3. 78.

34. Surface contact between the two elements when in motion, C. Elements of pairs not -held together mechanically, D. Two elements that permit relative motion, 3. Whitworth quick return mechanism is obtained by inversion of, 8.

Which of the following is an inversion of four bar kinematic chain? Oldhams coupling is used to connect two shafts which are, B. Fixing different links in a kinematic chain, C. Changing a higher pair to a lower pair. A closed 4-bar chain having 2 revolute and 2 sliding pairs, A closed 4-bar chain having 2 revolute and 2 sliding pairs, 4. AB and CD are both perpendicular to the fixed link AD. Answer:A 5.Voltage equation of a dc motor is----- ((A)) V = Eb + IaRa ((B)) Eb = V + IaRa ((C))V = Eb /IaRa ((D))V = Eb + Ia2Ra Hide ! A. of links of a slider crank mechanism = 4 So there are four inversion of slider crank mechanism. Complexity is managed through abstraction. The centre of the disc has centripetal acceleration, c. The contact point of the disc has zero acceleration, d. The centre of the disc has zero acceleration, 60. Kliens construction can be used when, A. Crank has a uniform angular velocityB.

Subject to the condition 3l-2j-4=0 and it satisfy this condition.

The two links OA and OB are connected by a pin joint at O.

The total number of instantaneous centres of a mechanism having 6 links is, 57.

89. N coincides with Od. D`Alemberts principal Dynamic-static analysis ((A))Series motor ((B))Shunt motor ((C))Cumulatively compound motor ((D), NEW Unit III STRUCTURING OF PROGRAM MULTIPLE CHOICE QUESTIONS 1. Transmission angle is minimum when crank angle with the fixed link is. ((MARKS)) (1/2/3) 1 ((QUESTION)) The wrapping up of data and functions into a single unit is ((OPTION_A)) Data Abstraction ((OPTION_B)) Data Encapsulation ((OPTION_C)) Both (a) & (b) ((OPTION_D)) None of the above. When the link slider moves on fixed link having straight surface, the instantaneous centre lies at, 55.

93. 2. 80.

To get more questions visit other sections. 21. Beam engine mechanism is an example of this inversion and it consists of four links. AD is the fixed link.

The l/r ratio will be, 32.

In a mechanism, usually one link is fixed.

Which of the following mechanisms produces mathematically an exact straight line motion?

1. The magnitude of linear velocity of a point B on a link AB relative to point A is, 48.

The lengthsof the links of a 4-bar linkage with revolute pairs only are p, q, r, and s Given that p < q < r < s.Which of these links should be the fixed one, for obtaining a double crank mechanism?

An inversion of the single slider-crank chain, An inversion of the single slider-crank chain. If the link OA turns with angular velocity 1 rad/s in the clockwise direction and the link OB turns with angular velocity 2 rad/s in the anti-clockwise direction, then the rubbing velocity at the pin joint O is, 50. Grublers criterion Mobility (for plane mechanism) D. Yes, if any link adjacent to shortest link is fixed. If n links are connected at the same joint, the joint is equivalent to ___________ binary joints. MCQ: What is the function of a moderator? _______________ is the simplest type of motion and is along a straight line path. Identify the mechanism shown in the figure. A point on a link connecting double slider crank chain traces a, 4. The instantaneous centres which vary with the configuration of the mechanism, are called, c. Neither fixed nor permanent instantaneous centres, 45. In kinematic chain, a quaternary joint is equivalent to. Kleins velocity diagramc.

94. ABCD is a four-bar mechanism. 4. Gruebler's criterion assumes mobility of a planar mechanism to be one.

Beam Engine is an inversion of _______ mechanism. Each Section contains maximum 70 questions. The acceleration of a particle at any instant has two components, radial component and tangential component.

Crank has uniform angular velocity and angular acceleration, 73. With respect to the figure given quadrilateral CQNO is known as _______, a. Kleins acceleration diagramb. The number of links in pantograph mechanism is equal to.

