Deemed University 2010 B.Tech Mechanical Engineering University: Lingayas University Term: III Title of the : Strength of Material - I - Question Paper
Roll No. ..
Lingayas University, Faridabad
Examination May, 2010
Course: B.Tech. Year: IInd
Semester: III Paper Code: ME-203E
Subject: Strength of Material - I
[Time: 3 Hours] [Max. Marks: 100]
Before answering the question, candidate should ensure that they have been supplied the correct and complete question paper. No complaint in this regard, will be entertained after examination.
Note: Attempt any five questions. Assume suitable missing data, if any
Q-1. (a) Define the term modulus of rigidity, poissons Ratio, youngs modulus and Bulk modulus. (8)
(b) A load of 270 KN is applied on a short concrete column 250 mm x 250 mm. The column is reinforced with 8 steel bars of 16mm diameter. If the modulus of elasticity for steel is 18 times that of concrete find the stresses in concrete and steel. If the stress in concrete shall not exceed 4N/mm2, find the area of steel required so that the column may support a load of 400 KN. (12)
Q-2. The stresses at a point in a bar are 200 N/mm2 (tensile) and 100 N/mm2 (compressive). Determine the resultant stress in magnitude and direction on plane inclined at 60o to the axis of major stress. Also determine the maximum intensity of shear stress in the material at this point by MOHRS circle method. (20)
Q3. Draw the Bending moment and shear force diagrams for the overhanging Beam shown in Figure. Also locate point of contra flexure. (20)
Q-4. A cost iron Beam of T Section as shown in figure id simply supported on a span of 8 meter. The Beam carries a uniformly distributed load of 1.5 KN/m length on the entire span. Determine the maximum tensile and maximum compressive stresses. (20)
Q-5. A solid cylindrical shaft is to transmit 300 kw power at 100 rpm. (20)
(a) If the shear stress not to exceed 80N/mm2. Find its diameter.
(b) What percent saving in weight could be obtained if this shaft is replaced by a hollow one whose internal diameter equal to 0.6 of external diameter, the length material and maximum shear stress being the same?
Q-6. Determine (i) Slope at the left support (ii) Deflection under the load and (iii) maximum deflection of a simply supported Beam of length 5 meter which is carrying a point load of 5 KN at a distance of 3m from the left end. Take E = 2x105 N/mm2 and I = 1x108 mm4. (20)
Q-7. A simply supported Beam of length 4 m is subjected to a uniformly distributed load of 30 KN/m over the whole span and deflects 15 mm at the centre. Determine the crippling loads when this beam is used as a column with the following conditions (20)
(i) one end fixed and other hinged
(ii) Both the ends pin jointed.
Q-8. Find an expression for deflection of a fixed Beam carrying a point load at the centre. Also obtain the value of maximum deflection. (20)
Roll No. ..
Lingayas University, Faridabad
Examination December, 2009
Course: B.Tech. Year: IInd
Semester: III Paper Code: ME-203E
Subject: Strength of Material - I
[Time: 3 Hours] [Max. Marks: 100]
Before answering the question, candidate should ensure that they have been supplied the correct and complete question paper. No complaint in this regard, will be entertained after examination.
Note: Attempt any five questions. Assume suitable missing data, if any
Q-1. (a) Define the term modulus of rigidity, poissons Ratio, youngs modulus and Bulk modulus. (8)
(b) A load of 270 KN is applied on a short concrete column 250 mm x 250 mm. The column is reinforced with 8 steel bars of 16mm diameter. If the modulus of elasticity for steel is 18 times that of concrete find the stresses in concrete and steel. If the stress in concrete shall not exceed 4N/mm2, find the area of steel required so that the column may support a load of 400 KN. (12)
Q-2. The stresses at a point in a bar are 200 N/mm2 (tensile) and 100 N/mm2 (compressive). Determine the resultant stress in magnitude and direction on plane inclined at 60o to the axis of major stress. Also determine the maximum intensity of shear stress in the material at this point by MOHRS circle method. (20)
Q3. Draw the Bending moment and shear force diagrams for the overhanging Beam shown in Figure. Also locate point of contra flexure. (20)
Q-4. A cost iron Beam of T Section as shown in figure id simply supported on a span of 8 meter. The Beam carries a uniformly distributed load of 1.5 KN/m length on the entire span. Determine the maximum tensile and maximum compressive stresses. (20)
Q-5. A solid cylindrical shaft is to transmit 300 kw power at 100 rpm. (20)
(a) If the shear stress not to exceed 80N/mm2. Find its diameter.
(b) What percent saving in weight could be obtained if this shaft is replaced by a hollow one whose internal diameter equal to 0.6 of external diameter, the length material and maximum shear stress being the same?
Q-6. Determine (i) Slope at the left support (ii) Deflection under the load and (iii) maximum deflection of a simply supported Beam of length 5 meter which is carrying a point load of 5 KN at a distance of 3m from the left end. Take E = 2x105 N/mm2 and I = 1x108 mm4. (20)
Q-7. A simply supported Beam of length 4 m is subjected to a uniformly distributed load of 30 KN/m over the whole span and deflects 15 mm at the centre. Determine the crippling loads when this beam is used as a column with the following conditions (20)
(i) one end fixed and other hinged
(ii) Both the ends pin jointed.
Q-8. Find an expression for deflection of a fixed Beam carrying a point load at the centre. Also obtain the value of maximum deflection. (20)
| Earning: Approval pending. |
