b) 2.0 * Beam Engine (Crank and lever mechanism)
If they make a profit of Rs 10,000 at the end of the year, what should be the share of Narendra ? Has both sliding and turning pairs One is a turning pair and three are sliding pairs, C). One is a turning pair and three are sliding pairs, Three are turning pairs and one is a sliding pair, Two are turning pairs and two are sliding pairs, For automatic adjustment of belt position so that belt runs centrally, The relation between number of links (l) and number of joints (j) in a kinematic chain is, Under logarithmic decrement, the amplitude of successive vibrations are, When the load on the engine increases, it becomes necessary to increase the supply of working fluid and when the load decreases, less working fluid is required.
A pair of friction discs is an example of rolling pair. a. It is, usually, found in reciprocating steam engine mechanism. For an involute gear, the ratio of base circle radius and pitch circle radius is equal to, 3. Lead screwin lathe: For providing feedto the slides * Oscillating cylinder engine
a) 2, 4, 5 and 6
AE & JE Civil Engg. b) 2 perpendicular to the link = 3600 1200 = 2400 A can finish a work in 24 days, B in 9 days and C in 12 days. At the end of the year the total profit earned was Rs 90,000. If they make a profit of Rs 10,000 at the end of the year, what should be the share of Narendra ? After 8 months Nitish joined with a capital of Rs 45,000. (iv) slider acceleration is maximum 5. a) parallel to the link c) 4k/m Prerna decided to donate 15% of her salary to an orphanage. The equation of motion for a vibrating system with viscous damping is , if the roots of the equation are complex conjugate, then the system will be critically damped. 1. General Knowledge & Awareness for All AE/JE Exams - Special Live Test, Copyright 2014-2022 Testbook Edu Solutions Pvt. The crankshaft of reciprocating engine having a 20 cm crank and 100 cm connecting rod rotates at 210 r.p.m. The partial balancing of reciprocating parts in locomotives produces, A rotor which is balanced statically but not dynamically is supported on two bearings L apart and at high speed of the rotor, reaction on the left bearing is R. The right side of the bearing is shifted to a new position 2 L apart from the left bearing.
View Answer, 7. c) 2 and 3 6.
A planar four-bar linkage mechanism with 3 revolute kinematic pairs and 1 prismatic kinematic pair is shown in the figure, where AB CE and FD CE. B and C start the work but are forced to leave after 3 days. View Answer, 3. View Answer, 9. * Pendulum pump or Bull engine Narendra started a business, investing Rs 30,000. b) 30 m/s2 and direction is such as to rotate slider velocity in the opposite sense as the angular velocity For the given lengths as shown, the mechanism is, When the kinematic pairs are coupled in such a way that the last link is joined to the first link to transmit definite motion and completely or successfully constrain motion, it is called a -.
Narendra started a business, investing Rs 30,000. B and C start the work but are forced to leave after 3 days. * double slider crank chain In a slider-crank mechanism, the slider is at its dead centre position when the Six months later, Chandan joined him with Rs 15,000.
If they save Rs 2000 each, what is the income of A ? xZ[sH~wC?C_lg25CXB% LgQ:~wo?WW-"1eBYd5?fwW$,Q[u,~}gxoIN | x,In[!]gPlf$]1H.A 1. 10. The Coriolis acceleration component of a point on the slider relative to a coincident point on the link is equal to On the day of donation she changed her mind and donated Rs 1896, which was 80% of what she had decided earlier. At the end of the year the total profit earned was Rs 90,000. a) 1 and 4 d. How much is Prerna's salary. View Answer. How much is Prerna's salary. * Scotch yoke mechanism. Consider the following statements: d) 45 2 0 obj The link with 0 degrees of freedom in a four-bar system is known as which of the following? Compressor 2. Which is not the example of higher pair from various kinematic pairs? Crank and slotted lever quick return motion mechanism. This type of mechanism converts rotary motion into reciprocating motion. In vibration isolation system, the transmissibility will be equal to unity, for all values of damping factor, if /n is. On the day of donation she changed her mind and donated Rs 1896, which was 80% of what she had decided earlier. b) 90 The shaking force transmitted to the frame of the mechanism is given by.
