Page 1 Topic Questi on No. Question Option A Option B Option C Option D Answer Key Engineering Mechanics and Strength of Materials / Concepts of stress and strain 1 The term deformation per unit length is applied for Stress Strain Modulus of elasticity Modulus of Rigidity B Engineering Mechanics and Strength of Materials / Concepts of stress and strain 2 In a universal testing machine during the testing of a specimen of original cross - sectional area 1 cm² the maximum load applied was 7.5 tonnes and neck area 0.6 sq.cm the ultimate tensile strength of the specimen is 4.6. tonnes/cm² 7.5 tonnes/cm² 12.5 tonnes/cm² 18.75 tonnes/cm² C Engineering Mechanics and Strength of Materials / Concepts of stress and strain 3 The elongation produced in a rod by its own weight, of length (l) and diameter (d) rigidly fixed at the upper end and hanging is equal to: - ( where w = weight per unit volume of the rod and E = modulus of elasticity ) wl/2E wl²/2E wl³/2E wl 4 /2E Engineering Mechanics and Strength of Materials / Elastic limit and elastic constants 4 The bulk modulus of the body is equal to m E/ 3 (m - 2) m E/ 3 (m + 2) m E/ 2 (m - 2) m E/ 2 (m + 2) A Engineering Mechanics and Strength of Materials / Elastic limit and elastic constants 5 An alloy specimen has a modulus of elasticity of 120 GPa and modulus of rigidity of 45 GPa. The 3-Jan 2-Jan 4-Jan 5-Jan Not proper Answer Page 2 Topic Questi on No. Question Option A Option B Option C Option D Answer Key Engineering Mechanics and Strength of Materials / Concepts of stress and strain 1 The term deformation per unit length is applied for Stress Strain Modulus of elasticity Modulus of Rigidity B Engineering Mechanics and Strength of Materials / Concepts of stress and strain 2 In a universal testing machine during the testing of a specimen of original cross - sectional area 1 cm² the maximum load applied was 7.5 tonnes and neck area 0.6 sq.cm the ultimate tensile strength of the specimen is 4.6. tonnes/cm² 7.5 tonnes/cm² 12.5 tonnes/cm² 18.75 tonnes/cm² C Engineering Mechanics and Strength of Materials / Concepts of stress and strain 3 The elongation produced in a rod by its own weight, of length (l) and diameter (d) rigidly fixed at the upper end and hanging is equal to: - ( where w = weight per unit volume of the rod and E = modulus of elasticity ) wl/2E wl²/2E wl³/2E wl 4 /2E Engineering Mechanics and Strength of Materials / Elastic limit and elastic constants 4 The bulk modulus of the body is equal to m E/ 3 (m - 2) m E/ 3 (m + 2) m E/ 2 (m - 2) m E/ 2 (m + 2) A Engineering Mechanics and Strength of Materials / Elastic limit and elastic constants 5 An alloy specimen has a modulus of elasticity of 120 GPa and modulus of rigidity of 45 GPa. The 3-Jan 2-Jan 4-Jan 5-Jan Not proper Answer Poisson's ratio of the material is. Engineering Mechanics and Strength of Materials / Thin walled pressure vessels 6 In case of thin cylinder, which one is a correct statement The hoop stress in a thin cylinderical shell is compressive stress. The ratio of hoop stress to longitudinal stress for a thin cylindrical shell is 1/2 The shear stress in a thin spherical shell is more than that of in a thin cylindrical shell. The design of thin cylindrical shell is based upon hoop stress B Engineering Mechanics and Strength of Materials / Thin walled pressure vessels 7 The longitudinal strain in case of thin cylinder shell, when subjected to internal pressure (p), is equal to ( pd/2tE) ( 1/2 - 1/m ) ( pd/2tE) (1 - 1/2m ) ( pd/4tE) (1 - 1/m ) ( 3pd/4tE) ( 1 - 1/m ) A Engineering Mechanics and Strength of Materials / Stress in composite barsm, Torsion of circular shafts 8 Polar moment of inertia of a solid circular shaft of diameter D is equal to pD³/32 pD 4 /32 pD³/64 pD 4 /64 D Engineering Mechanics and Strength of Materials / Stress in composite barsm, Torsion of circular shafts 9 A steel rod of 3 cm of diameter is enclosed centrally in a hollow copper tube of external diameter 5 cm and internal diameter of 4 cm. The composite bar is then subjected to an axial pull of 45000 N. If the length of each bar is equal to 15 cm , E for steel = 2.1 X 105 N/mm2 and for copper is = 1.1 X105 N/mm2 ,the stress in tube is 21.88 N/mm² 41.77 N/mm² 31. 