B.TECH - Semester 6 dynamics of machinery Question Paper 2021 (dec)
Practice authentic previous year university questions for better exam preparation.
Sample Questions
- Answer all questions from PART - A.
- Answer one question each from Module I, II, III of PART - B PART - A
- Briefly describe the equilibrium condition of three-force member in static-force analysis.
- Discuss the application of D'Alembertz equation for the force analysis.
- What do you mean by 'the Crank effort' in connection with the engine force analysis?
- Discuss the terms 'the maximum fluctuation of speed' and 'the maximum fluctuation of energy' in connection with the analysis of a fly wheel.
- Compare the functions of a 'flywheel' and 'a governor' used with an engine.
- What is the importance of the angle of heel-' $Q$ ' for analyzing the stability of a two-wheel vehicle?
- What is meant by static and dynamic unbalance in machinery? How can the balancing be done?
- Distinguish between longitudinal, transverse and torsional vibrations.
- What is meant by Magnification factor in case of forced vibrations? On what factors does it depend?
- What is logarithmic decrement? Write the relation for the same. ( $10 \times 4=40$ Marks) P.T.O. PART - B
- For the mechanism shown in figure. determine the torque on the link $A B$ for the static equilibrium of the mechanism $$ \begin{aligned} & D C=35 \mathrm{~mm} \\ & D E=25 \mathrm{~mm} \\ & A B=20 \mathrm{~mm} \\ & B C=60 \mathrm{~mm} \\ & B E=45 \ma...
- The torque delivered by a two-stroke engine is represented by $T=(1000+300 \sin 2 \theta-500 \cos 2 \theta)$ N.m where $\theta$ is the angle turned by the crank from the inner-dead centre. The engine speed is 250 rpm . The mass of the flywheel is 400...
- The torque delivered by a two-stroke engine is represented by $T=(1000+300 \sin 2 \theta-500 \cos 2 \theta)$ N.m where $\theta$ is the angle turned by the crank from the inner-dead centre. The engine speed is 250 rpm . The mass of the flywheel is 400...
- The torque delivered by a two-stroke engine is represented by $T=(1000+300 \sin 2 \theta-500 \cos 2 \theta)$ N.m where $\theta$ is the angle turned by the crank from the inner-dead centre. The engine speed is 250 rpm . The mass of the flywheel is 400...
- The torque delivered by a two-stroke engine is represented by $T=(1000+300 \sin 2 \theta-500 \cos 2 \theta)$ N.m where $\theta$ is the angle turned by the crank from the inner-dead centre. The engine speed is 250 rpm . The mass of the flywheel is 400...
- A 4-wheeled trolley car has a total mass of 3000 kg . Each axle with its two wheels and gears has a total moment of inertia of $32 \mathrm{~kg} . \mathrm{m}^{2}$. Each wheel is of 450 mm radius. The centre distance between two wheels on an axle is 1....
- Four masses $A, B, C$ and $D$ are completely balanced. Masses $C$ and $D$ make angles of $90^{\circ}$ and $195^{\circ}$ respectively with that of mass $B$ is the counter-clockwise direction. The rotating masses have the following properties : $$ \be...
- Four masses $A, B, C$ and $D$ are completely balanced. Masses $C$ and $D$ make angles of $90^{\circ}$ and $195^{\circ}$ respectively with that of mass $B$ is the counter-clockwise direction. The rotating masses have the following properties : $$ \be...
- The moment of inertia of three rotors $A, B$ and $C$ are respectively $7.5 \mathrm{~kg} . \mathrm{m}^{2}$, $22.5 \mathrm{~kg} . \mathrm{m}^{2}$ and $12.5 \mathrm{~kg} . \mathrm{m}^{2}$. The distance between $B$ and $C$ is 4 m . The shaft is 40 mm in ...
- The moment of inertia of three rotors $A, B$ and $C$ are respectively $7.5 \mathrm{~kg} . \mathrm{m}^{2}$, $22.5 \mathrm{~kg} . \mathrm{m}^{2}$ and $12.5 \mathrm{~kg} . \mathrm{m}^{2}$. The distance between $B$ and $C$ is 4 m . The shaft is 40 mm in ...
- A shaft of 10 cm diameter is supported in short bearing 3 m apart and carries 3 discs weighing $1000 \mathrm{~N}, 1500 \mathrm{~N}$ and 750 N situated at $1 \mathrm{~m}, 2 \mathrm{~m}$ and 2.5 m from one of the bearings respectively as shown in the f...