mgu.ac.in Model Question Paper Engineering Mechanics : Mahatma Gandhi University

Name of the Organaisation : Mahatma Gandhi University (mgu.ac.in)
Type of Announcement : Model Question Paper

Home Page : http://www.mgu.ac.in/
Model Question Paper :
Engineering Mechanics : https://www.indianjobtalks.in/uploads/7291-Model%20Question%20Paper-EM.pdf
Basic Mechanical Engineering : https://www.indianjobtalks.in/uploads/7291-BME%20Model%20Question%20Paper-2.pdf
Basic Electrical Engineering : https://www.indianjobtalks.in/uploads/7291-bee%20model%20question%20paper-2.pdf

Subject Name : Engineering Mechanics Code .No – EN010 104 Time – 3 Hrs Marks – 100
Part A
1. What are the conditions of equilibrium of rigid bodies?
2. Explain the principle of virtual work
3. Define static indeterminacy
4. Define instantaneous centre of zero velocity
5. State D’Alembert’s principle
Part B
6. State and prove Varignon’s theorem
7. Derive the expression for the centroid of right angled triangle.
8. State laws of dry friction
9. Derive the expression for natural frequency of undamped free vibration.
10. A car of weight 20kN moving at a speed of 0.5m/s to the right collides with a car of weight 35kN which is at rest. If after the collision the second car is observed to move to the right at a speed of 0.3m/s. Determine the coefficient of restitution between the two cars.
Part C
1. A police officer observes a motorist who is approaching at a uniform speed of 80kmph. He, in his patrol car, starts chasing it as it just crosses him. After accelerating for 8seconds at a constant rate, he attains his top speed of 120kmph. How long does it take to overtake the motorist and at what distance
2. A hammer of mass 400kg, falls through a height of 3m on a pile of negligible mass. If it drives the pile 1m into the ground, determine the average resistance of the ground per penetration.
3. A train of mass 250 x103 kg starts from rest and accelerates uniformly to a speed of 81kmph in 20 seconds. The frictional resistance to motion is 20kN. Determine (i) maximum power required and (ii) the power required to maintain speed of 81 kmph.

Subject – Basic Mechanical Engineering Time – 3 Hrs Marks – 100
Part – A
I. Answer all Questions :
1) Explain Fourier law of heat conduction.
2) Define COP of a refrigerator.
3) List out the types of belt drives.
4) Compare centrifugal and reciprocating pumps.
5) Explain the types of milling.
Part – B
II. Answer all Questions :
6) Define a Quasi-Static process and state its salient characteristics.
7) Compare Petrol and Diesel engines
8) Explain the types of gear trains.
9) Explain the working of a Pelton turbine.
10) List any five properties of moulding sand.
Part – C
11. Draw the PV and TS diagrams of an Otto cycle. Derive the expression for the air standard efficiency of the same
OR
12. Explain the working of four stroke petrol engine with neat sketches.
13. Explain the working of vapour absorption refrigeration system with the help of a neat sketch.
OR
14. Derive the expression for calculating the length of belt for a cross belt drive
15. Derive an expression for ratio of belt tensions
OR
Explain the different methods of compounding for steam turbines

Subject Name : Basic Electrical Engineering Code No. EN010 108 Time – 3 hrs Marks – 100
Part -A
I. Answer all questions. Each question carries 3 marks :
1. Write the equation for converting a Delta connected network to equivalent star connected network and vice versa.
2. Define RMS value, Average value and Form factor.
3. Explain the necessity of starter in a DC motor.
4. What are the different types of single phase induction motor?
5. Distinguish between a feeder, distributor and service mains.
Part B
II. Answer all questions. Each question carries 5 marks :
6. Derive the expression for the RMS value of a sinusoidal voltage.
7. Derive the emf equation of single phase transformer.
8. A50Hz , 4 pole 3phase Induction motor has a rotor current of frequency 2Hz.Determine i)the slip and ii) the speed of the motor.
9. What are the requirements of a good lighting system?
Part C
10. a) State and Explain Kirchoff’s laws.
11.a)Distinguish between electric and magnetic circuit.
b) A magnetic core in the form of closed ring has a mean length of 20cm and a cross section of 1cm².The µr of iron is 2400.What current will be needed in a coil of 2000 turns uniformly wound round the ring to create a flux of 0.2mWb in the iron.If an air gap of 1mm is cut through the core perpendicular to the direction of this flux , what will be the current needed to maintain the small flux in the gap?
12.a) Distinguish between statically induced emf and dynamically induced emf.
b) From the fundamentals derive an expression for the average power in an ac circuit.
13. a)Why a single phase induction motor is not self starting?
b) Describe the different rotor constructions in an alternator.
14. a) Describe the various non conventional energy sources