SHRI RAMSWAROOP MEMORIAL COLLEGE OF ENGG. & MANAGEMENT
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1 Time: 1 Hour B.Tech. [SEM V (ME)] QUIZ TEST-1 MACHINE DESIGN-1 Note: Attempt all questions. Q1) Why is the necessity of having more than one theories of failure? Explain various theories of failure. [QNO.1] [2+3] Q2) A hollow shaft is required to transmit 600 kw at 110 r.p.m., the maximum torque being 20% greater than the mean. The shear stress is not to exceed 63 MPa and twist in a length of 3 meters not to exceed 1.4 degrees. Find the external diameter of the shaft, if the internal diameter to the external diameter is 3/8. Take modulus of rigidity as 84 GPa. [QNO. 11] [5] Q1) Why factor of safety is necessary in design of mechanical component? Discuss the important factors influencing the selection of factor of safety. [3+3] Q2) The dimensions of an overhang crank are given in fig. the force P acting at the crankpin is 1 KN.the crank is made of steel 30C8(S yt =400N/mm 2 ) and factor of safety=2. Using maximum shear stress theory, determine diameter at section XX. [7] Q3) A hanger is shown in fig. is subjected to a pull of 10kN, acting at an angel of 30 to vertical. The bracket has a rectangular section whose depth is two times its thickness. If the permissible tensile stress is 60kN/mm 2, determine the cross-section of the bracket. [7] EME-501/Mr. Ajay Kumar, Ms. Chitra Bajpai
2 EME-501/Mr. Ajay Kumar, Ms. Chitra Bajpai
3 Time: 1 Hour B.Tech. [SEM V (ME)] QUIZ TEST-1 MACHINE DESIGN-1 Note: Attempt all questions. Q1) What are the reasons for the use of alloy steels in machine design parts? How do you classified materials for engineering use? [QNO.4] [2+3] Q2) A cylindrical shaft made of steel of yield strength 700 MPa is subjected to a static loads consisting of bending moment of 10 KN m and a torsional moment of 30 KN-m.Determine the diameter of shaft using two different theories of failure and assuming a FOS of 2. Take E=210GPa and poisson ratio =0.25 [QNO. 13] [ ] Q1) Why factor of safety is necessary in design of mechanical component? Discuss the important factors influencing the selection of factor of safety. [3+3] Q2) The dimensions of an overhang crank are given in fig. the force P acting at the crankpin is 1 KN.the crank is made of steel 30C8(S yt =400N/mm 2 ) and factor of safety=2. Using maximum shear stress theory, determine diameter at section XX. [7] Q3) A hanger is shown in fig. is subjected to a pull of 10kN, acting at an angel of 30 to vertical. The bracket has a rectangular section whose depth is two times its thickness. If the permissible tensile stress is 60kN/mm 2, determine the cross-section of the bracket. [7] EME-501/Mr. Ajay Kumar, Ms. Chitra Bajpai
4 EME-501/Mr. Ajay Kumar, Ms. Chitra Bajpai
5 Time: 1 Hour B.Tech. [SEM V (ME)] QUIZ TEST-1 MACHINE DESIGN-1 Note: Attempt all questions. Q1) Discuss the basic requirements for machine elements and machine? [QNO.4] [2+3] Q2) A Shaft shown in fig. is subjected to a bending load of 3KN, pure torque of 1000 N-m and axial pulling force of 15 KN. Calculate the stresses at A and B. [QNO. 12] [ ] A 3KN 15KN B 1000N-m Q1) Why factor of safety is necessary in design of mechanical component? Discuss the important factors influencing the selection of factor of safety. [3+3] Q2) The dimensions of an overhang crank are given in fig. the force P acting at the crankpin is 1 KN.the crank is made of steel 30C8(S yt =400N/mm 2 ) and factor of safety=2. Using maximum shear stress theory, determine diameter at section XX. [7] Q3) A hanger is shown in fig. is subjected to a pull of 10kN, acting at an angel of 30 to vertical. The bracket has a rectangular section whose depth is two times its thickness. If the permissible tensile stress is 60kN/mm 2, determine the cross-section of the bracket. [7] EME-501/Mr. Ajay Kumar, Ms. Chitra Bajpai
