MCQOPTIONS
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MCQOPTIONS
This section includes 141 Mcqs, each offering curated multiple-choice questions to sharpen your ENGINEERING SERVICES EXAMINATION (ESE) knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Quick return motion mechanism is typically used in which of the following machine? |
| A. | Open die forge |
| B. | Hydraulic press |
| C. | Shaper |
| D. | Lathe |
| Answer» D. Lathe | |
| 2. |
A pantograph is a device that reproduces a displacement |
| A. | On the same scale |
| B. | On any scale |
| C. | On reduced scale |
| D. | On enlarged scale |
| Answer» C. On reduced scale | |
| 3. |
In automobiles, Hooke's joint is used between which of the following? |
| A. | Clutch and a gear box |
| B. | Gearbox and differential |
| C. | Differential and wheels |
| D. | Flywheel and clutch |
| Answer» C. Differential and wheels | |
| 4. |
Davis steering gear consists of _____. |
| A. | Both sliding pairs and turning pairs |
| B. | Turning pairs |
| C. | Rolling pairs |
| D. | Higher pairs |
| Answer» B. Turning pairs | |
| 5. |
A Pantograph is a mechanism or kinematic arrangement comprising. |
| A. | a lower pair |
| B. | two lower pairs |
| C. | three lower pairs |
| D. | 10 links |
| Answer» C. three lower pairs | |
| 6. |
For a four-bar linkage in toggle position, the value of mechanical advantage is: |
| A. | 0 |
| B. | 0.5 |
| C. | 1 |
| D. | ∞ |
| Answer» E. | |
| 7. |
A compound mechanism will have which of the following number of links: |
| A. | 4 |
| B. | 5 |
| C. | 3 |
| D. | 2 |
| Answer» C. 3 | |
| 8. |
Match the approaches given below to perform stated kinematics / dynamics analysis of machine.AnalysisApproachP. Continuous relative rotation1. D’ Alembert’s principleQ. Velocity and acceleration2. Grubler’s criterionR. Mobility3. Grashoff’s lawS. Dynamic-static analysis4. Kennedy’s theorem |
| A. | P – 1, Q – 2, R – 3, S – 4 |
| B. | P – 3, Q – 4, R – 2, S –1 |
| C. | P – 2, Q – 3, R – 4, S –1 |
| D. | P – 4, Q – 2, R – 1, S –3 |
| Answer» C. P – 2, Q – 3, R – 4, S –1 | |
| 9. |
________ mechanism produces mathematically an exact straight line motion. |
| A. | Ackermann |
| B. | Peaucellier‘s |
| C. | Watt |
| D. | None of these |
| Answer» C. Watt | |
| 10. |
Number of degrees of freedom in a Ball and socket is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 0 |
| Answer» D. 0 | |
| 11. |
A 4-bar mechanism with all revolute pairs has link lengths lf = 20 mm, lin = 40 mm, lco = 50 mm and lout = 60 mm. The suffixes 'f', 'in', 'co' and 'out' denote the fixed link, the input link, the coupler and output link respectively. Which one of the following statements is true about the input and output links? |
| A. | Both links can execute full circular motion |
| B. | Both links cannot execute full circular motion |
| C. | Only the output link cannot execute full circular motion |
| D. | Only the input link cannot execute full circular motion |
| Answer» B. Both links cannot execute full circular motion | |
| 12. |
A system consisting of two particles moves on a plane. Then the degree of freedom is |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 6 |
| Answer» D. 6 | |
| 13. |
In a reciprocating engine, the force along the connecting rod FC isWhere FP = Force on piston, n = L/r, θ = Angle of crank from IDC |
| A. | \(\frac{{{F_P}}}{{\sqrt {{n^2} - {{\sin }^2}\theta } }}\) |
| B. | \(\frac{{{F_P}}}{{2\sqrt {{n^2} - {{\sin }^2}\theta } }}\) |
| C. | \(\frac{{n{F_P}}}{{2\sqrt {{n^2} - {{\sin }^2}\theta } }}\) |
| D. | \(\frac{{n{F_P}}}{{\sqrt {{n^2} - {{\sin }^2}\theta } }}\) |
| Answer» E. | |
| 14. |
A simple mechanism consists of 11 simple revolute joints and 9 links. What is the degree of freedom of the mechanism? |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 3 |
| Answer» D. 3 | |
| 15. |
______ type of valves are used in the hydraulic power steering system of automobiles. |
| A. | Pressure compensated |
| B. | Non pressure compensated |
| C. | Proportional control |
| D. | Mechanical servo |
| Answer» E. | |
| 16. |
A mechanism is shown below. The number of tertiary links and the DOF, respectively are: |
| A. | 2 : 3 |
| B. | 2 : 2 |
| C. | 3 : 2 |
| D. | 3 : 3 |
| Answer» E. | |
| 17. |
______ CANNOT be classified as inversion(s) of a single-slider crank mechanism. |
| A. | Whitworth quick-return mechanism |
