Multiple choice question of machine design

 Multiple choice question of machine design

Machine design mcq

Quiz

 

1. A spring used to absorb shocks and vibrations is...?
   
   1.   Disc spring
   2.   Torsional Spring
   3.   Leaf spring
   4.   Conical spring
2. Which one of the following is used to convert a rotational motion into a translational motion....?
   1.   Bevel gears
   2.   Rack and pinion gears
   3.   Double helical gears
   4.   Worm gears
3. For an Oldham coupling used between two shafts, which among the following statements are correct...?
   I. Torsional load is transferred along shaft axis.
   II. A velocity ratio of 1:2 between shafts is obtained without using gears
   III. Bending load is transferred transverse to shaft axis.
   IV. Rotation is transferred along shaft axis.
   1.   I and II
   2.   II and III
   3.   I and IV
   4.   II and IV
4. Which one of the following can completely balance several masses revolving in different planes on a shaft..?
   1.   Two equal masses in any two planes
   2.   Two masses in any two planes
   3.   A single mass in one of the planes of the revolving masses
   4.   A single mass in different planes
5. The vibration damper on a crankshaft reduces the...?
   1.   Longitudinal vibrations
   2.   transverse vibrations
   3.   torsional vibrations
   4.   all of these
6. A Hartnell governor is a.....?
   
   1.   pendulum type
   2.   spring loaded type
   3.   dead weight type
   4.   inertia type
7. Pendulum pump is an inversion of.....?
   
   1.   Double slider crank chain
   2.   Four bar chain
   3.   Single slider crank chain
   4.   None of the above
8. In a pantograph, all the pairs are......?
   
   1.   Sliding pairs
   2.   Spherical pairs
   3.   Screw pairs
   4.   Turning pairs
9. In a kinematic chain, a quaternary joint is equivalent to....?
   
   1.   Four binary joints
   2.   Three binary joints
   3.   Two binary joints
   4.   One binary joint
10. The type of pair formed by two elements which are so connected that one is constrained to turn or revolve about a fixed axis of another element is known as..?
    
    1.   spherical pair
    2.   rolling pair
    3.   turning pair
    4.   lower pair
11. Any point on a link connecting double slider crank chain will trace a...?
    1.   straight line
    2.   circle
    3.   ellipse
    4.   ellipse
12. The purpose of a link is to....?
    
    1.   Transmit motion
    2.   Guide other links
    3.   act as a support
    4.   All of the above
13. Pitch point on a cam is.....?
    
    1.   the point on cam pitch curve having the minimum pressure angle
    2.   the point on cam pitch curve having the maximum pressure angle
    3.   any point on pitch circle
    4.   any point on pitch curve
14. The planes of spin, precession and applied gyroscopic couple are...?
    
    1.   the same one plane
    2.   two planes perpendicular to one another
    3.   three planes perpendicular to one another
    4.   none of the above
15. A gear train having the input and output gears mounted on the same axis is called...?
    1.   Reverted
    2.   Epicyclic
    3.   Compound
    4.   Simpl
16. The instantaneous centre of a slider moving on a curved surface lies at...?
    1.   Infinity
    2.   their point of contact
    3.   the centre of curvature of curved surface
    4.   the pin point
17. The function of which of the following Hydraulic device is analogous to that of flywheel of reciprocating engine and electric storage battery.
    1.   Hydraulic ram
       
       x
    2.   Hydraulic accumulator
    3.   Hydraulic intensifier
    4.   Combination of all above
18. The neutral axis of the cross-section of a beam is that axis at which the bending stress is....?
    1.   zero
    2.   minimum
    3.   maximum
    4.   infinite
19. Factor of safety is defined as the ratio of...?
    
    1.   working stress to ultimate stress
    2.   breaking stress to ultimate stress
    3.   ultimate stress to breaking stress
    4.   ultimate stress to working stress
20. The objective of 'crowning' of the flat pulleys of belt drive is to...?
    
    1.   prevent the belt joint from damaging the belt surface
    2.   prevent the belt from running off the pulley
    3.   increases the power transmission capacity
    4.   increase the belt velocity
21. The objective of idler pulley in belt drive is to...?
    
    1.   Change the direction of transmission
    2.   increase the wrap angle and belt tension
    3.   ncrease the power transmission capacity
    4.   all the above objectives
22. Dynamics of machine deals with....?
    
    1.   the relative motion between the parts neglecting the consideration of forces
    2.   the forces acting on the parts of the machines
    3.   the apparatus for applying mechanical power
    4.   the number of inter-related parts, each having a definite motion
23. Rope brake dynamometer uses...?
    
    1.   oil as lubricant
    2.   water as lubricant
    3.   grease as lubricant
    4.   no lubricant
24. Sensitiveness of the governor is defined as....?
    