endobj the ratio of the time taken on the cutting and return strokes is According to law of gearing, the common normal at the point of contact between a pair of teeth must always pass through the pitch point. The ratio of angular speeds of the driven (F) to the driver (A) of the drive is. b) Beam engine where T1, T2 , T3 and T4 are numbers of teeth on gears 1, 2, 3 and 4 respectively. b. If they save Rs 2000 each, what is the income of A ? The average age of a class is 15.8 years. View Answer. In a four bar chain or quadric cycle chain, one is a turning pair and three are sliding pairs, two are turning pairs and two are sliding pairs, three are turning pairs and one is a sliding pair. There are six gears A, B, C, D, E and F in a compound train. The simplest and the basic kinematic chain is a four-bar chain or quadric cycle chain, as shown in Figure. 4. List-I The frictional torque transmitted in a multi-collared shaft is same as that of a single collared shaft. d) 19m/s Six months later, Chandan joined him with Rs 15,000. ~\+BKs;9 7. Sanfoundry Global Education & Learning Series Machine Kinematics. Welcome to the largest collection of MCQs on the Internet. This set of Machine Kinematics Multiple Choice Questions & Answers focuses on Four Bar Chain or Quadric Cycle Chain. 3. In the configuration of the planar four-bar mechanism at a certain instant as shown in the figure, the angular velocity of the 2 cm long link is 2 = 5 rad/s. List-II Mechanically correct in all positions b) 1, 2, 3 and 6 a) 1.5
Quick return ratio = / = 240/120 = 2. (i) slider velocity is zero 2. XT(r2$\ /YEN fg.QV+UYq T |e>#e\r `p*NPq?O>(#M'ha7yfit;S:/+63Q, LG|pix&^sgz#O1. The kinematic chain is a combination of four or more kinematic pairs, such that the relative motion between the links or elements is completely constrained. 1. When the crank angle is 45o, the velocity of piston is nearly c) 2, 3, 5 and 6 Access and Discuss these Multiple choice questions for various competitive Exams and Interviews. The ratio of the income of A to that of B is 5 : 7 and the ratio of their expenditures is 3 : 5. When a mass of a critically damped single degree of freedom system is deflected from its equilibrium position and released, then it will. Exams Previous Year Papers Mock Test (90+ Papers), The line of action or pressure line of meshing spur gear pair is. * elliptical trammel * Whitworth quick return motion mechanism. therefore, Vp = 21.980 x 0.2(sin45o + sin90o/2 x 5) Two are turning pairs and two are sliding pairs, D). b) 1 and 3 In a crank and slotted lever type quick return mechanism, the link moves with an angular velocity of 20 rad/s, while the slider moves with the linear velocity of 1.5 m/s. d) 2 and 4 * Crank and slotted lever quick return motion mechanism. Mathematically not accurate except in three positions.
After 8 months Nitish joined with a capital of Rs 45,000. 1. and with a decreasing load at 980 r.p.m. Sy8L,c.&->E %%l.#V/)=m^!LfHj2m4S\MZ)ZPj@}g,'4FSQ O#^ (iii) slider acceleration is zero %PDF-1.7 * Watt's indicator mechanism (Double lever mechanism), The mechanism in which two are turning pairs and two are sliding pairs, is called 4. b) 2k/m View Answer, 4. 1 0 obj 2. Controls movement of two front wheels c) 2.2 3 0 obj Which of the following pairs of devices and their functions are correctly matched? View Answer, 8. View Answer, 6. The critical speed of a shaft in revolution per second is __________ as that of natural frequency of transverse vibration. The inversions of a single slider crank chain are found in the following mechanisms. All Rights Reserved. Prerna decided to donate 15% of her salary to an orphanage. In a four bar chain or quadric cycle chain, A). 4 0 obj Fixtures: For locating work-piece and guiding tools (ii) slider velocity is maximum d) 2 parallel to the link here is complete set of 1000+ Multiple Choice Questions and Answers, Prev - Machine Kinematics Questions and Answers Types of Kinematic Chains, Next - Machine Kinematics Questions and Answers Inversions of Four Bar Chain, Machine Kinematics Questions and Answers Inversions of Four Bar Chain, Machine Kinematics Questions and Answers Single Slider Crank Chain and its Inversions 2, Machine Kinematics Questions and Answers Double Slider Crank Chain & its Inversions, Machine Kinematics Questions and Answers Single Slider Crank Chain and its Inversions 1, Machine Kinematics Questions and Answers Kinematic