| B. | Crank and slotted-lever mechanism |
| C. | Oscillating cylinder engine |
| D. | Elliptical trammel |
| Answer» E. | |
| 18. |
A ball and socket joint is example of _______ pair. |
| A. | Screw |
| B. | Spherical |
| C. | Turning |
| D. | Rolling |
| Answer» C. Turning | |
| 19. |
If the number of constraints are four, then degree of freedom will be- |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 3 |
| Answer» D. 3 | |
| 20. |
Consider the following statements:In a slider-crank mechanism, the slider is at its inner dead center position when the1. slider velocity is zero2. slider velocity is maximum3. slider acceleration is zero4. slider acceleration is maximumWhich of the above statements are correct |
| A. | 1 and 4 |
| B. | 1 and 3 |
| C. | 2 and 3 |
| D. | 2 and 4 |
| Answer» B. 1 and 3 | |
| 21. |
A simple quick return mechanism is shown in the figure. The forward to return ratio of the quick return mechanism is 2:1. If the radius of the crank O1P is 125 mm, then the distance’s’ (in mm) between the crank centre to lever pivot centre point should be. |
| A. | 144.3 |
| B. | 216.5 |
| C. | 240 |
| D. | 250 |
| Answer» E. | |
| 22. |
If ‘4’ number of links are connected at a joint. Then it will be equivalent to: |
| A. | 2 quaternary joints |
| B. | 1 binary joint |
| C. | 2 binary joints |
| D. | 3 binary joints |
| Answer» E. | |
| 23. |
A four-bar Chain has. |
| A. | All turning pairs |
| B. | One turning pair and the others are sliding pairs |
| C. | One sliding pair and the others are turning pairs |
| D. | All are sliding pairs. |
| Answer» B. One turning pair and the others are sliding pairs | |
| 24. |
Determine the number of degrees of freedom used in the analysis of the mechanical system of the below-mentioned Figure. |
| A. | 3 |
| B. | 7 |
| C. | 5 |
| D. | 4 |
| Answer» E. | |
| 25. |
A four-bar mechanism is shown below. For the mechanism to be a crank-rocker mechanism, the length of the link PQ can be |
| A. | 80 mm |
| B. | 200 mm |
| C. | 300 mm |
| D. | 350 mm |
| Answer» B. 200 mm | |
| 26. |
In a four-link mechanism, the sum of the shortest and the longest link is less than the sum of the other two links. It will act as a rocker-rocker mechanism if: |
| A. | the shortest link is fixed |
| B. | shortest and adjacent to the shortest both are fixed |
| C. | the link opposite to the shortest link is fixed |
| D. | any link adjacent to the shortest link is fixed |
| Answer» D. any link adjacent to the shortest link is fixed | |
| 27. |
Kinematics pairs are those which have two elements that |
| A. | are held together |
| B. | have line contact |
| C. | have surface contact |
| D. | permit relative motion |
| Answer» E. | |
| 28. |
Mobility of the shown mechanism is: |
| A. | 0 |
| B. | 2 |
| C. | 3 |
| D. | 1 |
| Answer» E. | |
| 29. |
Dynamics of machine deals with. |
| A. | The relative motion between the parts neglecting the consideration of forces |
| B. | The forces acting on the parts of the machines |
| C. | The apparatus for applying mechanical power |
| D. | The number of inter-related parts, each having a definite motion |
| Answer» C. The apparatus for applying mechanical power | |
| 30. |
In a plane mechanism, the total number of links is 4 and the number of turning pairs is 4. The degree of freedom of mechanism is |
| A. | 2 |
| B. | 1 |
| C. | 0 |
| D. | 3 |
| Answer» C. 0 | |
| 31. |
A round bar A passes through the cylindrical hole in B as shown in the given figure. Which one of the following statements is correct in this regard? |
| A. | The two links shown forms a kinematic chain |
| B. | The pair is completely constrained |
| C. | The pair has incomplete constrained |
| D. | The pair is successfully constrained |
| Answer» D. The pair is successfully constrained | |
| 32. |
A bolt and nut forms |
| A. | a turning pair |
| B. | spherical pair |
| C. | sliding pair |
| D. | screw pair |
| Answer» E. | |
| 33. |
Linear acceleration of slider in the slider-crank mechanism may be expressed as:(where, r = radius of the crank, l = length of the connecting rod and \(n = \frac{l}{r}\)) |
| A. | \(a = r{\omega ^2}\left[ {\cos \theta + \frac{{\sin 2\theta }}{n}} \right]\) |
| B. | \(a = r{\omega ^2}\left[ {\cos \theta + \frac{{\cos 2\theta }}{n}} \right]\) |