88 N/mm² 51.77 N/mm² Engineering Mechanics and Strength of Materials / Bending moments and shear force 10 A simply supported beam of length L carrying a load concentrated at the centre of wL wL/ 4 wL/2 wL/8 B Page 3 Topic Questi on No. Question Option A Option B Option C Option D Answer Key Engineering Mechanics and Strength of Materials / Concepts of stress and strain 1 The term deformation per unit length is applied for Stress Strain Modulus of elasticity Modulus of Rigidity B Engineering Mechanics and Strength of Materials / Concepts of stress and strain 2 In a universal testing machine during the testing of a specimen of original cross - sectional area 1 cm² the maximum load applied was 7.5 tonnes and neck area 0.6 sq.cm the ultimate tensile strength of the specimen is 4.6. tonnes/cm² 7.5 tonnes/cm² 12.5 tonnes/cm² 18.75 tonnes/cm² C Engineering Mechanics and Strength of Materials / Concepts of stress and strain 3 The elongation produced in a rod by its own weight, of length (l) and diameter (d) rigidly fixed at the upper end and hanging is equal to: - ( where w = weight per unit volume of the rod and E = modulus of elasticity ) wl/2E wl²/2E wl³/2E wl 4 /2E Engineering Mechanics and Strength of Materials / Elastic limit and elastic constants 4 The bulk modulus of the body is equal to m E/ 3 (m - 2) m E/ 3 (m + 2) m E/ 2 (m - 2) m E/ 2 (m + 2) A Engineering Mechanics and Strength of Materials / Elastic limit and elastic constants 5 An alloy specimen has a modulus of elasticity of 120 GPa and modulus of rigidity of 45 GPa. The 3-Jan 2-Jan 4-Jan 5-Jan Not proper Answer Poisson's ratio of the material is. Engineering Mechanics and Strength of Materials / Thin walled pressure vessels 6 In case of thin cylinder, which one is a correct statement The hoop stress in a thin cylinderical shell is compressive stress. The ratio of hoop stress to longitudinal stress for a thin cylindrical shell is 1/2 The shear stress in a thin spherical shell is more than that of in a thin cylindrical shell. The design of thin cylindrical shell is based upon hoop stress B Engineering Mechanics and Strength of Materials / Thin walled pressure vessels 7 The longitudinal strain in case of thin cylinder shell, when subjected to internal pressure (p), is equal to ( pd/2tE) ( 1/2 - 1/m ) ( pd/2tE) (1 - 1/2m ) ( pd/4tE) (1 - 1/m ) ( 3pd/4tE) ( 1 - 1/m ) A Engineering Mechanics and Strength of Materials / Stress in composite barsm, Torsion of circular shafts 8 Polar moment of inertia of a solid circular shaft of diameter D is equal to pD³/32 pD 4 /32 pD³/64 pD 4 /64 D Engineering Mechanics and Strength of Materials / Stress in composite barsm, Torsion of circular shafts 9 A steel rod of 3 cm of diameter is enclosed centrally in a hollow copper tube of external diameter 5 cm and internal diameter of 4 cm. The composite bar is then subjected to an axial pull of 45000 N. If the length of each bar is equal to 15 cm , E for steel = 2.1 X 105 N/mm2 and for copper is = 1.1 X105 N/mm2 ,the stress in tube is 21.88 N/mm² 41.77 N/mm² 31. 88 N/mm² 51.77 N/mm² Engineering Mechanics and Strength of Materials / Bending moments and shear force 10 A simply supported beam of length L carrying a load concentrated at the centre of wL wL/ 4 wL/2 wL/8 B diagram span will have maximum bending moment of Engineering Mechanics and Strength of Materials / Bending moments and shear force diagram 11 A beam of uniform strength is one which has same Bending stress at every section Deflection throughout the beam Bending moment throughout the beam Shear force throughout the beam C Engineering Mechanics and Strength of Materials / Bending moments and shear force diagram 12 A simply supported beam a uniformly distributed load of w N per unit length over the whole span (l). The point of contraflexure is at The suppoted end The middle of the beam No point of contraflexture A distance (l/4) from the supported end C Engineering Mechanics and Strength of Materials / Equilibrium of Forces 13 If a number of forces are acting at a point, their resultant will be inclined at an angle ? with the horizontal, such that tan ? = ?V/?H tan ? = ?Vx?H tan ? = ?Hx?V tan ? = ?H/?V A Engineering Mechanics and Strength of Materials / Equilibrium of Forces 14 If two forces of magnitude 'P' act at an angle '?' there resultant will be 2P Cos? P Cos2? P Cos? Sin? 2P Cos?