Chain, Machine Kinematics Questions and Answers Mechanism 2, Machine Kinematics Questions and Answers Chain Drives, Machine Kinematics Questions and Answers Types of Kinematic Chains, Machine Kinematics Questions and Answers Acceleration of a Point on a Link, Machine Kinematics Questions and Answers Belt, Rope and Chain Drives. If the rotating mass of a rim type flywheel is distributed on another rim type flywheel whose mean radius is half the mean radius of the former, then energy stored in the latter at the same speed will be, In a band and block brake, the ratio of tensions on tight side and slack side of the band is (where = Coefficient of friction between the blocks and the drum, = Semi-angle of each block subtending at the centre of drum, and n = Number of blocks), The dedendum circle diameter is equal to (where = Pressure angle), Financial Management and Financial Markets. a) k/m The magnitude and direction of Coriolis component of acceleration with respect to angular velocity are The supply of the working fluid to the engine is controlled by a. What is the share of Nitish ? 5. In a locomotive, the maximum magnitude of the unbalanced force along the perpendicular to the line of stroke, is known as. c) 120 The wear of bearing is proportional to velocity and pressure. d) 2.93 The T-shaped link CDEF is constructed such that the slider B can cross the point D, and CE is sufficiently long. How long will they take if both work together. 4. Has only turning pairs 6. To practice all areas of Machine Kinematics, here is complete set of 1000+ Multiple Choice Questions and Answers. Oscillating cylinder engine, In a four-bar mechanism, the sum of the lengths of shortest and longest links is less than the sum of other two links. 2011-2022 Sanfoundry. The instantaneous centre between pinion and gear wheel in a gear set mechanism shown below is located at, An engine at half load begins to act with an increasing load at 970 r.p.m. The inversions of four bar chain are as follows. The number of instantaneous centres of rotation for a 10-link kinematic chain is 2. c) 60 m/s2 and direction is such as to rotate slider velocity in the same sense as the angular velocity a) 30 m/s2 and direction is such as to rotate slider velocity in the same sense as the angular velocity The average age of the boys is 16.4 years while that of the girls is 15.4 years, what is the ratio of boys to girls in the class. If the shortest link is fixed, then the mechanism will act as.
Single slider crank chain is a modification of the four bar chain. The average age of the boys is 16.4 years while that of the girls is 15.4 years, what is the ratio of boys to girls in the class. Less friction and hence long life 3. Anil can do a work in 15 days while Sunil can do it in 25 days. 8. <>/Metadata 76 0 R/ViewerPreferences 77 0 R>> Ltd.: All rights reserved, Match List-I (Kinematic inversions of slider-crank mechanism) with List-II (Applications) and select the correct answer using the codes given below the lists : What is the share of Nitish ? Which of the above statements are correct? b) 1.9m/s The ratio of the income of A to that of B is 5 : 7 and the ratio of their expenditures is 3 : 5. Anil can do a work in 15 days while Sunil can do it in 25 days. a) Elliptic trammels The speed ratio of the fourth gear to the first gear in a compound gear train (gear 2 and gear 3 are mounted on the same shaft) as shown below is A can finish a work in 24 days, B in 9 days and C in 12 days. Prince started a business investing Rs 30,000. Which of the following cam follower motion functions is required to be zero velocity, zero acceleration and zero jerk at the both ends of rise and fall segments of a double-dwell cam? Given the dimensions as shown, the magnitude of the angular velocity4 of the 4 cm long link is given by rad/s (round off to 2 decimal places). 2500 each. endobj One is a turning pair and three are sliding pairs, Two are turning pairs and two are sliding pairs, Three are turning pairs and one is a sliding pair, Four bar chain or Quadric cycle chain consists of four links, each of them forms a turning pair. The remaining work was done by A in. * Coupling rod of a locomotive (Double crank mechanism) Which of the following refers to the collection ofparticles, whose relativedistances are constant? c. 3. d) 60 m/s2 and direction is such as to rotate slider velocity in the opposite sense as the angular velocity. The masses and accelerations of the mass centres of crank, connecting rod and slider of a slider-crank mechanism are m1, m2, m3 and a1, a2, a3 respectively. 