6 EME-501/Mr. Ajay Kumar, Ms. Chitra Bajpai
7 Time: 1 Hour B.Tech. [SEM V (ME)] QUIZ TEST-1 MACHINE DESIGN-1 Note: Attempt all questions. Q1) What is the importance of standardization in design? [QNO.5] [5] Q2) Design a suitable diameter for a circular shaft required to transmit 90kW at 180 rpm. The shear stress in the shaft is not to exceed 70 MPa and the maximum torque exceeds the mean by 40%. Also find the angle of twist in the length of 2 meters. Take G=90GPa. [QNO. 8] [3+2] Q1) Why factor of safety is necessary in design of mechanical component? Discuss the important factors influencing the selection of factor of safety. [3+3] Q2) The dimensions of an overhang crank are given in fig. the force P acting at the crankpin is 1 KN.the crank is made of steel 30C8(S yt =400N/mm 2 ) and factor of safety=2. Using maximum shear stress theory, determine diameter at section XX. [7] Q3) A hanger is shown in fig. is subjected to a pull of 10kN, acting at an angel of 30 to vertical. The bracket has a rectangular section whose depth is two times its thickness. If the permissible tensile stress is 60kN/mm 2, determine the cross-section of the bracket. [7] EME-501/Mr. Ajay Kumar, Ms. Chitra Bajpai
8 EME-501/Mr. Ajay Kumar, Ms. Chitra Bajpai
9 Time: 1 Hour B.Tech. [SEM V (ME)] QUIZ TEST-1 MACHINE DESIGN-1 Note: Attempt all questions. Q1) Briefly discuss the BIS criteria for specification of carbon steels and alloy steels. Write BIS designation of followings: 35C12S12, 40C1V23, 20C4, FeE450 [QNO.3] [3+2] Q2) A mild steel of shaft of 50mm diameter is subjected to a bending moment of 2000 N-m and a torque T.If the yield point of the steel in tension is 2000MPa, find the maximum value of this torque without causing yielding of the shaft according to, [ SUPP QNO. 1] [ ] 1. The maximum principal stress 2. The maximum shear stress Q1) Why factor of safety is necessary in design of mechanical component? Discuss the important factors influencing the selection of factor of safety. [3+3] Q2) The dimensions of an overhang crank are given in fig. the force P acting at the crankpin is 1 KN.the crank is made of steel 30C8(S yt =400N/mm 2 ) and factor of safety=2. Using maximum shear stress theory, determine diameter at section XX. [7] Q3) A hanger is shown in fig. is subjected to a pull of 10kN, acting at an angel of 30 to vertical. The bracket has a rectangular section whose depth is two times its thickness. If the permissible tensile stress is 60kN/mm 2, determine the cross-section of the bracket. [7] EME-501/Mr. Ajay Kumar, Ms. Chitra Bajpai
10 EME-501/Mr. Ajay Kumar, Ms. Chitra Bajpai
11 SHRI RAMSWAROOP MEMORIAL COLLEGE OF ENGG. & MANAGEMENT B.Tech. [SEM VI (ME)] QUIZ TEST-2 Time: 1 Hour MACHINE DESIGN-1 Note: Attempt all questions Q1) Show by neat sketches the various ways in which a riveted joint may fail. [QNO.4][ 3+2] Q2) A circular bar of 500 mm length is supported freely as its two ends. It is acted upon by a central concentrated cyclic load having a minimum value of 20 KN and a maximum value of 50 KN. Determine the diameter of the bar by taking factor of safety of 1.5, size effect of 0.85, surface finish factor of 0.9. The material properties are given by: ultimate strength of 650MPa, yield strength of 500 MPa, and endurance strength of 350 MPa. [QNO.6][3+2] Q3) Draw a double riveted butt joint with two unequal cover plate of zig- zag riveting. Define its nomenclature. [2+2] Q4) A tie bar in a bridge consists of a flat 350mm wide and 20mm thick. It is connected to a gusset plate of the