic time of a vibrating particle.
Last Answer : Amplitude (a):- The maximum displacement of particle from its mean position on either side is called amplitude. Periodic time:- The time taken by a wave to complete one oscillation is called periodic time.
Description : Define isothermal and Adiabatic process.
Last Answer : Isothermal process:- The process in which volume of a gas changes keeping its temperature constant is called isothermal change. Adiabatic process:- The process in which volume of a gas changes with change in temperature is called Adiabatic change.
Description : Define specific heat of a gas at constant pressure and at constant volume.
Last Answer : Specific heat of a gas at constant volume:- Specific heat of a gas at constant volume is defined as the amount of heat required to increase the temperature of unit mass of a gas by one degree at ... heat required to increase the temperature of unit mass of a gas by one degree at constant pressure.
Description : Define absolute zero temperature and one calorie
Last Answer : Absolute zero temperature:- The temperature at which both pressure and volume of gas become theoretically zero is called absolute zero temperature. Calorie: The amount of heat is required to increase the temperature of 1gm of water by 10C is called calorie.
Description : Define the term i) Ultimate stress ii) Factor of safety.
Last Answer : i) Ultimate Stress:- It is defined as the ratio of maximum load that the specimen (system) can withstand to original cross-sectional area of specimen. ii) Factor of Safety:- It is defined as the ratio of ultimate stress to working stress.
Description : Skin becomes wrinkled in the old age due to (a) loss of elastic tissue in the dermis (b) considerable slag in the rate of dividing cells in the stratum germinativum (c) gradual loss of elasticity in the subcutaneous layer (d) all of these
Last Answer : Ans:(b)
Description : Elasticity (e) expressed by the formula 1 > e > 0 is - (1) Perfectly elastic (2) Relatively elastic (3) Perfectly inelastic (4) Relatively inelastic
Last Answer : (4) Relatively inelastic Explanation: Elasticity (e) expressed by the formula 1 > e > 0 is relatively inelastic. Elasticity is responsiveness of one variable to a change in another, when other conditions are held constant.
Description : A horizontal demand curve is - (1) relatively elastic (2) perfectly inelastic (3) perfectly elastic (4) of unitary elasticity
Last Answer : (3) perfectly elastic Explanation: The demand curve facing a perfectly competitive firm is flat or horizontal. This is because all firms in perfect competition are by definition selling an identical (homogeneous) ... of the curve is zero, it is impossible for the price to change in the market.
Description : The tendency of a deformed solid to regain its actual proportions instantly upon unloading known as ______________ a) Perfectly elastic b) Delayed elasticity c) Inelastic effect d) Plasticity
Last Answer : a) Perfectly elastic
Description : The ratio of shear stress and shear strain of an elastic material, is (A) Modulus of Rigidity (B) Shear Modulus (C) Modulus of Elasticity (D) Both (a) and (b)
Last Answer : (D) Both (a) and (b)
Description : Which one of the following statements is not correct with respect to PSC beams? (a) Loss due to shrinkage is proportional to water-cement ratio used in concrete (b) Loss due to creep is ... to the modulus of elasticity of concrete (d) Loss due to friction occurs in post tensioned concrete members
Last Answer : (c) Loss due to elastic deformation is directly proportionally to the modulus of elasticity of concrete
Description : Modulus of elasticity of concrete is primarily influenced by [ A ] Elastic properties of aggregate [ B ] Curing of concrete [ C ] Age of concrete [ D ] Mix proportion and type of cement
Last Answer : [ A ] Elastic properties of aggregate
Description : The ductility of metal is usually expressed in terms of the: A. Yield strength (point where the material is not longer elastic) B. Percent elongation C. Modulus of elasticity (stiffness of the material)
Last Answer : B. Percent elongation
Description : A Gold clasp is more elastic than Cobalt Chrome, but Co-Chrome has high modulus of elasticity. A. The first statement is false the second is true B. Both are true C. The first is true the second is false D. Both are false
Last Answer : B. Both are true
Description : Very short period is the market condition where the supply remain perfectly (a) Elastic ; (b) Inelastic ; (c) Unity elastic ; (d) Elasticity less than 1
Last Answer : (b) Inelastic ;
Description : Price elasticity demand of product will be more elastic if it (a) Has no substitutes ; (b) Has number of substitutes ; (c) Is an item of necessity; (d) Is life saving Product
Last Answer : ; (b) Has number of substitutes ;
Description : Elasticity (e) expressed by the formula l > e > 0 is (1) Perfectly elastic (2) Relatively elastic (3) Perfectly inelastic (4) Relatively inelastic
Last Answer : Relatively inelastic
Description : A horizontal demand curve is (1) ralatively elastic (2) perfectly inelastic (3) perfectly elastic (4) of unitary elasticity
Last Answer : perfectly elastic
Description : What is Hooke's Law? (1) Stress is inversely proportional to strain. (2) Stress is directly proportional to strain. (3) Stress and strain are dependent on each other. (4) Stress and strain are independent of each other.
Last Answer : (2) Stress is directly proportional to strain. Explanation: Hooke's law is a principle of physics that states that the force (F) needed to extend or compress a spring by some distance X scales linearly with respect to that distance.
Description : What is Hooke’s Law? (1) Stress is inversely proportional to strain. (2) Stress is directly proportional to strain. (3) Stress and strain are dependent on each other. (4) Stress and strain are independent of each other.
Last Answer : (2) Stress is directly proportional to strain. Explanation: Hooke’s law is a principle of physics that states that the force (F) needed to extend or compress a spring by some distance X scales linearly with respect to that distance.