4. c) 3.5m/s The frictional torque transmitted in a flat pivot bearing, assuming uniform wear, is(Where = Coefficient of friction, W=Load over the bearing, R=Radius of bearing), 2. A helical coil spring of stiffness k is cut to two equal halves and then these are connected in parallel to support a vibrating mass m. The angular frequency of vibration, n is Which one of the following mechanisms is an inversion of double slider-crank chain? He sold them, gaining 5% on one and having a loss of 4% on the other. The average age of a class is 15.8 years. Governors: For controlling speeds <> Exams Previous Year Papers Mock Test (100+ Papers), AE & JE Mechanical Engg. % Whitworth quick return mechanism d) k/4m At the same rotor speed, dynamic reaction on the left bearing in the new arrangement will, If /n is very high for a body vibrating under steady state vibrations, the phase angle for all values of damping factors, will tend to approach, When the belt is stationary, it is subjected to some tension known as initial tension. In a crank and slotted lever quick-return motion, the distance between the fixed centres is 150 mm and the length of the driving crank is 75mm. c) perpendicular to the link The relation between number of pairs (P) forming a kinematic chain and the number of links (l) is -. 9. The frictional torque transmitted in a flat pivot bearing, assuming uniform wear, is(Where = Coefficient of friction, W=Load over the bearing, R=Radius of bearing), For an involute gear, the ratio of base circle radius and pitch circle radius is equal to, In vibration isolation system, the transmissibility will be equal to unity, for all values of damping factor, if /n is. therefore, = 1200 When a particle moves round the circumference of a circle of radius r with rad/s, then its maximum acceleration is r. a) 1.8m/s The instantaneous centres, which moves as the mechanism moves but joints are of permanent nature, are called permanent instantaneous centres. = 3.5m/sec. The numbers of teeth in the gears are 20, 60, 30, 80, 25 and 75 respectively. <>/ExtGState<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 612 792] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> 3u, `G'k> ~L{gwEu?M@6`tp=!>QS ghr6Ov]lj6JfM2pDi44p=&cL;Be(7L a) 36 A slider moves with uniform velocity on a revolving link of length r with angular velocity . Three are turning pairs and one is a sliding pair, 1.
endobj Prince started a business investing Rs 30,000. The remaining work was done by A in. Which of the following are associated with Ackerman steering mechanism used in automobiles? * Rotary internal combustion engine or Gnome engine. Single slider crank chain consists of one sliding pair and three turning pairs. Select the correct answer using the codes given below.
The value of this tension is equal to the. Hand pump Each of the four pairs is a turning pair, B). The sensitivity of the governor is, Hari purchased two watches for Rs. d) Coupling rod of a locomotive <> View Answer, 5. d) 1, 2, 3 and 5 stream Flywheel: For storing kinetic energy The gear train usually employed in clocks is a. His gain/loss percent in the whole transaction is, One turning pair and the others are sliding pairs, One sliding pair and the others are turning pairs. c) Oscillating cylinder engine How long will they take if both work together?
A planar four-bar linkage mechanism with 3 revolute kinematic pairs and 1 prismatic kinematic pair is shown in the figure, where AB CE and FD CE. B and C start the work but are forced to leave after 3 days. View Answer, 3. View Answer, 9. * Pendulum pump or Bull engine Narendra started a business, investing Rs 30,000. b) 30 m/s2 and direction is such as to rotate slider velocity in the opposite sense as the angular velocity For the given lengths as shown, the mechanism is, When the kinematic pairs are coupled in such a way that the last link is joined to the first link to transmit definite motion and completely or successfully constrain motion, it is called a -.
Narendra started a business, investing Rs 30,000. B and C start the work but are forced to leave after 3 days. * double slider crank chain In a slider-crank mechanism, the slider is at its dead centre position when the Six months later, Chandan joined him with Rs 15,000.