same thickness by a double cover butt joint. Design an structural joint if the permissible stresses are: σt=90mpa, σc=150mpa,, τ =60MPa. [3+3+2] Q5) A bar of circular cross-section is subjected to alternating tensile forces varying from a minimum of 200 KN to a maximum 500KN. It is to be manufactured of a material with an ultimate tensile strength of 900 MPa and an endurance limit of 700MPa. Determine the diameter of bar using factor of safety of 3.5 related to ultimate tensile strength and 4 related to endurance limit. And a stress concentration factor of 1.65 for fatigue load. Use Goodman line as basis for the design[3+3+2]. EME-501/Mr. Ajay Kumar/Chitra bajpai Date: 1 / 10 /2014 Page-1
12 B.Tech. [SEM VI (ME)] QUIZ TEST-2 Time: 1 Hour MACHINE DESIGN-1 Note: Attempt all questions Q1) Classify the rivet heads according to Indian standard specifications. [QNO. 5] [3+2] Q2) A steel plate having ultimate tensile strength of 440 MPa is hot rolled and normalized. It is 60 mm wide and has a central circular hole of 12 mm diameter as shown in fig. It is subjected to a completely reversed axial load of 20 KN. The notch sensitivity factor is 0.8 and the expected reliability is 90%. The factor of safety is 2. Determine the thickness of plate. [QNO.8] [3+2] P=20KN P=20KN. 60mm Q3) Draw a double riveted butt joint with two unequal cover plate of zig- zag riveting. Define its nomenclature. [2+2] Q4) A tie bar in a bridge consists of a flat 350mm wide and 20mm thick. It is connected to a gusset plate of the same thickness by a double cover butt joint. Design an structural joint if the permissible stresses are: σt=90mpa, σc=150mpa,, τ =60MPa. [3+3+2] Q5) A bar of circular cross-section is subjected to alternating tensile forces varying from a minimum of 200 KN to a maximum 500KN. It is to be manufactured of a material with an ultimate tensile strength of 900 MPa and an endurance limit of 700MPa. Determine the diameter of bar using factor of safety of 3.5 related to ultimate tensile strength and 4 related to endurance limit. And a stress concentration factor of 1.65 for fatigue load. Use Goodman line as basis for the design. [3+3+2] EME-501/Mr. Ajay Kumar/Chitra bajpai Date: 1 / 10 /2014 Page-1
13 B.Tech. [SEM VI (ME)] QUIZ TEST-2 Time: 1 Hour MACHINE DESIGN-1 Note: Attempt all questions Q1) What is stress concentration.what are the causes of stress concentration. [QNO. 1] [ ] Q2) A double riveted lap joint with chain riveting is to be made for joining two plates of 6mm thickness. Determine diameter of the rivets, distance between rows of rivets and pitch of rivets. Indicate how the joint will fail. Assume σt=220mpa, σc= 150MPa, τ=100mpa. [QNO.9][3+2] Q3) Draw a double riveted butt joint with two unequal cover plate of zig- zag riveting. Define its nomenclature. [2+2] Q4) A tie bar in a bridge consists of a flat 350mm wide and 20mm thick. It is connected to a gusset plate of the same thickness by a double cover butt joint. Design an structural joint if the permissible stresses are: σt=90mpa, σc=150mpa,, τ =60MPa. [3+3+2] Q5) A bar of circular cross-section is subjected to alternating tensile forces varying from a minimum of 200 KN to a maximum 500KN. It is to be manufactured of a material with an ultimate tensile strength of 900 MPa and an endurance limit of 700MPa. Determine the diameter of bar using factor of safety of 3.5 related to ultimate tensile strength and 4 related to endurance limit. And a stress concentration factor of 1.65 for fatigue load. Use Goodman line as basis for the design [3+3+2]. EME-501/Mr. Ajay Kumar/Chitra bajpai Date: 1 / 10 /2014 Page-1
