SSC JE Exam - simple machines four bar linkage flywheels power transmission belts clutches gears governors cams bearings Online Test (MCQ Quiz)

1. Which of the following is the most fundamental example of a simple machine?

A) Pulley B) Lever C) Wheel and Axle D) Inclined Plane

2. A four-bar linkage consists of how many links and joints?

A) 3 links, 3 joints B) 4 links, 4 joints C) 5 links, 5 joints D) 3 links, 4 joints

3. Which type of four-bar linkage has one link completely rotating relative to another link?

A) Grashof linkage B) Watt's linkage C) Rocker-rocker linkage D) Drag-link mechanism

4. What is the primary function of a flywheel in an engine?

A) To increase the power output B) To reduce fuel consumption C) To smooth out fluctuations in speed D) To initiate the engine's rotation

5. The moment of inertia of a flywheel is a measure of its:

A) Resistance to linear motion B) Resistance to angular acceleration C) Ability to store kinetic energy D) Tendency to change its mass

6. Which of the following is NOT a type of power transmission belt?

A) V-belt B) Flat belt C) Timing belt D) Chain belt

7. The ratio of the tight side tension to the slack side tension in a belt drive is known as the:

A) Coefficient of friction B) Velocity ratio C) Belt tension ratio D) Power transmission ratio

8. A clutch is a device used to connect or disconnect:

A) Two rotating shafts B) A rotating shaft and a stationary component C) A linear motion and a rotary motion D) Two stationary components

9. Which type of clutch uses friction material to transmit torque?

A) Jaw clutch B) Fluid clutch C) Centrifugal clutch D) Friction clutch

10. Gears are used to transmit power between shafts that are:

A) Always parallel B) Always intersecting C) Always non-parallel and non-intersecting D) Can be parallel, intersecting, or non-parallel and non-intersecting

11. The number of teeth on a gear divided by the number of teeth on its pinion is called the:

A) Pitch diameter ratio B) Module C) Gear ratio D) Addendum

12. A governor is a device used to regulate the:

A) Speed of an engine B) Torque of an engine C) Pressure in a hydraulic system D) Temperature of a machine

13. Which type of governor uses centrifugal force to control the engine speed?

A) Hartnell governor B) Porter governor C) Proell governor D) All of the above

14. A cam is a rotating or oscillating machine element which transforms motion by directly engaging with a:

A) Shaft B) Gear C) Follower D) Bearing

15. The path traced by the follower as the cam rotates is called the:

A) Cam profile B) Pitch curve C) Base circle D) Trace

16. Which type of follower reciprocates in a direction parallel to the cam's axis of rotation?

A) Radial follower B) Oscillating follower C) Translating follower D) In-line follower

17. A bearing is a machine element that constrains relative motion to only the desired motion and reduces friction between moving parts. What is its primary function?

A) To increase friction B) To transmit power C) To reduce friction D) To generate heat

18. Which of the following is a type of rolling-contact bearing?

A) Journal bearing B) Thrust bearing C) Ball bearing D) Fluid bearing

19. In a simple lever, the effort arm is the distance between the fulcrum and the:

A) Load B) Effort C) Fulcrum D) Work done

20. A Class 1 lever has the fulcrum positioned:

A) Between the effort and the load B) At one end, with effort and load on the other end C) At one end, with load between fulcrum and effort D) At one end, with effort between fulcrum and load

21. Which specific type of four-bar linkage is used in the steering mechanism of most automobiles?

A) Watt's linkage B) Roberts linkage C) Ackermann steering mechanism D) Grashof linkage

22. The energy stored in a flywheel due to its rotation is:

A) Potential energy B) Kinetic energy C) Chemical energy D) Thermal energy

23. A flywheel's effectiveness in reducing speed fluctuations depends on its mass and its:

A) Diameter B) Shape C) Moment of inertia D) Material

24. Which belt drive system allows for a change in speed ratio by using stepped pulleys?

A) Flat belt drive B) V-belt drive C) Timing belt drive D) Variable speed belt drive

25. The maximum angle through which the cam rotates while the follower is in contact with the nose of the cam is called the:

