What is the stress in a wire which is 50m long and 0.01cm^2 in cross section, if the wire bears a load of 100kg?

What is the stress in a wire which is 50m long and 0.01cm^2 in cross section, if the wire bears a load of 100kg?
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What is the stress in a wire which is 50m long and 0.01cm2 in cross section, if the wire bears a load of 100kg?
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Two trains, both 50m long, moving in opposite directions cross each other in 4 seconds. If one is moving thrice as fast the other, then the speed of the faster train is. A) 45km/hr B) 19 km/hr C) 95 km/hr D) 67.5 km/hr

Description : Two trains, both 50m long, moving in opposite directions cross each other in 4 seconds. If one is moving thrice as fast the other, then the speed of the faster train is. A) 45km/hr B) 19 km/hr C) 95 km/hr D) 67.5 km/hr

Last Answer : ANSWER:D Explanation:  Let the speed of the slower train be x' m/sec  The speed of the sfaster train = 3x m/s  Relative speed = (x +3x)m/sec  = 4x m/sec  50 + 50 / 4 = 4x  100 / 4 = 4x  100 = 16x  x = 100 ... the faster train = 3 * 25 / 4  = 75 / 4 m/s = (75/4 *18 /5)km/hr  = 67.5 km/hr

A simply supported wooden beam 150 cm long and having a cross section 16 cm × 24 cm carries a concentrated load, at the centre. If the permissible stress ft = 75 kg/cm2 and fs= 10 kg/cm2 the safe load is (A) 3025 kg (B) 3050 kg (C) 3075 kg (D) 3100 kg

Description : A simply supported wooden beam 150 cm long and having a cross section 16 cm × 24 cm carries a  concentrated load, at the centre. If the permissible stress ft = 75 kg/cm2  and fs= 10 kg/cm2  the safe  load is  (A) 3025 kg  (B) 3050 kg  (C) 3075 kg  (D) 3100 kg 

Last Answer : (C) 3075 kg 

The load shared by each spring is inversely proportional to the cross section of wire. a) Yes b) No, it is directly proportional c) It is proportional to its square d) It is proportional to its square root

Description : The load shared by each spring is inversely proportional to the cross section of wire. a) Yes b) No, it is directly proportional c) It is proportional to its square d) It is proportional to its square root

Last Answer : b) No, it is directly proportional

If a concrete column 200 × 200 mm in cross-section is reinforced with four steel bars of 1200 mm2 total cross-sectional area. Calculate the safe load for the column if permissible stress in concrete is 5 N/mm2 and Es is 15 Ec (A) 264 MN (B) 274 MN (C) 284 MN (D) 294 MN

Description : If a concrete column 200 200 mm in cross-section is reinforced with four steel bars of 1200  mm2  total cross-sectional area. Calculate the safe load for the column if permissible stress in  concrete is 5 N/mm2 ... 15 Ec (A) 264 MN  (B) 274 MN  (C) 284 MN  (D) 294 MN 

Last Answer : (C) 284 MN 

The region of the cross-section of a column in which compressive load may be applied without producing any tensile stress, is known as the core of the cross-section. In circular columns the radius of the core, is (A) One-half of the radius (B) One-third of the radius (C) One-quarter of the radius (D) One-fifth of the radius

Description : The region of the cross-section of a column in which compressive load may be applied without producing any tensile stress, is known as the core of the cross-section. In circular columns the radius of the core, ... One-third of the radius (C) One-quarter of the radius (D) One-fifth of the radius

Last Answer : (C) One-quarter of the radius

In a bar of large length when held vertically and subjected to a load at its lower end, its own￾weight produces additional stress. The maximum stress will be (A) At the lower cross-section (B) At the built-in upper cross-section (C) At the central cross-section (D) At every point of the bar

Description : In a bar of large length when held vertically and subjected to a load at its lower end, its own￾weight produces additional stress. The maximum stress will be (A) At the lower cross-section (B) At the built-in upper cross-section (C) At the central cross-section (D) At every point of the bar

