B.TECH - Semester 5 theory of machines Question Paper 2021 (mar)
Practice authentic previous year university questions for better exam preparation.
Sample Questions
- Define the term kinematic chain with example.
- What is Grashoff's law?
- Explain briefly Geneva mechanism.
- What do you understand by the instantaneous centre of rotation in kinematic of machines? Answer briefly.
- What is Coriolis component of acceleration?
- Why a roller follower is preferred to that of a knife-edged follower?
- Define the term Circular pitch and module of the gear.
- Write down the expression of frictional torque on the pivot bearing when there is a uniform pressure.
- Derive the condition for transmitting the maximum power in a flat belt drive.
- How does the velocity ratio of a belt drive effect, when some slip is taking place between the belt and the two pulleys? Answer one full question from each module.
- (a) Explain any two inversions of Single Slider Crank Chain.
- (b) In a crank and slotted lever quick return motion mechanism, the distance between the fixed centres is 240 mm and the length of the driving crank is 120 mm . Find the inclination of the slotted bar with the vertical in the extreme position and the...
- The specification of position $\theta$, velocity $\omega$ and acceleration $\alpha$ as follows. Synthe-size a four bar linkage, as shown in Fig. using Freudensteins equation to satisfy in one of its positions. $$ \begin{array}{lll} \theta=60^{\circ}...
- Locate all the instantaneous centres of the slider crank mechanism as shown in Fig. The lengths of crank OB and connecting rod AB are 100 mm and 400 mm respectively. If the crank rotates clockwise with an angular velocity of $10 \mathrm{rad} / \mathr...
- A mechanism of a crank and slotted lever quick return motion is shown in Fig 3. If the crank rotates counter clockwise at 120 r.p.m., determine for the configuration shown the velocity and acceleration of the ram D Also determine the angular accelera...
- A Cam operating a knife-edged follower has the following data : (a) Follower moves outwards through 40 mm during $60^{\circ}$ of cam rotation. (b) Follower dwells for the next $45^{\circ}$ (c) Follower returns to its original position during next $90...
- Two mating spur gears have 20 and 40 involute teeth of module 10 mm and $20^{\circ}$ pressure angle. If the addendum on each wheel is such that the path of contact is maximum and interference is just avoided, find the addendum for each gear wheel, pa...
- A simple band brake is operated by a lever of length 500 mm . The brake drum has a diameter of 500 mm and the brake band embraces $5 / 8$ of the circumference. One end of the band is attached to the fulcrum of the ever while the other end is attached...
- A single plate clutch, effective on both sides, is required to transmit 25 kW at 3000 r.p.m. Determine the outer and inner radii of frictional surface if the coefficient of friction is 0.255 , the ratio of radii's 1.25 and the maximum pressure is not...