/2 A Engineering Mechanics and Strength of Materials / Equilibrium of Forces 15 Two forces which when acting at right angles produce resultant force of 10 and when acting at 60° produce resultant of v148. These forces are 3 and 4 6 and 8 5 and 5 4 and 6 B Engineering Mechanics and Strength of Materials / Law of motion, Friction 16 If the angle of friction is zero a body will experience Infinite friction Zero Friction The force of friction will act normal to the plane The force of friction will act in the direction of motion B Engineering Mechanics and Strength 17 The least force to drag a body of 600N along 200v3 N 450 N 300 N 250 N A Page 4 Topic Questi on No. Question Option A Option B Option C Option D Answer Key Engineering Mechanics and Strength of Materials / Concepts of stress and strain 1 The term deformation per unit length is applied for Stress Strain Modulus of elasticity Modulus of Rigidity B Engineering Mechanics and Strength of Materials / Concepts of stress and strain 2 In a universal testing machine during the testing of a specimen of original cross - sectional area 1 cm² the maximum load applied was 7.5 tonnes and neck area 0.6 sq.cm the ultimate tensile strength of the specimen is 4.6. tonnes/cm² 7.5 tonnes/cm² 12.5 tonnes/cm² 18.75 tonnes/cm² C Engineering Mechanics and Strength of Materials / Concepts of stress and strain 3 The elongation produced in a rod by its own weight, of length (l) and diameter (d) rigidly fixed at the upper end and hanging is equal to: - ( where w = weight per unit volume of the rod and E = modulus of elasticity ) wl/2E wl²/2E wl³/2E wl 4 /2E Engineering Mechanics and Strength of Materials / Elastic limit and elastic constants 4 The bulk modulus of the body is equal to m E/ 3 (m - 2) m E/ 3 (m + 2) m E/ 2 (m - 2) m E/ 2 (m + 2) A Engineering Mechanics and Strength of Materials / Elastic limit and elastic constants 5 An alloy specimen has a modulus of elasticity of 120 GPa and modulus of rigidity of 45 GPa. The 3-Jan 2-Jan 4-Jan 5-Jan Not proper Answer Poisson's ratio of the material is. Engineering Mechanics and Strength of Materials / Thin walled pressure vessels 6 In case of thin cylinder, which one is a correct statement The hoop stress in a thin cylinderical shell is compressive stress. The ratio of hoop stress to longitudinal stress for a thin cylindrical shell is 1/2 The shear stress in a thin spherical shell is more than that of in a thin cylindrical shell. The design of thin cylindrical shell is based upon hoop stress B Engineering Mechanics and Strength of Materials / Thin walled pressure vessels 7 The longitudinal strain in case of thin cylinder shell, when subjected to internal pressure (p), is equal to ( pd/2tE) ( 1/2 - 1/m ) ( pd/2tE) (1 - 1/2m ) ( pd/4tE) (1 - 1/m ) ( 3pd/4tE) ( 1 - 1/m ) A Engineering Mechanics and Strength of Materials / Stress in composite barsm, Torsion of circular shafts 8 Polar moment of inertia of a solid circular shaft of diameter D is equal to pD³/32 pD 4 /32 pD³/64 pD 4 /64 D Engineering Mechanics and Strength of Materials / Stress in composite barsm, Torsion of circular shafts 9 A steel rod of 3 cm of diameter is enclosed centrally in a hollow copper tube of external diameter 5 cm and internal diameter of 4 cm. The composite bar is then subjected to an axial pull of 45000 N. If the length of each bar is equal to 15 cm , E for steel = 2.1 X 105 N/mm2 and for copper is = 1.1 X105 N/mm2 ,the stress in tube is 21.88 N/mm² 41.77 N/mm² 31. 