Last Answer : (B) At the built-in upper cross-section

The region of the cross-section of a column in which compressive load may be applied without producing any tensile stress, is known as the core of the cross-section. In circular columns the radius of the core, is (a) One-half of the radius (b) One-third of the radius (c) One-quarter of the radius (d) One-fifth of the radius

Description : The region of the cross-section of a column in which compressive load may be applied without producing any tensile stress, is known as the core of the cross-section. In circular columns the radius of the core, ... One-third of the radius (c) One-quarter of the radius (d) One-fifth of the radius

Last Answer : (c) One-quarter of the radius

A uniformly distributed load of 20 kN/m acts on a simply supported beam of rectangular cross section of width 20 mm and depth 60 mm. What is the maximum bending stress acting on the beam of 5m? a. 5030 Mpa b. 5208 Mpa c. 6600 Mpa d. Insufficient data

Description : A uniformly distributed load of 20 kN/m acts on a simply supported beam of rectangular cross section of width 20 mm and depth 60 mm. What is the maximum bending stress acting on the beam of 5m? a. 5030 Mpa b. 5208 Mpa c. 6600 Mpa d. Insufficient data

Last Answer : b. 5208 Mpa

The graphical representation of variation of axial load on y axis and position of cross section along x axis is called as _____ (a) Bending moment diagram (b) Shear force diagram (c) Stress-strain diagram (d) Trust diagram

Description : The graphical representation of variation of axial load on y axis and position of cross section along x axis is called as _____ (a) Bending moment diagram (b) Shear force diagram (c) Stress-strain diagram (d) Trust diagram

Last Answer : (d) Trust diagram

Real stress after load application is based on (a) Original area of cross section (b) Changing area of cross section (c) Final area of cross section under maximum load (d) None

Description : Real stress after load application is based on (a) Original area of cross section (b) Changing area of cross section (c) Final area of cross section under maximum load (d) None

Last Answer : b) Changing area of cross section

Unit stress after load application is based on (a) Original area of cross section (b) Changing area of cross section (c) Final area of cross section under maximum load (d) None

Description : Unit stress after load application is based on (a) Original area of cross section (b) Changing area of cross section (c) Final area of cross section under maximum load (d) None

Last Answer : (a) Original area of cross section

What is the strain in a cable of original length 50m whose length increases by 2.5cm when a load is lifted?

Description : What is the strain in a cable of original length 50m whose length increases by 2.5cm when a load is lifted?

Last Answer : What is the strain in a cable of original length 50m whose length increases by 2.5cm when a load is lifted?

The resistivity of a potentiometer wire is `40xx10^(-8)Omega-m` and its area of cross section is `8xx10^(-6)m^(2)`. If 0.2 A current is flowing throug

Description : The resistivity of a potentiometer wire is `40xx10^(-8)Omega-m` and its area of cross section is `8xx10^(-6)m^(2)`. If 0.2 A current is flowing throug

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A wire of 50 cm long, `1mm^(2)` in cross-section carries a current of 4 A, when connected to a 2 V battery, the resistivity of wire is

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Last Answer : A wire of 50 cm long, `1mm^(2)` in cross-section carries a current of 4 A, when connected to a 2 V ... `4xx10^(-6)Omega-m` D. `1xx10^(-6)Omega-m`

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?

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

A load of 1960 N is raised at the end of a steel wire. The minimum diameter of the wire so that stress in the wire does not exceed 100 N/mm2 is: (A) 4.0 mm (B) 4.5 mm (C) 5.0 mm (D) 5.5 mm

Description : A load of 1960 N is raised at the end of a steel wire. The minimum diameter of the wire so that  stress in the wire does not exceed 100 N/mm2  is:  (A) 4.0 mm  (B) 4.5 mm  (C) 5.0 mm  (D) 5.5 mm

Last Answer : (C) 5.0 mm 

Calculate critical damping coefficient in N/m/s from the following data: mass = 100Kg ω = 40rad/s a) 25,132 b) 26,132 c) 27,132 d) 28,132

Description : Calculate critical damping coefficient in N/m/s from the following data: mass = 100Kg ω = 40rad/s a) 25,132 b) 26,132 c) 27,132 d) 28,132

