B.TECH - Semester 6 dynamics of machinery Question Paper 2019 (jun)
Practice authentic previous year university questions for better exam preparation.
Sample Questions
- What is meant by the principle of virtual work?
- Compare static and dynamic force analysis. List the advantages of static force analysis.
- Describe the turning moment diagram of a four stroke petrol engine with a sketch.
- Derive the expression for the coefficient of fluctuation of energy of a flywheel.
- Define sensitiveness and isochronism of centrifugal governors.
- Derive an expression for the governor effort.
- Explain the gyroscopic stabilization of ships.
- What is meant by partial primary balancing? Explain.
- Define: Natural frequency, resonance and damping.
- Draw the schematic of an accelerometer and explain its working.
- Determine the input torque on a slider crank mechanism for static equilibrium when the applied piston load is 2000 N . The length of the connecting rod is 100 mm and that of crank is 50 mm . The crank has turned through $45^{\circ}$ from the inner de...
- A punching press makes 40 mm holes in a plate of 30 mm thick at the rate of 4 holes per minute. It requires $6 \mathrm{~N}-\mathrm{m}$ of energy per sq. mm area Stroke of punch is 100 mm . Flywheel rpm varies from 320 to 280 . If the radius of gyrati...
- The moment of inertia of rotating parts of an aeroplane is 20 kg -sqm and is spinning anticlockwise looking from front. Aeroplane is taking a right turn of 200 m radius. Flight speed is $100 \mathrm{~m} / \mathrm{sec}$. Find the gyroscopic couple and...
- Calculate minimum, maximum and range of speed of a porter governor with equal arms of 200 mm and pivoted at the axis of rotation. Mass of each ball is 4 kg and that of sleeve is 20 kg . Radius of rotation is 100 mm when the governor begins to lift an...
- A rotor is mounted midway on a shaft of 1 m span. Rotor mass is 10 kg and shaft diameter is 2.5 cm . Centre of gravity of disc is .1 mm out. If the speed is 3000 rpm calculate the frequency of steady state vibrations and the dynamic force transmitted...
- A vibrating system consists of a central mass of 6.5 kg , a spring of stiffness $\mathrm{k}=100 \mathrm{~N} / \mathrm{m}$, a damper with $\mathrm{c}=3 \mathrm{~N} \mathrm{sec} / \mathrm{m}$. Find out (a) logarithmic decrement
- A vibrating system consists of a central mass of 6.5 kg , a spring of stiffness $\mathrm{k}=100 \mathrm{~N} / \mathrm{m}$, a damper with $\mathrm{c}=3 \mathrm{~N} \mathrm{sec} / \mathrm{m}$. Find out (b) the damping factor
- A vibrating system consists of a central mass of 6.5 kg , a spring of stiffness $\mathrm{k}=100 \mathrm{~N} / \mathrm{m}$, a damper with $\mathrm{c}=3 \mathrm{~N} \mathrm{sec} / \mathrm{m}$. Find out (c) natural frequency of damped vibration
- A vibrating system consists of a central mass of 6.5 kg , a spring of stiffness $\mathrm{k}=100 \mathrm{~N} / \mathrm{m}$, a damper with $\mathrm{c}=3 \mathrm{~N} \mathrm{sec} / \mathrm{m}$. Find out (d) ratio between two consecutive amplitudes $$ \...