88 N/mm² 51.77 N/mm² Engineering Mechanics and Strength of Materials / Bending moments and shear force 10 A simply supported beam of length L carrying a load concentrated at the centre of wL wL/ 4 wL/2 wL/8 B diagram span will have maximum bending moment of Engineering Mechanics and Strength of Materials / Bending moments and shear force diagram 11 A beam of uniform strength is one which has same Bending stress at every section Deflection throughout the beam Bending moment throughout the beam Shear force throughout the beam C Engineering Mechanics and Strength of Materials / Bending moments and shear force diagram 12 A simply supported beam a uniformly distributed load of w N per unit length over the whole span (l). The point of contraflexure is at The suppoted end The middle of the beam No point of contraflexture A distance (l/4) from the supported end C Engineering Mechanics and Strength of Materials / Equilibrium of Forces 13 If a number of forces are acting at a point, their resultant will be inclined at an angle ? with the horizontal, such that tan ? = ?V/?H tan ? = ?Vx?H tan ? = ?Hx?V tan ? = ?H/?V A Engineering Mechanics and Strength of Materials / Equilibrium of Forces 14 If two forces of magnitude 'P' act at an angle '?' there resultant will be 2P Cos? P Cos2? P Cos? Sin? 2P Cos?/2 A Engineering Mechanics and Strength of Materials / Equilibrium of Forces 15 Two forces which when acting at right angles produce resultant force of 10 and when acting at 60° produce resultant of v148. These forces are 3 and 4 6 and 8 5 and 5 4 and 6 B Engineering Mechanics and Strength of Materials / Law of motion, Friction 16 If the angle of friction is zero a body will experience Infinite friction Zero Friction The force of friction will act normal to the plane The force of friction will act in the direction of motion B Engineering Mechanics and Strength 17 The least force to drag a body of 600N along 200v3 N 450 N 300 N 250 N A of Materials / Law of motion, Friction a rough horizontal plane (angle of friction=30deg) is Engineering Mechanics and Strength of Materials / Buckling of columns- Euler’s and Rankin’s theories 18 A loaded column having the tendency to deflect. On account of this tendency, the critical load Decreases with the decrease in length Decreases with the increase in length First decreases then increases with the decrease in length First increases then decreases with the decrease in length C Engineering Mechanics and Strength of Materials / Buckling of columns- Euler’s and Rankin’s theories 19 The ratio of crippling load for a column of length 'l' with both ends fixed to the crippling load of the same column with both ends hinged, is equal to 2 4 0.25 0.5 B Engineering Mechanics and Strength of Materials / Buckling of columns- Euler’s and Rankin’s theories 20 A solid round circular bar 3 m long and 5 cm in diameter is used as a strut with both ends hinged having E=2x105 N/mm2. The crippling load is 67.28 KN 134.56 KN 269.12 KN 16.82 KN 2nd Law of Thermodynam ics / Definition of Sink 21 What is heat sink in thermodynami cs? Device to absorb heat Device to absorb mass Device from which heat is transferred Device from which mass is transferred B 2nd Law of Thermodynam ics / Definition of Sink 22 Sadi Carnot, proposed a reversible cyclein in 1824, in a Carnot Cycle the working medium receives heat at which of the following? No temperature required Lower temperature Higher temperature Constant temperature A 2nd Law of Thermodynam ics / Definition of Sink 23 A heat engine works on a Carnot cycle with a heat sink at a temperature of 27°C. What would be the temperature of 30°C 60°C 90°C 100°C A Page 5 Topic Questi on No. Question Option A Option B Option C Option D Answer Key Engineering Mechanics and Strength of Materials / Concepts of stress and strain 1 The term deformation per unit length is applied for Stress Strain Modulus of elasticity Modulus of Rigidity B Engineering Mechanics and Strength of Materials / Concepts of stress and strain 2 In a universal