Last Answer : a) 25,132

Full grown apple tree requires a. No FYM b. Very low FYM c. 40-50 Kg FYM d. 80-100Kg FYM

Description : Full grown apple tree requires a. No FYM b. Very low FYM c. 40-50 Kg FYM d. 80-100Kg FYM

Last Answer : . 80-100Kg FYM

How much does an object having the mass of 100kg weight in newton.  a. 981 N  b. 991 N  c. 981.6 N  d. 980.1N F = ma

Description : How much does an object having the mass of 100kg weight in newton.  a. 981 N  b. 991 N  c. 981.6 N  d. 980.1N F = ma

Last Answer : 900,000lb/hr;625 ft/s981 N

The maximum quantity of aggregate per 50kg of cement should not axceed. (a) 100kg (b) 200kg (c) 350kg (d) 450kg

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Last Answer : (d) 450kg

A railway wagon moving with a speed of 1.5m/s is brought to rest by bumper consisting of two springs. Mass of wagon is 100kg. The springs are compressed by 125mm. Calculate the maximum force acting on each spring. a) 1200N b) 1500N c) 1800N d) 2000N

Description : A railway wagon moving with a speed of 1.5m/s is brought to rest by bumper consisting of two springs. Mass of wagon is 100kg. The springs are compressed by 125mm. Calculate the maximum force acting on each spring. a) 1200N b) 1500N c) 1800N d) 2000N

Last Answer : c) 1800N

Fresh grapes contains 80% of water by weight, where as dry grapes contains 50% of water by weight. Yamini buys 100kg of fresh grapes for a total price of Rs. 300. At what price should she sell the dry grapes (fresh grapes are dried up) to earn 80%profit?

Description : Fresh grapes contains 80% of water by weight, where as dry grapes contains 50% of water by weight. Yamini buys 100kg of fresh grapes for a total price of Rs. 300. At what price should she sell the dry grapes (fresh grapes are dried up) to earn 80%profit?

Last Answer :  In fresh grapes ratio of water to grapes is 80:20= 4:1 In dry grapes ratio is = 50:50 =1:1 Weight of grapes is = 100*[1/5]= 20kg Weight of dry grapes = 20*2 =40 kg Required amount is = 300*100[180/100]/40 = Rs. 1350

In case of laminar flow of fluid through a circular pipe, the (A) Shear stress over the cross-section is proportional to the distance from the surface of the pipe (B) Surface of velocity distribution is a paraboloid of revolution, whose volume equals half the volume of circumscribing cylinder (C) Velocity profile varies hyperbolically and the shear stress remains constant over the cross-section (D) Average flow occurs at a radial distance of 0.5 r from the centre of the pipe (r = pipe radius)

Description : In case of laminar flow of fluid through a circular pipe, the (A) Shear stress over the cross-section is proportional to the distance from the surface of the pipe (B) Surface of velocity distribution is a ... occurs at a radial distance of 0.5 r from the centre of the pipe (r = pipe radius)

Last Answer : (B) Surface of velocity distribution is a paraboloid of revolution, whose volume equals half the volume of circumscribing cylinder

A negligbly small current is passed through a wire of length 15 cm and uniform cross-section `6.0xx10^(-7) m^(2)` and its resistance is measured to be

Description : A negligbly small current is passed through a wire of length 15 cm and uniform cross-section `6.0xx10^(-7) m^(2)` and its resistance is measured to be

Last Answer : A negligbly small current is passed through a wire of length 15 cm and uniform cross-section ` ... the material at the temperature of the experiment ?