If they save Rs 2000 each, what is the income of A ? xZ[sH~wC?C_lg25CXB% LgQ:~wo?WW-"1eBYd5?fwW$,Q[u,~}gxoIN | x,In[!]gPlf$]1H.A 1. 10. The Coriolis acceleration component of a point on the slider relative to a coincident point on the link is equal to On the day of donation she changed her mind and donated Rs 1896, which was 80% of what she had decided earlier. At the end of the year the total profit earned was Rs 90,000. a) 1 and 4 d. How much is Prerna's salary. View Answer. How much is Prerna's salary. * Scotch yoke mechanism. Consider the following statements: d) 45 2 0 obj The link with 0 degrees of freedom in a four-bar system is known as which of the following? Compressor 2. Which is not the example of higher pair from various kinematic pairs? Crank and slotted lever quick return motion mechanism. This type of mechanism converts rotary motion into reciprocating motion. In vibration isolation system, the transmissibility will be equal to unity, for all values of damping factor, if /n is. On the day of donation she changed her mind and donated Rs 1896, which was 80% of what she had decided earlier. b) 90 The shaking force transmitted to the frame of the mechanism is given by.
endobj the ratio of the time taken on the cutting and return strokes is According to law of gearing, the common normal at the point of contact between a pair of teeth must always pass through the pitch point. The ratio of angular speeds of the driven (F) to the driver (A) of the drive is. b) Beam engine where T1, T2 , T3 and T4 are numbers of teeth on gears 1, 2, 3 and 4 respectively. b. If they save Rs 2000 each, what is the income of A ? The average age of a class is 15.8 years. View Answer. In a four bar chain or quadric cycle chain, one is a turning pair and three are sliding pairs, two are turning pairs and two are sliding pairs, three are turning pairs and one is a sliding pair. There are six gears A, B, C, D, E and F in a compound train. The simplest and the basic kinematic chain is a four-bar chain or quadric cycle chain, as shown in Figure. 4. List-I The frictional torque transmitted in a multi-collared shaft is same as that of a single collared shaft. d) 19m/s Six months later, Chandan joined him with Rs 15,000. ~\+BKs;9 7. Sanfoundry Global Education & Learning Series Machine Kinematics. Welcome to the largest collection of MCQs on the Internet. This set of Machine Kinematics Multiple Choice Questions & Answers focuses on Four Bar Chain or Quadric Cycle Chain. 3. In the configuration of the planar four-bar mechanism at a certain instant as shown in the figure, the angular velocity of the 2 cm long link is 2 = 5 rad/s. List-II Mechanically correct in all positions b) 1, 2, 3 and 6 a) 1.5
Quick return ratio = / = 240/120 = 2. (i) slider velocity is zero 2. XT(r2$\ /YEN fg.QV+UYq T |e>#e\r `p*NPq?O>(#M'ha7yfit;S:/+63Q, LG|pix&^sgz#O1. The kinematic chain is a combination of four or more kinematic pairs, such that the relative motion between the links or elements is completely constrained. 1. When the crank angle is 45o, the velocity of piston is nearly c) 2, 3, 5 and 6 Access and Discuss these Multiple choice questions for various competitive Exams and Interviews. The ratio of the income of A to that of B is 5 : 7 and the ratio of their expenditures is 3 : 5. When a mass of a critically damped single degree of freedom system is deflected from its equilibrium position and released, then it will. Exams Previous Year Papers Mock Test (90+ Papers), The line of action or pressure line of meshing spur gear pair is. * elliptical trammel * Whitworth quick return motion mechanism. therefore, Vp = 21.980 x 0.2(sin45o + sin90o/2 x 5) Two are turning pairs and two are sliding pairs, D). b) 1 and 3 In a crank and slotted lever type quick return mechanism, the link moves with an angular velocity of 20 rad/s, while the slider moves with the linear velocity of 1.5 m/s. d) 2 and 4 * Crank and slotted lever quick return motion mechanism. Mathematically not accurate except in three positions.