testing machine during the testing of a specimen of original cross - sectional area 1 cm² the maximum load applied was 7.5 tonnes and neck area 0.6 sq.cm the ultimate tensile strength of the specimen is 4.6. tonnes/cm² 7.5 tonnes/cm² 12.5 tonnes/cm² 18.75 tonnes/cm² C Engineering Mechanics and Strength of Materials / Concepts of stress and strain 3 The elongation produced in a rod by its own weight, of length (l) and diameter (d) rigidly fixed at the upper end and hanging is equal to: - ( where w = weight per unit volume of the rod and E = modulus of elasticity ) wl/2E wl²/2E wl³/2E wl 4 /2E Engineering Mechanics and Strength of Materials / Elastic limit and elastic constants 4 The bulk modulus of the body is equal to m E/ 3 (m - 2) m E/ 3 (m + 2) m E/ 2 (m - 2) m E/ 2 (m + 2) A Engineering Mechanics and Strength of Materials / Elastic limit and elastic constants 5 An alloy specimen has a modulus of elasticity of 120 GPa and modulus of rigidity of 45 GPa. The 3-Jan 2-Jan 4-Jan 5-Jan Not proper Answer Poisson's ratio of the material is. Engineering Mechanics and Strength of Materials / Thin walled pressure vessels 6 In case of thin cylinder, which one is a correct statement The hoop stress in a thin cylinderical shell is compressive stress. The ratio of hoop stress to longitudinal stress for a thin cylindrical shell is 1/2 The shear stress in a thin spherical shell is more than that of in a thin cylindrical shell. The design of thin cylindrical shell is based upon hoop stress B Engineering Mechanics and Strength of Materials / Thin walled pressure vessels 7 The longitudinal strain in case of thin cylinder shell, when subjected to internal pressure (p), is equal to ( pd/2tE) ( 1/2 - 1/m ) ( pd/2tE) (1 - 1/2m ) ( pd/4tE) (1 - 1/m ) ( 3pd/4tE) ( 1 - 1/m ) A Engineering Mechanics and Strength of Materials / Stress in composite barsm, Torsion of circular shafts 8 Polar moment of inertia of a solid circular shaft of diameter D is equal to pD³/32 pD 4 /32 pD³/64 pD 4 /64 D Engineering Mechanics and Strength of Materials / Stress in composite barsm, Torsion of circular shafts 9 A steel rod of 3 cm of diameter is enclosed centrally in a hollow copper tube of external diameter 5 cm and internal diameter of 4 cm. The composite bar is then subjected to an axial pull of 45000 N. If the length of each bar is equal to 15 cm , E for steel = 2.1 X 105 N/mm2 and for copper is = 1.1 X105 N/mm2 ,the stress in tube is 21.88 N/mm² 41.77 N/mm² 31. 88 N/mm² 51.77 N/mm² Engineering Mechanics and Strength of Materials / Bending moments and shear force 10 A simply supported beam of length L carrying a load concentrated at the centre of wL wL/ 4 wL/2 wL/8 B diagram span will have maximum bending moment of Engineering Mechanics and Strength of Materials / Bending moments and shear force diagram 11 A beam of uniform strength is one which has same Bending stress at every section Deflection throughout the beam Bending moment throughout the beam Shear force throughout the beam C Engineering Mechanics and Strength of Materials / Bending moments and shear force diagram 12 A simply supported beam a uniformly distributed load of w N per unit length over the whole span (l). The point of contraflexure is at The suppoted end The middle of the beam No point of contraflexture A distance (l/4) from the supported end C Engineering Mechanics and Strength of Materials / Equilibrium of Forces 13 If a number of forces are acting at a point, their resultant will be inclined at an angle ? with the horizontal, such that tan ? = ?V/?H tan ? = ?Vx?H tan ? = ?Hx?V tan ? = ?H/?V A Engineering Mechanics and Strength of Materials / Equilibrium of Forces 14 If two forces of magnitude 'P' act at an angle '?' there resultant will be 2P Cos? P Cos2? P Cos? Sin? 2P Cos?