A wire of resistance `4 Omega` is stretched to twice its original length. In the process of stretching, its area of cross-section gets halved. Now, th

Description : A wire of resistance `4 Omega` is stretched to twice its original length. In the process of stretching, its area of cross-section gets halved. Now, th

Last Answer : A wire of resistance `4 Omega` is stretched to twice its original length. In the process of stretching, its area ... Omega` C. `1 Omega` D. `4 Omega`

A metal wire of circular cross-section has a resistance `R_(1)`. The wire is now stretched without breaking, so that its length is doubled and the den

Description : A metal wire of circular cross-section has a resistance `R_(1)`. The wire is now stretched without breaking, so that its length is doubled and the den

Last Answer : A metal wire of circular cross-section has a resistance `R_(1)`. The wire is now stretched without breaking, so that its ... 2` C. `4 : 1` D. `1 : 4`

Assertion : If a current is flowing through a conducting wire of non-uniform cross-section, drift speed and resistance both will increase at a section

Description : Assertion : If a current is flowing through a conducting wire of non-uniform cross-section, drift speed and resistance both will increase at a section

Last Answer : Assertion : If a current is flowing through a conducting wire of non-uniform cross-section, drift ... . If Assertion is false but Reason is true.

Assertion : If a current flows through a wire of non-uniform cross-section, potential difference per unit length of wire is same throughout the length

Description : Assertion : If a current flows through a wire of non-uniform cross-section, potential difference per unit length of wire is same throughout the length

Last Answer : Assertion : If a current flows through a wire of non-uniform cross-section, potential difference per ... . If Assertion is false but Reason is true.

A wire of uniform area of cross-section A length L and resistance R is cut into two parts. Resistivity of each part a. remains the same b. is doubled c. is halved d. becomes zero

Description : A wire of uniform area of cross-section A length L and resistance R is cut into two parts. Resistivity of each part a. remains the same b. is doubled c. is halved d. becomes zero

Last Answer : a. remains the same

When current of one ampere is flowing across any cross-section of wire in one second, then the quantity of charge is said to be: (a) One coulomb (b) Three coulomb (c) One micro-coulomb (d) None of above

Description : When current of one ampere is flowing across any cross-section of wire in one second, then the quantity of charge is said to be: (a) One coulomb (b) Three coulomb (c) One micro-coulomb (d) None of above

Last Answer : (a) One coulomb

Indicate the false statement about the resistance of a wire (1) it depends on material of wire (2) it is directly proportional to the length of wire (3) it is directly proportional to the area of cross-section of wire (4) resistance of metallic wire increases with increase in temperature

Description : Indicate the false statement about the resistance of a wire (1) it depends on material of wire (2) it is directly proportional to the length of wire (3) it is directly proportional to the area of cross-section of wire (4) resistance of metallic wire increases with increase in temperature

Last Answer :  it is directly proportional to the area of cross-section of wire

A wire of resistance R has it length and cross-section both doubled. Its resistance will become

Last Answer : A wire of resistance R has it length and cross-section both doubled. Its resistance will become R.

A compound bar consists of two bars of equal length. Steel bar cross-section is 3500 mm2 and that of brass bar is 3000 mm2 . These are subjected to a compressive load 100,000 N. If Eb = 0.2 MN/mm2 and Eb = 0.1 MN/mm2 , the stresses developed are: (A) b = 10 N/mm2s = 20 N/mm2(B) b = 8 N/mm2s = 16 N/mm2(C) b = 6 N/mm2s = 12 N/mm2(D) b = 5 N/mm2s = 10 N/mm

Description : A compound bar consists of two bars of equal length. Steel bar cross-section is 3500 mm2 and that  of brass bar is 3000 mm2 . These are subjected to a compressive load 100,000 N. If Eb = 0.2  MN/mm2  and Eb = 0.1 ... 6 N/mm2 s  = 12 N/mm2 (D) b = 5 N/mm2 s  = 10 N/mm

Last Answer : (A) b = 10 N/mm2 s  = 20 N/mm

The length of a column, having a uniform circular cross-section of 7.5 cm diameter and whose ends are hinged, is 5 m. If the value of E for the material is 2100 tonnes/cm2 , the permissible maximum crippling load will be (A) 1.288 tonnes (B) 12.88 (C) 128.8 tonnes (D) 288.0

Description : The length of a column, having a uniform circular cross-section of 7.5 cm diameter and whose ends are hinged, is 5 m. If the value of E for the material is 2100 tonnes/cm2 , the permissible maximum crippling load will be (A) 1.288 tonnes (B) 12.88 (C) 128.8 tonnes (D) 288.0

