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Elements of Design 5th Sem/9326/May 2015 Automobile Diploma Paper

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Elements of Desgin 5th Sem May 2015 Automobile Diploma Paper

                             SECTION-A

Q1.Fill in the Blanks:- 1.5×10=15

1. The material commonly used for shaft is ______________
2 ____________ fit is a form of tight fit.
3. The ability of a material to be converted into sheets is called __________
4. Two intersecting shafts can be connected by __________ gears
5. The ratio of no. Of teeth to pitch circle diameter is called ______________
6. The tapper on a rectangular sunk key is ______________
7. Clutch operates on a principle of _____________
8. Fluctuation of speed and energy is controlled by _____________
9. Flange coupling is a type of ____________
10 _________ type of flange coupling is used in ships turbine.

True or false:
1. In marine type flange coupling, key is used.
2. No. Of bolts does not depend upon the diameter of shaft.
3. Worm gears are used for large speed ratios.
4. The usual proportion for the width of key is d/4.
5. Gas turbine does not require flywheel.

          SECTION-B

Q2. Attempt any five questions.                                                                    5×6=30

1. Write in detail the procedure of designing the machine elements?
2. Define the properties of material Elasticity, Plasticity, Toughness, Strength, Ductility.
3. Give the classification of keys and couplings?
4. What are the basic requirements in designing a machine component?
5. Define the terms related to gear Addendum, Dedendum, Backlash, Module, Diametral pitch.
6. Give a neat sketch of different joints used in welding?
7. Sketch Protective type flange coupling and show its design measurements and parts?
8. A shaft is required to transmit a power of 100 KW at 120 r.p.m. What is the diameter of shaft if torsional stress is 60 MPa?
9. A rectangular sunk key 24 mm wide, 16 mm thick and 100 mm long is required to transmit 1000 N-m torque from a 120 mm diameter shaft. Calculate the induced shear and crushing stresses in the key.

   SECTION-C

Q3. Attempt any three questions.                                                      3×10=30

i. Explain in detail the brake efficiency tester.
ii. Explain in detail the construction and working of cylinder line boring machine.
iii. What is wheel alignment? Describe the working of computerized wheel alignment equipment.
iv. Discuss in detail the following:
a) Radiator tester b) Hydraulic trolley type jack

Elements of Desgin 5th Sem May 2015 Automobile Diploma Paper

The material commonly used for shaft is ______________

____________ fit is a form of tight fit.

The ability of a material to be converted into sheets is called __________

Two intersecting shafts can be connected by __________ gears

The ratio of no. Of teeth to pitch circle diameter is called ______________

The tapper on a rectangular sunk key is ______________

Clutch operates on a principle of _____________

Fluctuation of speed and energy is controlled by _____________

Flange coupling is a type of ____________

_________ type of flange coupling is used in ships turbine.

 

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Elements of Desgin 5th Sem May 2015 Automobile Diploma Paper  Click Here

Procedure of designing the machine elements.

Properties of material Elasticity, Plasticity, Toughness, Strength, Ductility.

Classification of keys and couplings.

Basic requirements in designing a machine component.

Protective type flange coupling and show its design measurements and parts.

Shaft is required to transmit a power of 100 KW at 120 r.p.m. What is the diameter of shaft if torsional stress is 60 MPa.

Rectangular sunk key 24 mm wide, 16 mm thick and 100 mm long is required to transmit 1000 N-m torque from a 120 mm diameter shaft. Calculate the induced shear and crushing stresses in the key.

Elements of Desgin 5th Sem May 2015 Automobile Diploma Paper Click Here

Elements of Desgin 5th Sem May 2015 Automobile Diploma Paper

Explain the consideration which influences the design.

Key and its various types with neat sketch .

Knuckle joint to to connect two mild steel bars under a tensile load of 25KN. The design stress may be taken as 65 MPa in tension, 50 MPa in shear and 83 MPa in compression.

Flange coupling for a mild steel shaft transmitting 90 kW at 250 rpm. Allowable shear stress for mild steel = 40 MPa, for cast iron = 14 MPa and for bolt material = 30 MPa. The materials for shaft and key are same.

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