After 8 months Nitish joined with a capital of Rs 45,000. 1. and with a decreasing load at 980 r.p.m. Sy8L,c.&->E %%l.#V/)=m^!LfHj2m4S\MZ)ZPj@}g,'4FSQ O#^ (iii) slider acceleration is zero %PDF-1.7 * Watt's indicator mechanism (Double lever mechanism), The mechanism in which two are turning pairs and two are sliding pairs, is called 4. b) 2k/m View Answer, 4. 1 0 obj 2. Controls movement of two front wheels c) 2.2 3 0 obj Which of the following pairs of devices and their functions are correctly matched? View Answer, 8. View Answer, 6. The critical speed of a shaft in revolution per second is __________ as that of natural frequency of transverse vibration. The inversions of a single slider crank chain are found in the following mechanisms. All Rights Reserved. Prerna decided to donate 15% of her salary to an orphanage. In a four bar chain or quadric cycle chain, A). 4 0 obj Fixtures: For locating work-piece and guiding tools (ii) slider velocity is maximum d) 2 parallel to the link here is complete set of 1000+ Multiple Choice Questions and Answers, Prev - Machine Kinematics Questions and Answers Types of Kinematic Chains, Next - Machine Kinematics Questions and Answers Inversions of Four Bar Chain, Machine Kinematics Questions and Answers Inversions of Four Bar Chain, Machine Kinematics Questions and Answers Single Slider Crank Chain and its Inversions 2, Machine Kinematics Questions and Answers Double Slider Crank Chain & its Inversions, Machine Kinematics Questions and Answers Single Slider Crank Chain and its Inversions 1, Machine Kinematics Questions and Answers Kinematic Chain, Machine Kinematics Questions and Answers Mechanism 2, Machine Kinematics Questions and Answers Chain Drives, Machine Kinematics Questions and Answers Types of Kinematic Chains, Machine Kinematics Questions and Answers Acceleration of a Point on a Link, Machine Kinematics Questions and Answers Belt, Rope and Chain Drives. If the rotating mass of a rim type flywheel is distributed on another rim type flywheel whose mean radius is half the mean radius of the former, then energy stored in the latter at the same speed will be, In a band and block brake, the ratio of tensions on tight side and slack side of the band is (where = Coefficient of friction between the blocks and the drum, = Semi-angle of each block subtending at the centre of drum, and n = Number of blocks), The dedendum circle diameter is equal to (where = Pressure angle), Financial Management and Financial Markets. a) k/m The magnitude and direction of Coriolis component of acceleration with respect to angular velocity are The supply of the working fluid to the engine is controlled by a. What is the share of Nitish ? 5. In a locomotive, the maximum magnitude of the unbalanced force along the perpendicular to the line of stroke, is known as. c) 120 The wear of bearing is proportional to velocity and pressure. d) 2.93 The T-shaped link CDEF is constructed such that the slider B can cross the point D, and CE is sufficiently long. How long will they take if both work together. 4. Has only turning pairs 6. To practice all areas of Machine Kinematics, here is complete set of 1000+ Multiple Choice Questions and Answers. Oscillating cylinder engine, In a four-bar mechanism, the sum of the lengths of shortest and longest links is less than the sum of other two links. 2011-2022 Sanfoundry. The instantaneous centre between pinion and gear wheel in a gear set mechanism shown below is located at, An engine at half load begins to act with an increasing load at 970 r.p.m. The inversions of four bar chain are as follows. The number of instantaneous centres of rotation for a 10-link kinematic chain is 2. c) 60 m/s2 and direction is such as to rotate slider velocity in the same sense as the angular velocity a) 30 m/s2 and direction is such as to rotate slider velocity in the same sense as the angular velocity The average age of the boys is 16.4 years while that of the girls is 15.4 years, what is the ratio of boys to girls in the class. If the shortest link is fixed, then the mechanism will act as.