Last Answer : (B) 12.88

The length of a column, having a uniform circular cross-section of 7.5 cm diameter and whose endsare hinged, is 5 m. If the value of E for the material is 2100 tonnes/cm2, the permissible maximumcrippling load will be (a) 1.288 tonnes (b) 12.88 (c) 128.8 tonnes (d) 288.0

Description : The length of a column, having a uniform circular cross-section of 7.5 cm diameter and whose endsare hinged, is 5 m. If the value of E for the material is 2100 tonnes/cm2, the permissible maximumcrippling load will be (a) 1.288 tonnes (b) 12.88 (c) 128.8 tonnes (d) 288.0

Last Answer : (b) 12.88

The section modulus of a rectangular light beam 25 metres long is 12.500 cm3 . The beam is simply supported at its ends and carries a longitudinal axial tensile load of 10 tonnes in addition to a point load of 4 tonnes at the centre. The maximum stress in the bottom most fibre at the mid span section, is (A) 13.33 kg/cm2 tensile (B) 13.33 kg/cm2 compressive (C) 26.67 kg/cm2 tensile (D) 26.67 kg/cm2 compressive

Description : The section modulus of a rectangular light beam 25 metres long is 12.500 cm3 . The beam is simply supported at its ends and carries a longitudinal axial tensile load of 10 tonnes in addition to a point load of ... 13.33 kg/cm2 compressive (C) 26.67 kg/cm2 tensile (D) 26.67 kg/cm2 compressive

Last Answer : (C) 26.67 kg/cm2 tensile

A steel rod 1 metre long having square cross section is pulled under a tensile load of 8 tonnes. The extension in the rod was 1 mm only. If Esteel = 2 × 106 kg/cm2 , the side of the rod, is (A) 1 cm (B) 1.5 cm (C) 2 cm (D) 2.5 cm

Description : A steel rod 1 metre long having square cross section is pulled under a tensile load of 8 tonnes. The  extension in the rod was 1 mm only. If Esteel = 2 × 106  kg/cm2 , the side of the rod, is  (A) 1 cm  (B) 1.5 cm  (C) 2 cm  (D) 2.5 cm 

Last Answer : (C) 2 cm 

A bar L metre long and having its area of cross-section A, is subjected to a gradually applied tensile load W. The strain energy stored in the bar is (A) WL/2AE (B) WL/AE (C) W²L/AE (D) W²L/2AE

Description : A bar L metre long and having its area of cross-section A, is subjected to a gradually applied tensile  load W. The strain energy stored in the bar is  (A) WL/2AE (B) WL/AE (C) W²L/AE (D) W²L/2AE

Last Answer : (D) W²L/2AE

Pick out the wrong statement. (A) The equivalent stiffness of two springs (of equal stiffness 'S') in series is S/2 while in parallel is 2S (B) For a helical spring, deflection is proportional to D3(D = mean coil diameter) or d4(d = wire diameter) (C) Crushing load or columns is less than the buckling load (D) Modulus of resilience is proportional to (stress at elastic limit)2

Description : Pick out the wrong statement. (A) The equivalent stiffness of two springs (of equal stiffness 'S') in series is S/2 while in parallel is 2S (B) For a helical spring, deflection is ... is less than the buckling load (D) Modulus of resilience is proportional to (stress at elastic limit)2

Last Answer : (C) Crushing load or columns is less than the buckling load

Determine the maximum shearing stress and elongation in a helical steel spring composed of 20 turns of 20-mm-diameter wire on a mean radius of 90 mm when the spring is supporting a load of 1.5 kN. and G = 83 GPa. a. 200 mm b. 105.4 mm c. 150 mm d. 250 mm

Description : Determine the maximum shearing stress and elongation in a helical steel spring composed of 20 turns of 20-mm-diameter wire on a mean radius of 90 mm when the spring is supporting a load of 1.5 kN. and G = 83 GPa. a. 200 mm b. 105.4 mm c. 150 mm d. 250 mm

Last Answer : b. 105.4 mm

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

Explain stress-strain diagram for a wire under continuously increasing load.