Kennedys theorem Velocity and acceleratio, The extreme position of the crank (O1P) are shown in figure. Which of these mechanisms gives an approximately straight line? If OC is the crank and PC is the connecting rod of a reciprocating steam engine and rotates with uniform angular velocity in clockwise direction in the given figure below: then under which condition the piston will undergo retardation? How can I pick out the best product from those listed on this site?guangduanpresses.com/product/forge-press, EEE Unit-1 DC Machines MCQ's MULTIPLE CHOICE QUESTIONS ON UNIT 1: DC MACHINES Edit 1.The sole purpose of a Commutator in a dc generator is to------- ((A))increase output voltage ((B)) reduce sparking at brushes ((C)) provide smoother output ((D)) convert the induced ac into dc Hide !

In case of instantaneous centre of rotation, a) Only three rigid links have no linear velocities relative to each other, b) Two rigid links rotate instantaneously relative to each other, d) The two rigid links have no linear velocities relative to each other at the instantaneous centre, 49. engines is low, due to ____, Electrical Engineering Questions 6089 MCQs, Electronic Engineering Questions 2261 MCQs, Mechanical Engineering Questions 3958 MCQs, mcqsbank.teswesm.com Copyright 2020. 97. Grashof's rule states that for a planar crank-rocker four bar mechanism, the sum of the shortest and longest link lengths cannot be less than the sum of the remaining two link lengths.

Which of the following is an inversion of single-slider-crank chain? If a slider moves with a velocity v on a link revolving at angular velocity , the magnitude of Coriolis component of acceleration is, 68. a. N lies to the left of Ob.

A thin circular disc rolls on a plane surface along a straight path with a uniform speed.

____________ mechanism was used in early days as an engine mechanism which gave long stroke with a very short crank? a.

a) plane motionb) rectilinear motionc) curvilinear Motiond) none of the mentioned.

70. The space centrode of a circular disc rolling on a straight path is.

Shaft in a footstep bearing is an example of _________ motion. Acceleration of the piston P is maximum and its velocity is zero. _________________ is the motion along a curved path. Match the approaches given below to perform stated kinematics/dynamics analysis of machine.

A point B on a rigid link AB moves with respect to A with angular velocity rad/s. When the elements of the pair are kept in contact by the action of external forces, the pair is to be a ___________.

The Grublers criterion for determining the degrees of freedom (n) is equal to, 39. At least one of the three moving links will rotate by 360 if, When a cylinder is located in a Vee-block, the number of degrees of freedom which are arrested is, The mechanism used in a shaping machine is. N is above Od. According to Grashoffs Law for a four bar mechanism, the sum of shortest and longest linklengths should not be greater than the sum of the remaining two link length. 99.

Answer : D 2.In a dc generator, the generated emf is directly proportional to the------ ((A)) field current ((B)) pole flux ((C)) number of armature parallel paths ((D)) number of dummy coils Hide ! For a slider, the direction of velocity of sliding is_____, 65. In a four-link mechanism, the sum of the shortest and the longest links is less than the sum of the other two links. Geneva mechanism is an intermittent motion device. 90. In machines, relative motion exists be-tween its members, whereas same does not exist in case of structures, C. Machines modify movement and work, whereas structures transmit forces, D. Machine and Structure both gives desired work. 91. The crank rotates about a fixed centre and the lever oscillates at another fixed centre. 100. 61.

The locus of instantaneous centre of a moving body relative to a fixed body is known as, 58. 16.

No explanation is given for this question, In the below figure, PC is the connecting rod and OC is the crank making an angle with the line of stroke PO and rotates with uniform angular velocity at rad/s. Identify the mechanism shown in the figure. Which of these is the functionality of Encapsulation?

33.