14 B.Tech. [SEM VI (ME)] QUIZ TEST-2 Time: 1 Hour MACHINE DESIGN-1 Note: Attempt all questions Q1) What is the difference between failure due to static load and fatigue load? [QNO. 2] [3+2] Q2) Two plates of l0mm thickness each are to be joined by means of a single riveted double strap butt joint. Design for the joint. Take the working stresses in tension and shearing as 80MPa and 60MPa respectively. [QNO.14] [3+2] Q3) Draw a double riveted butt joint with two unequal cover plate of zig- zag riveting. Define its nomenclature. [2+2] Q4) A tie bar in a bridge consists of a flat 350mm wide and 20mm thick. It is connected to a gusset plate of the same thickness by a double cover butt joint. Design an structural joint if the permissible stresses are: σt=90mpa, σc=150mpa,, τ =60MPa. [3+3+2] Q5) A bar of circular cross-section is subjected to alternating tensile forces varying from a minimum of 200 KN to a maximum 500KN. It is to be manufactured of a material with an ultimate tensile strength of 900 MPa and an endurance limit of 700MPa. Determine the diameter of bar using factor of safety of 3.5 related to ultimate tensile strength and 4 related to endurance limit. And a stress concentration factor of 1.65 for fatigue load. Use Goodman line as basis for the design. [3+2+3] EME-501/Mr. Ajay Kumar/Chitra bajpai Date: 1 / 10 /2014 Page-1
15 B.Tech. [SEM VI (ME)] QUIZ TEST-2 Time: 1 Hour MACHINE DESIGN-1 Note: Q1) What is the difference between Gerber curve, Soderberg and Goodman line? [Q.NO 3][3+2] Q2) Find the efficiency of the following riveted joints: [Q.NO13][2+2+1] i)single riveted lap joint of 6mm plate with 20 mm diameter rivets having a pitch of 50mm ii)double riveted lap joint of 6mm plates with 20mm diameter rivets having a pitch of 65mm.Assume permissible tensile stress in plate=120mpa, permissible shearing stress in rivets=90mpa, permissible crushing stresses in rivets=180mpa Q3) Draw a double riveted butt joint with two unequal cover plate of zig- zag riveting. Define its nomenclature. [2+2] Q4) A tie bar in a bridge consists of a flat 350mm wide and 20mm thick. It is connected to a gusset plate of the same thickness by a double cover butt joint. Design an economical joint if the permissible stresses are: σt=90mpa, σc=150mpa, τ=60mpa. [3+3+2] Q5) A bar of circular cross-section is subjected to alternating tensile forces varying from a minimum of 200 KN to a maximum 500KN. It is to be manufactured of a material with an ultimate tensile strength of 900 MPa and an endurance limit of 700MPa. Determine the diameter of bar using factor of safety of 3.5 related to ultimate tensile strength and 4 related to endurance limit. And a stress concentration factor of 1.65 for fatigue load. Use Goodman line as basis for the design. [3+3+2] EME-501/Mr. Ajay Kumar/Chitra bajpai Date: 1 / 10 /2014 Page-1
16 Time: 1 Hour B.Tech. [SEM V (ME)] QUIZ TEST-3 MACHINE DESIGN-1 Note: Attempt all questions. Q1) Explain various types of stresses induced in the key. [Q.NO.1][2+2+1] Q2) Design a shaft to transmit power from an electrical motor to a lathe head stock through a pulley by means of a belt drive. The pulleys weigh 200N and are located at 300 from the center of the bearings. The diameter of the pulley is 200mm and the maximum power transmitted is 1 KW at 120 rpm. The angle of the lap of the belt is 180 and the coefficient of friction between the belt and the pulley is 0.3. The shock and fatigue factor for bending and twisting are 1.5 and 2 respectively. The allowable shear stress in the shaft is 35MPa. [Q.NO.11][2+3] Q3)What are the requirements of good shaft coupling? Define the term coupling and explain various types of shaft coupling with neat sketch.