/2 A Engineering Mechanics and Strength of Materials / Equilibrium of Forces 15 Two forces which when acting at right angles produce resultant force of 10 and when acting at 60° produce resultant of v148. These forces are 3 and 4 6 and 8 5 and 5 4 and 6 B Engineering Mechanics and Strength of Materials / Law of motion, Friction 16 If the angle of friction is zero a body will experience Infinite friction Zero Friction The force of friction will act normal to the plane The force of friction will act in the direction of motion B Engineering Mechanics and Strength 17 The least force to drag a body of 600N along 200v3 N 450 N 300 N 250 N A of Materials / Law of motion, Friction a rough horizontal plane (angle of friction=30deg) is Engineering Mechanics and Strength of Materials / Buckling of columns- Euler’s and Rankin’s theories 18 A loaded column having the tendency to deflect. On account of this tendency, the critical load Decreases with the decrease in length Decreases with the increase in length First decreases then increases with the decrease in length First increases then decreases with the decrease in length C Engineering Mechanics and Strength of Materials / Buckling of columns- Euler’s and Rankin’s theories 19 The ratio of crippling load for a column of length 'l' with both ends fixed to the crippling load of the same column with both ends hinged, is equal to 2 4 0.25 0.5 B Engineering Mechanics and Strength of Materials / Buckling of columns- Euler’s and Rankin’s theories 20 A solid round circular bar 3 m long and 5 cm in diameter is used as a strut with both ends hinged having E=2x105 N/mm2. The crippling load is 67.28 KN 134.56 KN 269.12 KN 16.82 KN 2nd Law of Thermodynam ics / Definition of Sink 21 What is heat sink in thermodynami cs? Device to absorb heat Device to absorb mass Device from which heat is transferred Device from which mass is transferred B 2nd Law of Thermodynam ics / Definition of Sink 22 Sadi Carnot, proposed a reversible cyclein in 1824, in a Carnot Cycle the working medium receives heat at which of the following? No temperature required Lower temperature Higher temperature Constant temperature A 2nd Law of Thermodynam ics / Definition of Sink 23 A heat engine works on a Carnot cycle with a heat sink at a temperature of 27°C. What would be the temperature of 30°C 60°C 90°C 100°C A the heat at source if efficiency of the engine is 10%? 2nd Law of Thermodynam ics / Source Reservoir of Heat, Heat Engine, Heat pump and Refrigerator 24 What do you mean by antifreeze chemicals? Substance that increases freezing point of water Substance that lowers the freezing point of water Substance that will not effect the freezing point of water Substance that evaporates the water B 2nd Law of Thermodynam ics / Source Reservoir of Heat, Heat Engine, Heat pump and Refrigerator 25 An Electrolux refrigerator is called as Single-fluid absorption system Three-fluid absorption system Two-fluid absorption system No fluid absorption system B 2nd Law of Thermodynam ics / Thermal efficiency of heat engines and co- efficient of performance of Refrigerators 26 Which of the following device controls the flow of refrigerant in a refrigeration cycle? Condenser Compressor Evaporator Expansion valve D 2nd Law of Thermodynam ics / Thermal efficiency of heat engines and co- efficient of performance of Refrigerators 27 Isothermal efficiency is defined by which of the following in reciprocating compressor Isothermal work / Actual indicated work Adiabatic work / indicated work Isothermal work / Adiabatic work Adiabatic work / Frictionless work A 2nd Law of Thermodynam ics / Thermal efficiency of heat engines and co- efficient of performance of Refrigerators 28 What will be COP of heat pump if Q1 is the heat transfer between hot temperature source machine and Q2 between cold temperature source machine? Q1/Q1-Q2 Q2/Q2-Q1 Q1/Q2-Q1 Q2/Q1-Q2 A 2nd Law of Thermodynam ics / Kelvin– Plank & Clausius 29 Kelvin Planck’s law deals with which of the following? Conservation of energy into mass Conservation of mass into energy Conversion of heat into work Conversion of work into heat C 2nd Law of 30 Which of the A machine A machine A machine A machine ARead More

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