Discussion
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- Question
The two elements of a pair are said to form a __________ when they permit relative motion between them.
Options- A. open pair
- B. kinematic pair
- Correct Answer
- kinematic pair
- 1. The sliding pairs, turning pairs and screw pairs form lower pairs.
Options- A. True
- B. False Discuss
- 2. A pair of friction discs is an example of rolling pair.
Options- A. True
- B. False Discuss
- 3. The pressure angle of a cam is the angle between the direction of the follower motion and a normal to the
Options- A. pitch circle
- B. base circle
- C. pitch curve
- D. prime circle Discuss
- 4. A shaft has an attached disc at the centre of its length. The disc has its centre of gravity located at a distance of 2 mm from the axis of the shaft. When the shaft is allowed to vibrate in its natural bow-shaped mode, it has a frequency of vibration of 10 rad/s. When the shaft is rotated at 300 r.p.m., it will whirl with a radius of
Options- A. 2 mm
- B. 2.22 mm
- C. 2.50 mm
- D. 3.0 mm Discuss
- 5. The primary unbalanced force is maximum when the angle of inclination of the crank with the line of stroke is
Options- A. 0° and 90°
- B. 0° and 180°
- C. 90° and 180°
- D. 180° and 360° Discuss
- 6. The electrodes used in spot welding have a tip of
Options- A. stainless steel
- B. aluminium
- C. copper
- D. brass Discuss
- 7. The blank diameter used in thread rolling will be
Options- A. equal to minor diameter of the thread
- B. equal to pitch diameter of the thread
- C. a little larger than the minor diameter of the thread
- D. a little larger than the pitch diameter of the thread Discuss
- 8. Metal patterns are used for
Options- A. small castings
- B. large castings
- C. complicated castings
- D. large scale production of castings Discuss
- 9. The draft or taper allowance on casting is generally
Options- A. 1 to 2 mm/m
- B. 2 to 5 mm/m
- C. 5 to 10 mm/m
- D. 10 to 15 mm/m Discuss
- 10. A taper provided on the pattern for its easy and clean withdrawl from the mould is known as
Options- A. machining allowance
- B. draft allowance
- C. shrinkage allowance
- D. distortion allowance Discuss
Theory of machines problems
Search Results
Correct Answer: True
Correct Answer: False
Correct Answer: pitch curve
Correct Answer: 2.22 mm
Correct Answer: 0° and 180°
Correct Answer: copper
Correct Answer: a little larger than the minor diameter of the thread
Correct Answer: large scale production of castings
Correct Answer: 1 to 2 mm/m
Correct Answer: draft allowance
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