The total acceleration of B with respect to A will be equal to, a) vector sum of radial component and coriolis component, b) vector sum of tangential component and coriolis component, c) vector sum of radial component and tangential component, d) vector difference of radial component and tangential component, 53. Crank and lever mechanism: This is the first inversion of four bar chain. Acceleration and velocity of the piston P is maximum, C. Inversions of a mechanism are created-by fixing different links one at a time. When the two links are connected by a pin joint (or pivot joint), the instantaneous centre lies at, 56. Identify the mechanism shown in the figure. If the radius of the crank O1P is 125 mm, then the distance 'd' (in mm) between the crank centre to lever pivot centre point should be, A planar mechanism has 8 links and 10 rotary joints. ((OPTION_A)) Data Encapsulation ((OPTION_B)) Inheritance ((OPTION_C)) Polymorphism ((OPTION_D)) None of the above ((CORRECT_CHOICE)) (A/B/C/D) D ((EXPLANATION)) (OPTIONAL) Class, object, encapsulation, inheritance, polymorphism, data hiding, abstraction are all features of object oriented programming Sinhgad Institute of Technology Department of Computer Engineering Subject-PPL(210254) MCQ- Unit-4 Java as object oriented programming Language-Overview . 2.

11. 4. The coriolis component of acceleration is taken into account for, 54. MCQ: One ton of refrigeration is equal to ______. 37. In a four-link mechanism, the sum of the shortest and the longest links is less than the sum of the other two links. In given figure, Triangle OCM is known as ________.

Which of the following is an inversion of double slider crank chain? When a slider moves on a fixed link having curved surface, their instantaneous centres lies, 46.

20. A quick-return mechanism is an inversion of, 40. Gruebler's criterion assumes mobility of a planar mechanism to be one. The relation between the number of pairs (p) forming a kinematic chain and the number of links (l) is, A. point or line contact between the two elements when in motion, B. surface contact between the two elements when in motion, C. elements of pairs not held together mechanically, D. two elements that permit relative motion, 7.

Your email address will not be published. ((A))low ((B))zero ((C))positive ((D))negative Hide ! Transmission angle is the angle between the, 31. Identify the mechanism shown in the figure.

The number of links in Roberts mechanism is equal to. 25. Remain in the same place for all configurations of the mechanism, b. 15.

Degree of freedom is given by.

Inversions of a mechanism are created-by fixing different links one at a time. (adsbygoogle = window.adsbygoogle || []).push({}); According to _______ law for a four bar mechanism, for continuous relative motion, the sum of lengths of the shortest and longest link should not be greater than sum of lengths of other two links. Which of the following is an unclosed or open pair? It should be lesser or equal, i.e. The Klien's acceleration diagram for determining the acceleration of the piston P is shown by quadrilateral CQNO, if N coincides with O, then, The Coriolis component of acceleration leads the sliding velocity by.

Scotch yoke mechanism is used to convert rotary motion into, If crank is fixed in single slider crank chain, we get, The oscillating cylinder engine can be obtained by fixing, Multiple Choice Questions on Business Management, MCQ on Refrigeration and air conditioning, Online Multiple Choice Questions (MCQ) Tests, Multiple Choice Questions (MCQ) on Cold working of metals, Theory of Machines Objective Questions and Answers, B.tech First / Second Semester Question Papers. Angular acceleration of a link AB is given by, 64.

Machines transmit mechanical work, whereas structures transmit forces, B. ABCD is a four-bar mechanism in which AB = 310 mm and CD = 450mm.

3.

The total instantaneous centres for a mechanism consisting of n links are, 42. (a) Reduce Complexity (b) Binds together code and data (c) Parallelism (d) None of the mentioned Answer : a Explanation : An essential element of Object Oriented Programming is Data Abstraction which means hiding things.

The mechanism that was used to guide the piston rod in a cylinder for early steam engines is. Geneva mechanism is an intermittent motion device. Cam and follower has 3 links where 2 are lower and 1 higher pair, it has DOF of 1.

MCQ: Pump transfers input mechanical energy of an engine, into ______, MCQ: Thermal efficiency of S.I. When the end point of a link moves with constant angular velocity, its acceleration will have only, 67.

3.

It is used to convert rotary motion of input link into oscillatory motion of output link. opposite to each other, 74.