Description : Explain stress-strain diagram for a wire under continuously increasing load.

Last Answer : A graph or diagram of stress and strain is shown as above.  OE Portion is straight line which indicates that stress is proportional to strain. Therefore the wire obeys Hooke's law upto the point ... point D is ultimate stress point. It is the max. stress the wire is capable of with standing.

Stress Concentration Factor is the ratio of nominal stress obtained by elementary equations for minimum cross- section and highest value of actual stress near discontinuity. a) True b) False

Description : Stress Concentration Factor is the ratio of nominal stress obtained by elementary equations for minimum cross- section and highest value of actual stress near discontinuity. a) True b) False

Last Answer : b) False

Stress concentration is defined as the localization of high stresses due to irregularities present in the component and no changes of the cross section. a) True b) False

Description : Stress concentration is defined as the localization of high stresses due to irregularities present in the component and no changes of the cross section. a) True b) False

Last Answer : b) False

Shear stress in a fluid flowing in a round pipe (A) Varies parabolically across the cross-section(B) Remains constant over the cross-section(C) Is zero at the centre and varies linearly with the radius(D) Is zero at the wall and increases linearly to the centre

Description : Shear stress in a fluid flowing in a round pipe (A) Varies parabolically across the cross-section (B) Remains constant over the cross-section (C) Is zero at the centre and varies linearly with the radius (D) Is zero at the wall and increases linearly to the centre

Last Answer : (C) Is zero at the centre and varies linearly with the radius

Pick out the wrong statement. (A) The form drag is dependent upon the occurrence of a wake (B) The shear stress at any given cross-section of a pipe for steady flow (either laminar or turbulent) varies linearly as the radial distance (C) An ideal fluid is the one, which has negligible surface tension and obeys the Newton's law of viscosity (D) Existence of the boundary layer in fluid flow is because of viscosity of the fluid

Description : Pick out the wrong statement. (A) The form drag is dependent upon the occurrence of a wake (B) The shear stress at any given cross-section of a pipe for steady flow (either laminar or turbulent ... of viscosity (D) Existence of the boundary layer in fluid flow is because of viscosity of the fluid

Last Answer : (C) An ideal fluid is the one, which has negligible surface tension and obeys the Newton's law of viscosity

A lift of weight W is lifted by a rope with an acceleration f. If the area of cross-section of the rope is A, the stress in the rope is (A) [W (1 + f/G)]/A (B) (1 - g/f)/A (C) [W (2 + f/G)]/A (D) [W (2 + g/f)]/A

Description : A lift of weight W is lifted by a rope with an acceleration f. If the area of cross-section of the rope  is A, the stress in the rope is  (A) [W (1 + f/G)]/A (B) (1 - g/f)/A (C) [W (2 + f/G)]/A (D) [W (2 + g/f)]/A

Last Answer : (A) [W (1 + f/G)]/A

The yield moment of a cross section is defined as the moment that will just produce the yield stress in (A) The outer most fibre of the section (B) The inner most fibre of the section (C) The neutral fibre of the section (D) The fibre everywhere

Description : The yield moment of a cross section is defined as the moment that will just produce the yield  stress in  (A) The outer most fibre of the section  (B) The inner most fibre of the section  (C) The neutral fibre of the section  (D) The fibre everywhere 

Last Answer : (A) The outer most fibre of the section 

If the stress in each cross-section of a pillar is equal to its working stress, it is called (A) Body of equal (B) Body of equal section (C) Body of equal strength (D) None of these

Description : If the stress in each cross-section of a pillar is equal to its working stress, it is called (A) Body of equal (B) Body of equal section (C) Body of equal strength (D) None of these

Last Answer : (C) Body of equal strength

When a rectangular beam is loaded transversely, the maximum compressive stress develops on (A) Bottom fibre (B) Top fibre (C) Neutral axis (D) Every cross-section

Description : When a rectangular beam is loaded transversely, the maximum compressive stress develops on (A) Bottom fibre (B) Top fibre (C) Neutral axis (D) Every cross-section

Last Answer : (B) Top fibre