    1.   Range of speed + mean speed/2
    2.   Mean of speed/range speed
    3.   Mean of speed × range speed
    4.   Range of speed/(2 × mean speed)
25. If a flywheel having mass of 100 kg and radius of gyration 100 cm is rotating at 10 rad/s, its rotational kinetic energy will be...?
    1.   5 KJ
    2.   10 KJ
    3.   15 KJ
    4.   20 KJ
26. The purpose of self-aligning bearing is to...?
    
    1.   Tolerate a small amount of misalignment between the axes of shaft and bearing
    2.   Tolerate a small amount of wear in the rolling elements for continuous operation
    3.   Tolerate the plastic deformation in rolling elements and cage.
    4.   Tolerate a small amount of temperature variation.
27. Antifriction bearings are...?
    
    1.   Collar bearing
    2.   Pedestal bearing
    3.   Needle bearing
    4.   Journal bearing
28. Partial balancing in locomotives results in...?
    
    1.   hammer blow, variation of tractive effort, swaying couple
    2.   least wear
    3.   most smooth operation
       better performance of engine
    4.   better performance of engine
29. The ratio of maximum displacement of the forced vibration to the deflection due to static force is known as...?
    1.   damping factor
    2.   damping coefficient
    3.   ogarithmic decrement
    4.   magnification factor
30. Which of the following parameters has higher value during whirling of a shaft...?
    1.   Speed
    2.   Acceleration
    3.   Amplitude
    4.   Frequency
31. In a damped vibration system, the damping force is proportional to...?
    1.   Displacement
    2.   Velocity
    3.   Acceleration
    4.   Vibrations
32. In forced vibration, the magnitude of the damping force at resonance equals to...?
    1.   Inertia force
    2.   Impressed force
    3.   Infinity
    4.   Zero
33. Whirling speed of a shaft coincides with the natural frequency of its...?
    1.   Longitudinal vibration
    2.   Transverse vibration
    3.   Torsional vibration
    4.   Coupled bending torsional vibration
34. The load carrying capacity of a hydrodynamically lubricated journal bearing depends on...?
    1.   Speed only
    2.   Viscosity only
    3.   Radial clearance only
    4.   Speed only
       Viscosity only
       
       Radial clearance only
       Speed, Radial clearance and Viscosity
35. In Concurrent Engineering, design and manufacturing are....?
    
    1.   Sequentially considered
    2.   Separately considered
    3.   Simultaneously considered
    4.   Independently considered
36. The design calculations for members subject to fluctuating loads with the same factor of safety yield the most conservative estimates when using...?
    1.   Gerber relation
    2.   Soderberg relation
    3.   Goodman relation
    4.   None of the above
37. The factor to be considered while designing a machine element is..?
    
    1.   Selection of the materials
    2.   Effect of environment
    3.   Selection of mechanism
    4.   All of the above
38. The co-efficient of friction for the clutch facing is approximately...?
    
    1.   0.1
    2.   0.4
    3.   0.8
    4.   1.2
39. In a involute gear, the normal to the involute is tangent to the....?
    
    1.   Pitch circle
    2.   Base circle
    3.   Addendum circle
    4.   Dedendum circle
40. The interference is cycloidal teeth....?
    
    1.   is absent completely
    2.   depends on number of teeth
       depends on condition of meshing
    3.   depends on number of teeth
    4.   depends on pressure angle
41. Brake fade is....?
    
    1.   Loss of hydraulic fluid
    2.   Loss of coefficient of friction
    3.   Loss of pedal
    4.   None of the above
42. Brake fluid used in hydraulic braking system should have …………
    1.   High viscosity
    2.   Low boiling point
    3.   High boiling point
    4.   Should have less stability
43. The effect of increasing the stiffness springs of centrifugal clutch is..?
    1.   The decrease of engagement speed
    2.   The increase of engagement speed
    3.   The increase of frictional force at maximum speed
    4.   None of the above
44. In gears, the contact ratio is the ratio of...?
    
    1.   length of path of contact to the circular pitch
    2.   length of arc of approach to the circular pitch
    3.   length of arc of recess to the circular pitch
    4.   length of arc of contact to the circular pitch
45. "Addendum" is defined as..?
    
    1.   The radius of addendum circle
    2.   The radial height of the tooth below the pitch circle
    3.   The radial height of the tooth above the pitch circle
    4.   It is the full depth of the tooth
46. The ratio of frictional torque produced for uniform wear to that for uniform pressure is..?
    
    1.   1
       2/3
       4/3
       3/4
    2.   2/3
    3.   4/3
    4.   3/4
47. The stress-concentration factor (K) is...?
    
    1.   Ratio of maximum stress occurring near discontinuity to average stress at critical section
    2.   Ratio of minimum stress occurring near discontinuity to average stress at critical section
    3.   Ratio of average stress at critical section to maximum stress occurring near discontinuity
    4.   Ratio of average stress at critical section to minimum stress occurring near discontinuity