The mechanism forms a structure, when the number of degrees of freedom is equal to, 41. (c) Reduce Complexity (d) All of the mentioned Answer : a Explanation : Encapsulation acts as protective wrapper that prevents code and data from being accessed by other code defined outside the, ((MARKS)) (1/2/3) 1 ((QUESTION)) Which of the following is not the feature of OOPs? AB = 30 mm, BC = 50 mm, CD = 60 mm and AD = 70 mm. Which of the following is double lever mechanism? Crank has uniform angular accelerationD. Which of the following mechanism is used to enlarge or reduce the size of a drawing? inclined at 450d.

92.

26. In a four-bar linkage, if the lengths of shortest, longest and the other two links are denoted by s, l, p and q, then it would result in Grashofs linkage provided that, 38.

A. 2. D. Yes, if any link adjacent to shortest link is fixed, 23. Which of the following is an inversion of double slider-crank chain? Save my name, email, and website in this browser for the next time I comment. The crank and lever mechanism will produce. The component of the acceleration, parallel to the velocity of the particle, at the given instant is called, 52. N lies to the left of Oc. ((A))series ((B))shunt((C))compound ((D))high Hide ! The component of the acceleration directed toward the centre of rotation of a revolving body is known as _____________ component. The Scott-Russell mechanism consists of, 83. Parallel to the link joining the points, b. Perpendicular to the link joining the points, c. At 45 to the link joining the points, d. At 120 to the link joining the points, 47. Answer:B 3.An ideal dc generator has . voltage regulation. In a four-link mechanism, the sum of the shortest and the longest links is less than the sum of the other two links. Will it act as a drag-crank mechanism? Powered byMcqs Bank, West Pakistan Civil Courts Ordinance 1962 - Mcqs, Trade Regulations And Industrial Policies Mcqs, The Meaning & Measurement of Economic Development Mcqs, The International Economy And Globalization Mcqs, The External Debt & Financial Crises Mcqs, The Balance of Payments & The National Economy Mcqs, The Aggregate Demand Aggregate Supply Model Mcqs, Telecommunication & Switching Systems Test Questions, Supply-Side Policies & Sources of Comparative Advantage Mcqs, Steam Boilers, Engines, Nozzles & Turbines Mcqs. 79. Will it act as a rocker-rocker mechanism? a. N lies to the right of Ob.

If the velocity of B at this condition is v. Then the velocity of C is, 81. perpendicular to each otherc. Kleins displacement diagramd. A simple quick return mechanism is shown in the figure. Required fields are marked *. The forward to return ratio of the quick return mechanism is 2: 1. Acceleration and velocity of the piston P is zero, B. In a slider-crank mechanism, considering the crank and the coupler as the two sides and the line of stroke as base of a triangle, the maximum area is obtained when the crank angle is 75.

Which of the following is false statement in respect of differences between machine and structure?

The direction of linear velocity of any point on a link with respect to another point on the same link is, a. Two parallel shafts with small distance between their shafts can be connected by, 30. The number of inversions for a slider crank mechanism is, In a four-bar linkage, S denotes the shortest link length, L is the longest link length, P and Q are the lengths of other two links. Transmission angle is maximum when crank angle with the fixed link is, 24. Grashoffs law Continuous relative rotation 29. 98. It is a ___________ mechanism. In the given figure, the velocity of piston is maximum under which of the following conditions? 88. A closed 6-bar chain having 6 revolute pairs, A closed 6-bar chain having 6 revolute pairs, 3. A body in motion will be subjected to coriolis acceleration when that body is, a) in plane rotation with variable velocityb) in plane translation with variable velocityc) in plane motion which is a resultant of plane translation and rotationd) restrained to rotate while sliding over another body, 77. C. Crank has uniform angular acceleration, D. Crank has uniform angular velocity and angular acceleration. The minimum number of links in a single degree-of-freedom planar mechanism with both higher and lower kinematic pairs is, The number degrees of freedom of a planar linkage with 8 links and 9 simple revolute joints is, Which of the following statements is incorrect. AB = 100 mm, BC = 150 mm, CD = 200 mm and AD = 175 mm.