[3+3]. Q4)A 45mm diameter shaft is made of steel with a yield strength of 400 MPa.A parallel key of size 14mm wide and 9 mm thick made of steel with a yield strength of 340MPa is to be used.find the required length of key, if the shaft is loaded to transmit the maximum permissible torque.use maximum shear stress theory and assume a factor of safety of 2. [3+4] Q5) A shaft carrying a pulley A and gear B and supported in two bearings C and D. The shaft transmits 20 kw at 150 rpm the tangential force F t on gear B acts vertically upwards. The pulley delivers the power through a belt to another pulley of equal diameter vertically below the pulley A. The ratio of tension T 1 /T 2 =2.5. Weights of gear and pulley are 900N and 2700N.The permissible shear stress for the material of shaft may be taken as 63MPa. Take k m =2 and k t =1.5. Determine the diameter of the shaft. EME-501/Mr. Ajay Kumar, Ms. Chitra Bajpai
17 Time: 1 Hour B.Tech. [SEM V (ME)] QUIZ TEST-3 MACHINE DESIGN-1 Note: Attempt all questions. Q1) How are the keys classified? Draw neat sketches of different types of keys and state their applications. [Q.NO4][2+2+1] Q2) A mild steel shaft transmits 200KW at 200 rpm. It carries a central load of 900N and is simply supported between the bearings 2.5 meter apart. Determine the size of the shaft, if the allowable shear stress is 42 MPa and the maximum tensile or compressive tress is not be exceed 56 MPa. What size of the shaft will be required, if it is subjected to gradually applied loads? [Q.NO 10][2+2+1] Q3)What are the requirements of good shaft coupling? Define the term coupling and explain various types of shaft coupling with neat sketch.[3+3]. Q4)A 45mm diameter shaft is made of steel with a yield strength of 400 MPa.A parallel key of size 14mm wide and 9 mm thick made of steel with a yield strength of 340MPa is to be used.find the required length of key, if the shaft is loaded to transmit the maximum permissible torque.use maximum shear stress theory and assume a factor of safety of 2. [3+4] Q5) A shaft carrying a pulley A and gear B and supported in two bearings C and D. The shaft transmits 20 kw at 150 rpm the tangential force F t on gear B acts vertically upwards. The pulley delivers the power through a belt to another pulley of equal diameter vertically below the pulley A. The ratio of tension T 1 /T 2 =2.5. Weights of gear and pulley are 900N and 2700N.The permissible shear stress for the material of shaft may be taken as 63MPa. Take k m =2 and k t =1.5. Determine the diameter of the shaft. EME-501/Mr. Ajay Kumar, Ms. Chitra Bajpai
18 Time: 1 Hour B.Tech. [SEM V (ME)] QUIZ TEST-3 MACHINE DESIGN-1 Note: Attempt all questions. Q1) ) The bolt in the coupling should be made weaker than the other component of coupling. Why? [Q.NO 5][2+2+1] Q2) A rotating shaft, 40 mm in diameter is made of steel FeE580. It is subjected to a steady torsional moment of 250N-m and bending moment of 1250N-m. Calculate the factor of safety by using: 1) Maximum principal stress theory 2) Maximum shear stress theory [Q.NO 13][3+2] Q1) What are the requirements of good shaft coupling? Define the term coupling and explain various types of shaft coupling with neat sketch.[3+3]. Q4)A 45mm diameter shaft is made of steel with a yield strength of 400 MPa.A parallel key of size 14mm wide and 9 mm thick made of steel with a yield strength of 340MPa is to be used.find the required length of key, if the shaft is loaded to transmit the maximum permissible torque.use maximum shear stress theory and assume a factor of safety of 2. [3+4] Q5) A shaft carrying a pulley A and gear B and supported in two bearings C and D. The shaft transmits 20 kw at 150 rpm the tangential force F t on gear B acts vertically upwards. The pulley delivers the power through a belt to another pulley of equal diameter vertically below the pulley A. The ratio of tension T 1 /T 2 =2.5. Weights of gear and pulley are 900N and 2700N.The permissible shear stress for the material of shaft may be taken as 63MPa. Take k m =2 and k t =1.5. Determine the diameter of the shaft. EME-501/Mr. Ajay Kumar, Ms. Chitra Bajpai