Single slider crank chain is a modification of the four bar chain. The average age of the boys is 16.4 years while that of the girls is 15.4 years, what is the ratio of boys to girls in the class. Less friction and hence long life 3. Anil can do a work in 15 days while Sunil can do it in 25 days. 8. <>/Metadata 76 0 R/ViewerPreferences 77 0 R>> Ltd.: All rights reserved, Match List-I (Kinematic inversions of slider-crank mechanism) with List-II (Applications) and select the correct answer using the codes given below the lists : What is the share of Nitish ? Which of the above statements are correct? b) 1.9m/s The ratio of the income of A to that of B is 5 : 7 and the ratio of their expenditures is 3 : 5. Anil can do a work in 15 days while Sunil can do it in 25 days. a) Elliptic trammels The speed ratio of the fourth gear to the first gear in a compound gear train (gear 2 and gear 3 are mounted on the same shaft) as shown below is A can finish a work in 24 days, B in 9 days and C in 12 days. Prince started a business investing Rs 30,000. Which of the following cam follower motion functions is required to be zero velocity, zero acceleration and zero jerk at the both ends of rise and fall segments of a double-dwell cam? Given the dimensions as shown, the magnitude of the angular velocity4 of the 4 cm long link is given by rad/s (round off to 2 decimal places). 2500 each. endobj One is a turning pair and three are sliding pairs, Two are turning pairs and two are sliding pairs, Three are turning pairs and one is a sliding pair, Four bar chain or Quadric cycle chain consists of four links, each of them forms a turning pair. The remaining work was done by A in. * Coupling rod of a locomotive (Double crank mechanism) Which of the following refers to the collection ofparticles, whose relativedistances are constant? c. 3. d) 60 m/s2 and direction is such as to rotate slider velocity in the opposite sense as the angular velocity. The masses and accelerations of the mass centres of crank, connecting rod and slider of a slider-crank mechanism are m1, m2, m3 and a1, a2, a3 respectively. 4. c) 3.5m/s The frictional torque transmitted in a flat pivot bearing, assuming uniform wear, is(Where = Coefficient of friction, W=Load over the bearing, R=Radius of bearing), 2. A helical coil spring of stiffness k is cut to two equal halves and then these are connected in parallel to support a vibrating mass m. The angular frequency of vibration, n is Which one of the following mechanisms is an inversion of double slider-crank chain? He sold them, gaining 5% on one and having a loss of 4% on the other. The average age of a class is 15.8 years. Governors: For controlling speeds <> Exams Previous Year Papers Mock Test (100+ Papers), AE & JE Mechanical Engg. % Whitworth quick return mechanism d) k/4m At the same rotor speed, dynamic reaction on the left bearing in the new arrangement will, If /n is very high for a body vibrating under steady state vibrations, the phase angle for all values of damping factors, will tend to approach, When the belt is stationary, it is subjected to some tension known as initial tension. In a crank and slotted lever quick-return motion, the distance between the fixed centres is 150 mm and the length of the driving crank is 75mm. c) perpendicular to the link The relation between number of pairs (P) forming a kinematic chain and the number of links (l) is -. 9. The frictional torque transmitted in a flat pivot bearing, assuming uniform wear, is(Where = Coefficient of friction, W=Load over the bearing, R=Radius of bearing), For an involute gear, the ratio of base circle radius and pitch circle radius is equal to, In vibration isolation system, the transmissibility will be equal to unity, for all values of damping factor, if /n is. therefore, = 1200 When a particle moves round the circumference of a circle of radius r with rad/s, then its maximum acceleration is r. a) 1.8m/s The instantaneous centres, which moves as the mechanism moves but joints are of permanent nature, are called permanent instantaneous centres. = 3.5m/sec. The numbers of teeth in the gears are 20, 60, 30, 80, 25 and 75 respectively. <>/ExtGState<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 612 792] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> 3u, `G'k> ~L{gwEu?M@6`tp=!>QS ghr6Ov]lj6JfM2pDi44p=&cL;Be(7L a) 36 A slider moves with uniform velocity on a revolving link of length r with angular velocity . Three are turning pairs and one is a sliding pair, 1.
endobj Prince started a business investing Rs 30,000. The remaining work was done by A in. Which of the following are associated with Ackerman steering mechanism used in automobiles? * Rotary internal combustion engine or Gnome engine. Single slider crank chain consists of one sliding pair and three turning pairs. Select the correct answer using the codes given below.
The value of this tension is equal to the. Hand pump Each of the four pairs is a turning pair, B). The sensitivity of the governor is, Hari purchased two watches for Rs. d) Coupling rod of a locomotive <> View Answer, 5. d) 1, 2, 3 and 5 stream Flywheel: For storing kinetic energy The gear train usually employed in clocks is a. His gain/loss percent in the whole transaction is, One turning pair and the others are sliding pairs, One sliding pair and the others are turning pairs. c) Oscillating cylinder engine How long will they take if both work together?