A) Angle of ascent B) Angle of dwell C) Angle of descent D) Angle of action

26. A sprag clutch is a type of clutch that allows rotation in only one direction. This is also known as a:

A) Overrunning clutch B) Centrifugal clutch C) Jaw clutch D) Friction clutch

27. What is the primary advantage of a worm gear drive?

A) High efficiency B) Self-locking capability C) Ability to transmit power between parallel shafts D) High speed reduction ratio

28. The sensitivity of a governor is defined as the ratio of the range of speed to the:

A) Mean speed B) Maximum speed C) Minimum speed D) Operating speed

29. In a cam-follower mechanism, the displacement of the follower is a function of the cam's:

A) Diameter B) Material C) Angular position D) Weight

30. Which type of bearing uses a fluid film to separate the moving surfaces?

A) Ball bearing B) Roller bearing C) Plain bearing D) Fluid bearing

31. A simple machine that consists of a grooved wheel on an axle, used to change the direction of a force or to gain mechanical advantage is a:

A) Lever B) Inclined plane C) Pulley D) Wedge

32. In a Grashof linkage, the condition for it to be a Grashof mechanism is that the sum of the longest and shortest link lengths must be less than the sum of the other two link lengths. If this condition is met, what is a possible motion?

A) Rocker-rocker B) Double-crank C) Crank-rocker D) All of the above

33. The coefficient of fluctuation of speed for a flywheel is defined as the ratio of the difference between maximum and minimum speeds to the:

A) Maximum speed B) Minimum speed C) Average speed D) Operating speed

34. Which of the following is a disadvantage of belt drives?

A) They are quiet in operation B) They require precise alignment C) They can slip under heavy loads D) They are relatively efficient

35. A cone clutch is a type of friction clutch where the friction surfaces are shaped like:

A) Cylinders B) Spheres C) Cones D) Plates

36. Bevel gears are used to transmit power between shafts that are:

A) Parallel B) Intersecting C) Non-parallel and non-intersecting D) Coaxial

37. Which governor is characterized by a parabolic path of the balls?

A) Porter governor B) Proell governor C) Hartnell governor D) Wilson-Hartnell governor

38. A 'dwell' period in a cam mechanism refers to a phase where the follower:

A) Moves upwards B) Moves downwards C) Remains stationary D) Oscillates

39. Which type of bearing is characterized by a high load-carrying capacity and is suitable for heavy radial loads?

A) Ball bearing B) Needle roller bearing C) Cylindrical roller bearing D) Spherical roller bearing

40. A wheelbarrow is an example of which class of lever?

A) Class 1 B) Class 2 C) Class 3 D) None of the above

41. In a slider-crank mechanism, which link is typically fixed?

A) Crank B) Connecting rod C) Slider D) Frame

42. The 'period of fluctuation of energy' in a flywheel is related to the:

A) Maximum torque produced B) Minimum torque produced C) Work done during one cycle of fluctuation D) Average power output

43. Which type of belt is known for its positive drive, meaning it does not slip?

A) Flat belt B) V-belt C) Timing belt D) Rawhide belt

44. An 'involute' profile is commonly used for the teeth of which machine element?

A) Cam B) Gear C) Pulley D) Flywheel

45. Which of the following is a characteristic of a Watt governor?

A) It has a longer range of speed control than a Porter governor for the same height. B) It is more sensitive than a Porter governor. C) It has a higher equilibrium speed than a Porter governor for the same height. D) It uses a dead weight.

46. A cam mechanism where the follower moves in a circular arc is called a:

A) Translating cam B) Oscillating cam C) Radial cam D) Worm and wheel cam

47. Which of the following is a type of sliding-contact bearing?

A) Ball bearing B) Roller bearing C) Journal bearing D) Needle bearing

48. In a Class 3 lever, the effort is always:

A) Less than the load B) Greater than the load C) Equal to the load D) Variable relative to the load

49. Which of the following is a disadvantage of using cams for motion transmission?

A) High speed capability B) Complex manufacturing C) Ability to produce complex motions D) Low noise operation

simple machines four bar linkage flywheels power transmission belts clutches gears governors cams bearings - Online Test

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