19 EME-501/Mr. Ajay Kumar, Ms. Chitra Bajpai
20 Time: 1 Hour B.Tech. [SEM V (ME)] QUIZ TEST-3 MACHINE DESIGN-1 Note: Attempt all questions. Q1) Under what circumstances hollow shafts are preferred over solid shaft? Give any two examples where hollow shafts are used. [Q.NO2][2+2+1] Q2) Determine the length and thickness of a sunk key for a shaft of 0.09 diameter. Assuming that the shearing resistance of the key material is the same as that of the shaft. Width of the key is 25mm and τ=0.4σ c. [Q.NO.15][2+2+1] Q3)What are the requirements of good shaft coupling? Define the term coupling and explain various types of shaft coupling with neat sketch.[3+3]. Q4)A 45mm diameter shaft is made of steel with a yield strength of 400 MPa.A parallel key of size 14mm wide and 9 mm thick made of steel with a yield strength of 340MPa is to be used.find the required length of key, if the shaft is loaded to transmit the maximum permissible torque.use maximum shear stress theory and assume a factor of safety of 2. [3+4] Q5) A shaft carrying a pulley A and gear B and supported in two bearings C and D. The shaft transmits 20 kw at 150 rpm the tangential force F t on gear B acts vertically upwards. The pulley delivers the power through a belt to another pulley of equal diameter vertically below the pulley A. The ratio of tension T 1 /T 2 =2.5. Weights of gear and pulley are 900N and 2700N.The permissible shear stress for the material of shaft may be taken as 63MPa. Take k m =2 and k t =1.5. Determine the diameter of the shaft EME-501/Mr. Ajay Kumar, Ms. Chitra Bajpai
21 EME-501/Mr. Ajay Kumar, Ms. Chitra Bajpai
22 Time: 1 Hour B.Tech. [SEM V (ME)] QUIZ TEST-3 MACHINE DESIGN-1 Note: Attempt all questions. Q1) Define equivalent twisting moment and equivalent bending moment. State when these two terms are used in the design of shaft. [Q.NO.3][2+2+1] Q2) Design a muff coupling, which is used to connect two steel shafts transmitting 25 KW power at 310 rpm. The shaft and keys are made of same plain carbon steel (s yt =s yc =400N/mm2). The sleeve is made from grey cast iron FG200. The factor of safety for the shaft and key is 4. For sleeve the factor of safety is 6 based on ultimate strength. [Q.NO.9][2+2+1] Q3) i)what are the requirements of good shaft coupling? ii)define the term coupling and explain various types of shaft coupling with neat sketch.[3+3]. Q4)A 45mm diameter shaft is made of steel with a yield strength of 400 MPa.A parallel key of size 14mm wide and 9 mm thick made of steel with a yield strength of 340MPa is to be used.find the required length of key, if the shaft is loaded to transmit the maximum permissible torque.use maximum shear stress theory and assume a factor of safety of 2. [3+4] Q5) A shaft carrying a pulley A and gear B and supported in two bearings C and D. The shaft transmits 20 kw at 150 rpm the tangential force F t on gear B acts vertically upwards. The pulley delivers the power through a belt to another pulley of equal diameter vertically below the pulley A. The ratio of tension T 1 /T 2 =2.5. Weights of gear and pulley are 900N and 2700N.The permissible shear stress for the material of shaft may be taken as 63MPa. Take k m =2 and k t =1.5. Determine the diameter of the shaft. EME-501/Mr. Ajay Kumar, Ms. Chitra Bajpai Date: 30 / 11 /2014
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