All points on the disc have same velocity, b. From right triangle O2O1P1, we find that sin, Whatever may be the number of links and joints Grubler's criterion applies to mechanism with only single degree freedom. 1. 36. 71. Your email address will not be published. Acceleration of the piston P is zero and its velocity is maximum, D. 10. For a kinematic chain to be considered as mechanismA. N lies to the right of Oc. Which of the following mechanism is an exact straight line motion mechanism consisting of 0ne sliding pair? Answer: A 6.Which of the following motor has the constant speed? If the link OA turns with angular velocity 1 rad/s in the clockwise direction and the link OB turns with angular velocity 2 rad/s in the clockwise direction, then the rubbing velocity at the pin joint O is, 51. The cam and follower without a spring forms a ___________ pair. 95. Which of the following statements are correct for the motion? 96. Point or line contact between the two elements when in motion, B. These two components will be, a. parallel to each otherb. Kliens construction is used only for, 66. Answer:B 4.Which generator may have poorest voltage regulation? The coriolis component of acceleration acts, a) along the sliding surfaceb) perpendicular to the sliding surfacec) at 450to the sliding surfaced) parallel to the sliding surface, 75. 12.

If the opposite links of a four bar linkage are equal, the links will always form a. For Double crank mechanism Shortest link is fixed.Here shortest link is P.

59. Which of the following mechanisms produces mathematically an exact straight-line motion, 86. Which of the following mechanism is used to connect two parallel shaft when distance between them is small? Which of the following is the functionality of Data Abstraction? In a mechanism, the fixed instantaneous centres are those centres which, a. Identify the mechanism shown in the figure. The mechanism shown in the figure is a _______________ mechanism.

(a) Binds together code and data (b) Using single interface for general class of actions. Which of the following is an inversion of Single slider crank chain? MCQ: Beam engine mechanism is an example of. 22. Which of the following is an inversion of single slider crank chain? two links should be fixed, B. three pairs turning and one pair sliding, C. two pairs turning and two pairs sliding, D. one pair turning and three pairs sliding. 62. N lies above O. Can it act as a double crank mechanism? N is below O, 72. No.

A. S + L P + Q (where S and L are length of shortest and longest link, respectively). Bennets diagram, 69. MCQ: Which of the following protects penstock due to sudden variation of flow or velocity of water? In kinematic chain, a ternary joint is equivalent to, 19. The number of degrees of freedom of the mechanism, using Grubler's criterion, is. 13. If the fixed link is changed in a kinematic chain, then relative motion of other links, C. could change or remain unaltered depending on which link is fixed, 5. At an instant, if the angular velocity of a link is clockwise, then the angular deceleration will be, 63. All rights reserved. 1. The lead screw of a lathe with nut is a, 18.

28. In the following figure if OA x OB = constant, then, a) the locus of a point B will be a straight line, b) the locus of a point B will be a curved line.

Vary with the configuration of the mechanism, c. Moves as the mechanism moves, but joints are of permanent nature, d. There are no fixed instantaneous centres, 44.

Grashof's rule states that for a planar crank-rocker four bar mechanism, the sum of the shortest and longest link lengths cannot be less than the sum of the remaining two link lengths.

Crank has non-uniform velocityC. In a slider-crank mechanism, the velocity of the piston is maximum when, a. Crank and connecting rod are perpendicular to each other, b. Crank and connecting rod are in the same line, c. Crank is perpendicular to the line of stroke, d. Crank is at 120 with the line of stroke.

17.

The number of inversions for a slider-crank chain are. ABCD is a four-link mechanism. 87.

27. Identify the mechanism shown in the figure. Which of the following mechanisms is/are provided by Object Oriented Language to implement Object Oriented Model? C. Yes, if the link opposite to the shortest link is fixed.

The two links OA and OB are connected by a pin joint at O. In a crank and slotted lever mechanism, if the lengths of the crank and the fixed links are 100 mm and 200 mm respectively, what will be the ratio of cutting time to the return time?