Subject 2018 Question Paper — Government College of Engineering and T…
The 2018 Subject previous year question paper (Government College of Engineering and Technology, Jammu), with every question and its marks.
- University: Government College of Engineering and Technology, Jammu
- Course: Mechanical Engineering
- Branch: CIVIL ENGG.
- Year: 2018
- Paper: end-term
- Duration: 180 minutes
- Total marks: 100
Instructions
- Attempt Five questions in all selecting at least One question from each unit.
- Data not given may be assume suitably.
Questions
UNIT-I
- Q1. Explain the following : i. Double slides crank chain ii. Whitworth Quick Return motion mechanism iii. Four-bar chain iv. Kinematic pair and kinematic chain [20 marks]
- Q2. In a four bar chain ABCD, AD is fixed and is 120 mm long. The crank AB is 30 mm long and rotates at 100 r.p.m. Clockwise, while the link CD=60mm oscillates about D. BC and AD are of equal length. Find the angular velocity of link CD when angle BAD = 60° [20 marks]
UNIT-II
- Q3. Explain the following : i. Law of dry friction ii. Angle of response iii. Flat collar bearing iv. Axial free required at engagement of cone clutch. [20 marks]
- Q4. A shaft which rotates at a constant speed of 160 rpm is connected by belting to a parallel shaft 72 cm apart which has to run at 60, 80 and 100 rpm. The smallest pulley on the drives shaft is 4cm in radius. Determine the remaining radii of the two stepped pulley for(a) a cross belt (b) an open belt. Neglect belt thickness and slip. [20 marks]
UNIT-III
- Q5. Explain the following : i. Law of gearing ii. Minimum number of teeth on pinion iii. Compound gear train iv. Epicyclic gear train [20 marks]
- Q6. A cam has a minimum radius of 4 cm and follower lift 6 cm. The cam rotates through 80° for rise and 80° for fall with no top dwell. Draw the cam profile for circular arc cam with 2 cm nose radius. Find the maximum value of the acceleration and retardation of the flat faced follower, when cam rotates at 300 r.p.m. [20 marks]
UNIT-IV
- Q7. Explain the following terms. i. Torsional vibration ii. Resonance iii. Damped and un damped vibration iv. Critical damping constant and damping ratio. [20 marks]
- Q8. Explain the following with details i. Swaying couple ii. Hammer blow iii. Balancing of several masses revolving in the same plane. iv. Balancing of reciprocating mass. [20 marks]