2026 question paper
Design of Machine Elements
28 questions
Q.1(a). (a) A solid shaft transmits a torque T. The allowable shear stress is \tau. The diameter of the shaft is (i) \sqrt[3]{\frac{16T}{\pi\tau}} (ii) \sqrt[3]{\frac{32T}{\pi\tau}} (iii) \sqrt[3]{\frac{64T}{\pi\tau}} (iv) \sqrt[3]{\frac{16T}{\tau}}20262m
Module 2: Design of Shafts
View this question on its own page →(a) A solid shaft transmits a torque . The allowable shear stress is . The diameter of the shaft is
(i)
(ii)
(iii)
(iv)
Q.1(b). Lewis equation in spur gears is used to find the (i) Tensile stress in bending (ii) Shear stress (iii) Compressive stress in bending (iv) Fatigue stress20262m
Module 5: Design of Transmission Elements
View this question on its own page →Lewis equation in spur gears is used to find the
(i) Tensile stress in bending
(ii) Shear stress
(iii) Compressive stress in bending
(iv) Fatigue stressQ.1(c). The transverse fillet welded joints are designed for (i) Tensile strength (ii) Compressive strength (iii) Bending strength (iv) Shear strength20262m
Module 3: Joints
View this question on its own page →The transverse fillet welded joints are designed for
(i) Tensile strength
(ii) Compressive strength
(iii) Bending strength
(iv) Shear strengthQ.1(d). The resilience of a bolt may be increased by (i) Increasing its shank diameter (ii) Increasing its length (iii) Decreasing its shank diameter (iv) Decreasing its length20262m
Module 3: Joints
View this question on its own page →The resilience of a bolt may be increased by
(i) Increasing its shank diameter
(ii) Increasing its length
(iii) Decreasing its shank diameter
(iv) Decreasing its lengthQ.1(e). The stress which varies from a minimum value to a maximum value of the same nature (i.e. tensile or compressive) is called (i) Repeated stress (ii) Yield stress (iii) Fluctuating stress (iv) Alternating stress20262m
Module 1: Introduction to Design
View this question on its own page →The stress which varies from a minimum value to a maximum value of the same nature (i.e. tensile or compressive) is called
(i) Repeated stress
(ii) Yield stress
(iii) Fluctuating stress
(iv) Alternating stressQ.1(f). Failure of a material is called fatigue when it fails (i) At the elastic limit (ii) Below the elastic limit (iii) At the yield point (iv) Below the yield point20262m
Module 1: Introduction to Design
View this question on its own page →Failure of a material is called fatigue when it fails
(i) At the elastic limit
(ii) Below the elastic limit
(iii) At the yield point
(iv) Below the yield pointQ.1(g). A leaf spring in automobiles is used (i) To apply forces (ii) To measure forces (iii) To absorb shocks (iv) To store strain energy20262m
Module 6: Springs
View this question on its own page →A leaf spring in automobiles is used
(i) To apply forces
(ii) To measure forces
(iii) To absorb shocks
(iv) To store strain energyQ.1(h). A jaw clutch is essentially a (i) Positive action clutch (ii) Cone clutch (iii) Friction clutch (iv) Disc clutch20262m
Module 4: Design of Clutches and Brakes
View this question on its own page →A jaw clutch is essentially a
(i) Positive action clutch
(ii) Cone clutch
(iii) Friction clutch
(iv) Disc clutchQ.1(i). A brake commonly used in railway train is (i) Shoe brake (ii) Band brake (iii) Band and block brake (iv) Internal expanding brake20262m
Module 4: Design of Clutches and Brakes
View this question on its own page →A brake commonly used in railway train is
(i) Shoe brake
(ii) Band brake
(iii) Band and block brake
(iv) Internal expanding brakeQ.1(j). The taper roller bearings can take (i) Radial load only (ii) Axial load only (iii) Both radial and axial loads (iv) None of the above20262m
Module 2: Design of Shafts
View this question on its own page →The taper roller bearings can take
(i) Radial load only
(ii) Axial load only
(iii) Both radial and axial loads
(iv) None of the above- Install PocketlyBudget App•POCKETLY
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Q.2(a). What are the three basic modes of failure of mechanical components?20267m
Module 1: Introduction to Design
View this question on its own page →What are the three basic modes of failure of mechanical components?
