Discussion
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- Question
The centre distance between two meshing involute gears is equal to
Options- A.
- B.
- C.
- D.
- Correct Answer
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- 1. The ball bearings are provided with a cage
Options- A. to reduce friction
- B. to facilitate slipping of balls
- C. to prevent the lubricant from flowing out
- D. to maintain the balls at a fixed distance apart Discuss
- 2. Which of the following statement is wrong?
Options- A. The power transmitted by V-belts is less than flat belts for the same coefficient of friction, arc of contact and allowable tension in the belts
- B. The V-belt drive is used with large centre distance
- C. The V-belt may be operated in either direction with tight side of the belt at the top or bottom
- D. The ratio of driving tensions in V-belt drive is more than flat belt drives Discuss
- 3. A crankshaft is a __________ shaft.
Options- A. transmission
- B. machine Discuss
- 4. The load cup of a screw jack is made separate from the head of the spindle to
Options- A. enhance the load carrying capacity of the jack
- B. reduce the effort needed for lifting the working load
- C. prevent the rotation of load being lifted
- D. reduce the value of frictional torque Discuss
- 5. Surface endurance limit of gear material is dependent upon its
Options- A. elastic strength
- B. yield strength
- C. brinell hardness number
- D. toughness Discuss
- 6. The toughness of a material __________ when it is heated.
Options- A. increases
- B. decreases
- C. does not change Discuss
- 7. In a flange coupling, the flanges are coupled together by means of
Options- A. bolts and nuts
- B. studs
- C. headless taper bolts
- D. none of these Discuss
- 8. Which of the following material has the maximum ductility?
Options- A. Mild steel
- B. Copper
- C. Zinc
- D. Aluminium Discuss
- 9. According to Unwin's formula, the relation between the diameter of rivet hole (d) and the thickness of plate (t) is given by (where d and t are in mm)
Options- A. d = t
- B. d = 1.6 t
- C. d = 2 t
- D. d = 6 t Discuss
- 10. The application of third type levers is found in
Options- A. handle of a hand pump
- B. hand wheel of a punching press
- C. lever of a loaded safety valve
- D. a pair of tongs Discuss
Machine Design problems
Search Results
Correct Answer: to maintain the balls at a fixed distance apart
Correct Answer: The V-belt drive is used with large centre distance
Correct Answer: machine
Correct Answer: prevent the rotation of load being lifted
Correct Answer: brinell hardness number
Correct Answer: decreases
Correct Answer: bolts and nuts
Correct Answer: Mild steel
Correct Answer: d = 6 t
Correct Answer: a pair of tongs
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