| C. | \(a = r{\omega ^2}\left[ {\sin \theta + \frac{{\sin 2\theta }}{n}} \right]\) |
| D. | \(a = r{\omega }\left[ {\cos \theta + \frac{{\cos 2\theta }}{n}} \right]\) |
| Answer» C. \(a = r{\omega ^2}\left[ {\sin \theta + \frac{{\sin 2\theta }}{n}} \right]\) | |
| 34. |
Mechanism which has more than four links is- |
| A. | Compound mechanism |
| B. | Planar mechanism |
| C. | Spatial mechanism |
| D. | Simple mechanism |
| Answer» B. Planar mechanism | |
| 35. |
Identify lower pairs. Select the most appropriate answer. |
| A. | ball and socket |
| B. | cam and follower |
| C. | piston and cylinder |
| D. | both (1) and (2) |
| Answer» D. both (1) and (2) | |
| 36. |
In crank and slotted link mechanism, the forward and return stroke angles used are |
| A. | 220° and 140° respectively |
| B. | 140° and 220° respectively |
| C. | 180° each |
| D. | 200° and 160° respectively |
| Answer» B. 140° and 220° respectively | |
| 37. |
In a four-bar mechanism, if the shortest link is fixed, the Mechanism obtained is known as: |
| A. | Double rocker Mechanism |
| B. | Six bar Mechanism |
| C. | Double Crank Mechanism |
| D. | Crank and rocker Mechanism |
| Answer» D. Crank and rocker Mechanism | |
| 38. |
In a kinematic chain, a tertiary joint is equivalent to: |
| A. | two binary joints |
| B. | four binary joints |
| C. | three binary joints |
| D. | one binary joints |
| Answer» B. four binary joints | |
| 39. |
Davis steering gear consists of __________ |
| A. | Sliding pairs |
| B. | Turning pairs |
| C. | Rolling pairs |
| D. | Higher pairs |
| Answer» B. Turning pairs | |
| 40. |
A planer mechanism has 8 links and 10 rotary joints. The number of degrees of freedom of the mechanism, using Grubler’s criterion is |
| A. | 0 |
| B. | 1 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 41. |
If the two links have a turning as well as sliding motion between them, then the kinematic pair is known as- |
| A. | Rolling pair |
| B. | Spherical pair |
| C. | Screw pair |
| D. | Closed pair |
| Answer» D. Closed pair | |
| 42. |
It is required to connect two parallel shafts, the distance between whose axes are small and variable. They can be coupled by |
| A. | Universal joint |
| B. | Knuckle joint |
| C. | Sleeve coupling |
| D. | Oldham coupling |
| Answer» E. | |
| 43. |
Consider the following motions:1. Piston reciprocating inside an engine cylinder.2. Motion of a shaft between foot-step bearingsWhich of the above can rightly be considered as successfully constrained motion? |
| A. | 1 only |
| B. | 2 only |
| C. | Both 1 and 2 |
| D. | Neither 1 nor 2 |
| Answer» D. Neither 1 nor 2 | |
| 44. |
A minimum number of links that can make a mechanism are: |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | None of these |
| Answer» C. 4 | |
| 45. |
Match the items in columns I and IIColumn IColumn II(P) Higher kinematic pair(1) Grubler’s equation(Q) Lower kinematic pair(2) Line contact(R) Quick return mechanism(3) Euler’s equation(S) Mobility of a linkage(4) Planer (5) Shaper (6) Surface contact |
| A. | P - 2 Q - 6 R - 4 S - 3 |
| B. | P - 6 Q - 2 R - 4 S – 1 |
| C. | P - 6 Q - 2 R - 5 S – 3 |
| D. | P - 2 Q - 6 R - 5 S - 1 |
| Answer» E. | |
| 46. |
Pendulum pump is an inversion of : |
| A. | Four bar chain |
| B. | Single slider crank chain |
| C. | Double slider crank chain |
| D. | None of the above |
| Answer» C. Double slider crank chain | |
| 47. |
A point on a link connecting a double slider crank chain will trace a/ an |
| A. | Straight line |
| B. | Hyperbola |
| C. | Parabola |
| D. | Ellipse |
| Answer» E. | |
| 48. |
Oldham’s coupling is used to connect two shafts which are |
| A. | Intersecting |
| B. | Parallel |
| C. | Perpendicular |
| D. | Co – axial |
| Answer» C. Perpendicular | |
| 49. |
Consider the Grubler’s criteria for the planar mechanism asF = 3 (n - 1) – 2l - hWhat does I represent in the above equation? |
| A. | Number of lower pairs |
| B. | Number of links |
| C. | Length of the longest links |
| D. | Number of mobile links |
| Answer» B. Number of links | |
| 50. |
_______ is an example of force closed pair. |
| A. | Circular shaft revolving inside a bearing |
| B. | Cam and follower pair |
| C. | Rectangular rod in a rectangular hole in a prism |
| D. | Lead screw and nut of a lathe |
| Answer» C. Rectangular rod in a rectangular hole in a prism | |