Q.2(b). What is the difference between failure due to static load and fatigue failure?20267m
Module 1: Introduction to Design
View this question on its own page →What is the difference between failure due to static load and fatigue failure?
Q.3(a). Establish the relationship between leg and throat of fillet weld.20267m
Module 3: Joints
View this question on its own page →Establish the relationship between leg and throat of fillet weld.
Q.3(b). A 65 mm diameter solid shaft is to be welded to a flat plate by a fillet weld around the circumference of the shaft. Determine the size of the weld if the torque on the shaft is 3 kN-m. The allowable shear stress in the weld is 70 MPa.20267m
Module 3: Joints
View this question on its own page →A 65 mm diameter solid shaft is to be welded to a flat plate by a fillet weld around the circumference of the shaft. Determine the size of the weld if the torque on the shaft is 3 kN-m. The allowable shear stress in the weld is 70 MPa.
Q.4(a). Why clutches are usually designed on the basis of uniform wear?20267m
Module 4: Design of Clutches and Brakes
View this question on its own page →Why clutches are usually designed on the basis of uniform wear?
Q.4(b). A plate clutch consists of one pair of contacting surfaces and transmits 20 kW power at 750 rpm. The ratio of outer diameter to inner diameter is 2. The coefficient of friction is 0.2 and the permissible intensity of pressure is 1 N/mm². Assuming uniform wear theory, calculate the inner and outer diameters.20267m
Module 4: Design of Clutches and Brakes
View this question on its own page →A plate clutch consists of one pair of contacting surfaces and transmits 20 kW power at 750 rpm. The ratio of outer diameter to inner diameter is 2. The coefficient of friction is 0.2 and the permissible intensity of pressure is 1 N/mm². Assuming uniform wear theory, calculate the inner and outer diameters.
Q.5(a). What is the function of brake? State different types of brakes.20267m
Module 4: Design of Clutches and Brakes
View this question on its own page →What is the function of brake? State different types of brakes.
Q.5(b). Briefly describe advantages, disadvantages and application of band brake.20267m
Module 4: Design of Clutches and Brakes
View this question on its own page →Briefly describe advantages, disadvantages and application of band brake.
Q.6(a). What type of stresses are induced in shafts?20267m
Module 2: Design of Shafts
View this question on its own page →What type of stresses are induced in shafts?
Q.6(b). A shaft running at 400 rpm transmits 10 kW. Assuming allowable shear stress in the shaft as 40 MPa, find the diameter of the shaft.20267m
Module 2: Design of Shafts
View this question on its own page →A shaft running at 400 rpm transmits 10 kW. Assuming allowable shear stress in the shaft as 40 MPa, find the diameter of the shaft.
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Q.7(a). What is Wahl factor? Why is it used?20267m
Q.7(b). What is nipping in a leaf spring? Discuss its role.20267m
Module 6: Springs
View this question on its own page →What is nipping in a leaf spring? Discuss its role.
Q.8(a). How are the gears classified and what are the various terms used in spur gear terminology?20267m
Module 5: Design of Transmission Elements
View this question on its own page →How are the gears classified and what are the various terms used in spur gear terminology?
Q.8(b). What are the various forces acting on worm and worm gears?20267m
Module 5: Design of Transmission Elements
View this question on its own page →What are the various forces acting on worm and worm gears?
Q.9(a). Write short note on: Caulking and fullering20267m
Q.9(b). Write short note on: Various forces acting on a bevel gear20267m
Module 5: Design of Transmission Elements
View this question on its own page →Write short note on: Various forces acting on a bevel gear
Q.9(c). Write short note on: Rolling contact bearing20267m
Module 2: Design of Shafts
View this question on its own page →Write short note on: Rolling contact bearing
Q.9(d). Write short note on: Endurance limit20267m
Module 1: Introduction to Design
View this question on its own page →Write short note on: Endurance limit
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