Why I-section is used for rail tracks?

Why I-section is used for rail tracks?

a. Easy to manufactureb. Easy to handlec. Offers maximum bending resistanced. More corrosion resistance

Which is lighter 1 kg of cotton or 1 kg of steel

(a) 1 kg of cotton(b) 1 kg of steel(c) both are equal(d) cant say

What is the unit for stress?

(a) N/m2(b) N- m2(c) N/ m3(d) N-m

Which amongst the following substances, is most elastic?

(a) Brass(b) Glass(c) Rubber(d) Steel

What is the main shaft of an engine that controls the movement of piston ?

(a) axle(b) drive shaft(c) crankshaft(d) camshaft

The purpose of jigs and fixtures are to

a. Increased production rateb. Increased machining accuracyc. Facilitate interchangeable manufacturingd. Enable employ less skilled operatorse. All of the above

Cast iron is characterized by minimum of following % of carbon

a. 0.2%b. 0.8%c. 1.3%d. 2%e. None of the above

Ductility of material can be defined as

a. Ability to undergo large permanent deformation in compressionb. Ability to recover its original formc. Ability to undergo large permanent deformation in tensiond. All of the abovee. None of the above

If a material expands freely due to heating, it will developa. Thermal stressb. Tensile stressc. Bendingd. Compressive stresse. No stress

The impact strength of an material is an index of its

a. Toughnessb. Tensile strengthc. Capability of being cold workedd. Hardnesse. Fatigue strength

Time dependent permanent deformation is called ________________.(a) Plastic deformation (b) Elastic deformation (c) Creep (d) Anelastic deformation Figure-out the odd point in the following

(a) Proportinal limit (b) Elastic limit (c) Yeild point (d) Fracture point If a material is subjected to two incremental true strains namely 1 and 2, then the total true strain is

(a) 1 * 2 (b) 1 - 2 (c) 1 + 2 (d) 1 / 2 Engineering stress-strain curve and True stress-strain curve are equal up to(a) Proportional limit (b) Elastic limit (c) Yeild point (d) Tensile strength point Value of Poissons ratio for ionic solids in the range of(a) 0.1 (b) 0.2 (c) 0.3 (d) 0.4Hydrostatic stress results in the following(a) Linear strain (b) Shear strain (c) Both linear and shear strains (d) NoneHigh elastic modulus in materials arises from(a) High strength of bonds (b) Weak bonds (c) combination of bonds (d) NoneShape of true stress-strain curve for a material depends on(a) Strain (b) Strain rate (c) Temperature (d) AllToughness of a material is equal to area under ____________ part of the stress-strain curve.(a) Elastic (b) Plastic (c) Both (d) NoneSpring index is

a. Ratio of coil diameter to wire diameterb. Load required to produce unit deflectionc. Its capability of storing energyd. Indication of quality of springe. Nothing

Nodular iron has

a. High machinabilityb. Low melting pointc. High tensile strengthd. Good fluiditye. All of the above

Which ONE of the following engineering materials is a synthetic composite?Brass Stainless steel High-carbon steel Automobile tire

Tensile stress is stress that acts ...

parallel to a surface. perpendicular to a surface. against the shortening of an object. against the lengthening of an object.Which ONE of the following is the purpose of lubrication?

To reduce friction To reduce wear To prevent corrosion All the above-mentionedA wedge is an example of a(n):(A) pulley(B) incline plane(C) lever(D) gearThe bed of a machine tool is normally made ofC.I.Medium Carbon steelAlloy steelMild steel

If a force of 200 pounds is exerted over an area of 10 square inches, what is the psi?(A) 10(B) 15(C) 20(D) 200For transmitting power between two shafts which are at right angles but non-intersecting, the gearing used is worm and worm wheelspur gearinghelical gearingbevel gearing