Machine Design problems
- 1. In radial cams, the follower moves
Options- A. in a direction perpendicular to the cam axis
- B. in a direction parallel to the cam axis
- C. in any direction irrespective of cam axis
- D. along the cam axis Discuss
Correct Answer: in a direction perpendicular to the cam axis
- 2. When screw threads are to be used in a situation where power is being transmitted in one direction only, then the screw threads suitable for this will be
Options- A. square threads
- B. acme threads
- C. knuckle threads
- D. buttress threads Discuss
Correct Answer: buttress threads
- 3. When a bolt is subjected to shock loading, the resilience of the bolt should be considered in order to prevent breakage at the
Options- A. head
- B. shank
- C. thread
- D. middle Discuss
Correct Answer: thread
- 4. In unilateral system of tolerance, the tolerance is allowed on
Options- A. one side of the actual size
- B. one side of the nominal size
- C. both sides of the actual size
- D. both sides of the nominal size Discuss
Correct Answer: one side of the nominal size
- 5. In a hydrodynamic lubricated bearing
Options- A. there is a thick film of lubricant between the journal and the bearing
- B. there is a thin film of lubricant between the journal and the bearing
- C. there is no lubricant between the journal and the bearing
- D. the lubricant is forced between the journal and the bearing, by external pressure Discuss
Correct Answer: there is a thick film of lubricant between the journal and the bearing
- 6. Stress concentration is caused due to
Options- A. variations in load acting on a member
- B. variations in properties of materials in a member
- C. abrupt change of cross-section
- D. all of these Discuss
Correct Answer: abrupt change of cross-section
- 7. In second type of levers,
Options- A. load is in between the fulcrum and effort
- B. effort is in between the fulcrum and load
- C. fulcrum is in between the load and effort
- D. none of these Discuss
Correct Answer: load is in between the fulcrum and effort
- 8. In order to avoid tearing of the plate at an edge, the distance from the centre line of the rivet hole to the nearest edge of the plate should be equal to (where d = Diameter of rivet hole)
Options- A. d
- B. 1.5 d
- C. 2 d
- D. 2.5 d Discuss
Correct Answer: 1.5 d
- 9. A plate with an elliptical hole in the centre, with semi-major axis (a) perpendicular to the direction of loading and semi-minor axis (b) along the direction of loading, is subjected to a pull P. The maximum stress induced at the edge of the hole is equal to (where ? = Stress for a plate with no hole i.e. nominal stress)
Options- A.
- B.
- C.
- D.
Discuss
Correct Answer:
- 10. The velocity of sliding __________ the distance of the point of contact from the pitch point.
Options- A. is directly proportional to
- B. is inversely proportional to
- C. is equal to cos ? multiplied by
- D. does not depend upon Discuss
Correct Answer: is directly proportional to
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