Engineering :: Production Engineering
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41. |
Which one of the following materials will have lowest cutting speed? |
A. |
Mild steel |
B. |
Aluminium |
C. |
Brass |
D. |
Bronze |
E. |
High carbon steel |
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Answer: Option E
Explanation:
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42. |
Spindle speed in a lathe for turning a 40 cm dia rod at a cutting speed of 30 m/min would be |
A. |
100 rpm |
B. |
206 rpm |
C. |
238 rpm |
D. |
336 rpm |
E. |
468 rpm |
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Answer: Option C
Explanation:
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43. |
When 50 mm rod is turning at a spindle speed of 200 rpm the cutting speed would be |
A. |
10 - 12 m/min |
B. |
12 - 15 m/min |
C. |
15 - 20 m/min |
D. |
20 - 28 m/min |
E. |
30-35 m/min |
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Answer: Option E
Explanation:
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44. |
While machining a brass casting on a lathe, the type of chuck used is |
A. |
Collect chuck |
B. |
Magnetic chuck |
C. |
Face plate |
D. |
Three jaw chuck |
E. |
Four jaw chuck |
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Answer: Option E
Explanation:
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45. |
When large number of components are turned and parted off from a bar, the chuck used is |
A. |
Three jaw chuck |
B. |
Four jaw chuck |
C. |
Face place |
D. |
Collet chuck |
E. |
Magnetic chuck |
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Answer: Option D
Explanation:
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46. |
In a drilling operation |
A. |
Torque is equal to the axial force |
B. |
Torque is more than the axial force |
C. |
Torque is less than the axial force |
D. |
Torque is half the axial force |
E. |
None of above |
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Answer: Option D
Explanation:
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47. |
Gear tooth vernier is used to measure |
A. |
Gear tooth profile |
B. |
Gear tooth thickness |
C. |
Pitch line thickness of gear tooth |
D. |
Module |
E. |
Addendum and dedendum |
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Answer: Option C
Explanation:
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48. |
Stub tooth are cut on gears |
A. |
Subjected to shock and vibration |
B. |
To reduce centre distance between shafts |
C. |
To reduce frictional torque |
D. |
To improve transmission efficiency |
E. |
None of above |
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Answer: Option A
Explanation:
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49. |
Cutting speeds for some materials are given as |
A. |
20 m/min |
B. |
30 m/min |
C. |
40 m/min |
D. |
80 m/min |
E. |
100 m/min |
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Answer: Option C
Explanation:
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50. |
Undercutting is |
A. |
An operation of cutting extra wide threads |
B. |
An operation of cutting a groove next to a shoulder on a piece of work |
C. |
Cutting from the base of a work piece |
D. |
An operation of cutting deep grooves |
E. |
None of above |
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Answer: Option B
Explanation:
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