B.TECH - Semester 5 theory of machines Question Paper 2020 (feb)
Practice authentic previous year university questions for better exam preparation.
- (a) Draw the kinematic diagram for the mechanism shown in Figure 1. Determine the degrees of freedom for this linkage. Figure 1
- (b) Determine the mobility for the mechanism in Figure 4. Figure 4
- (b) Find the angular position of links 3 and 4 assuming Figure 2 is drawn roughly to scale. Also, determine the $(x, y)$ location of point $P$ assuming the origin is located at Ao. Assume the following parameters: $\mathrm{L}_{1}=115 \mathrm{~mm}, \mathrm{~L}_{2}=40.0 \mathrm{~mm}, \mathrm{~L}_{3}=1...
- (a) Find the angular position of link 3 and the linear position of link 4 (point D ) relative to the origin at Ao assuming Figure 3 is drawn roughly to scale. Assume $\mathrm{L}_{1}=95.0 \mathrm{~mm}, \mathrm{~L}_{2}=65.0 \mathrm{~mm}, \mathrm{~L}_{3}=85.0 \mathrm{~mm}, \theta_{1}=270^{\circ}, \thet...
- What is the relationship between number of pairs and number of Links?
- What is link?
- Write the equation for Grubler's criterion to a plane mechanism.
- State the conditions for self-energizing brakes and self-locking brakes.
- What are the advantages of helical gears over spur gear?
- What is undercutting in cam? write its significance
- What are the disadvantages of V-belt drive over flat belt drive? Answer any one full questions from each Module.
- A $\vee$ Belt having an angle of lap of $180^{\circ}$ has cross-sectional area of $250 \mathrm{~mm}^{2}$ and it runs in a groove of angle $45^{\circ}$. The density of belt material is $1.5 \mathrm{gm} / \mathrm{cc}$. The maximum stress is limited to $4 \mathrm{~N} / \mathrm{mm}^{2}$. The coefficient...
- What is kutchbach criterion?
- What is a reverted gear train?
- State the law of gearing.
- Draw the velocity diagram for the mechanism shown in Figure 5. Determine the velocity of the ram ' $E$ ' for the given position, if crank OA rotates uniformly at 150 $\mathrm{rpm} . \mathrm{OA}=150 \mathrm{~mm} ; \mathrm{AB}=550 \mathrm{~mm} ; \mathrm{BE}=350 \mathrm{~mm} ; \mathrm{AC}=450 \mathrm{~...
- The driving crank of a quick-return mechanism shown in Figure 6 rotates at 120 rpm in clockwise direction. For the position shown, determine the magnitude and direction of the velocity of the block D and angular velocity of slotted bas QB . Take, $\mathrm{CD}=500 \mathrm{~mm} ; \mathrm{QC}=150 \math...
- The following data relate to a cam profile in which the follower moves with cycloidal motion during the lift and returning it with uniform acceleration and deceleration, acceleration being half the deceleration: | Minimum radius of cam | $=30 \mathrm{~mm}$ | | :--- | :--- | | Roller radius | $=10 \...
- The fixed internal gear B in the epicyclic gear train shown in Figure 7 has 92 teeth. The wheels C and D have 25 and 15 teeth respectively. The wheel E has 52 teeth. The arm makes 260 rpm and transmits 0.5 kW . Calculate: (a) the speed of E
- The fixed internal gear B in the epicyclic gear train shown in Figure 7 has 92 teeth. The wheels C and D have 25 and 15 teeth respectively. The wheel E has 52 teeth. The arm makes 260 rpm and transmits 0.5 kW . Calculate: (b) the resisting torque on E and
- The fixed internal gear B in the epicyclic gear train shown in Figure 7 has 92 teeth. The wheels C and D have 25 and 15 teeth respectively. The wheel E has 52 teeth. The arm makes 260 rpm and transmits 0.5 kW . Calculate: (c) the holding torque on B. Figure 7 Gear Train
- The block shown in Figure 8 is set by a spring that produces a force $S$ on each arm equal to 3.5 kN . The wheel diameter is 350 mm and the angle of contact for each block is $120^{\circ}$. Coefficient of friction is 0.35 . Determine the maximum torque that the brake is capable of absorbing. Figure...
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