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Mechanical Engineering
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Machine Design
Comments
Question
For unequal width of butt straps, the thickness of butt straps are
Options
A. 0.75
t
for wide strap on the inside and 0.625
t
for narrow strap on the outside
B. 0.75
t
for narrow strap on the inside and 0.625
t
for wide strap on the outside
C. 0.75
t
for both the straps on the inside and outside
D. 0.625
t
for both the straps on the inside and outside
Correct Answer
0.75
t
for wide strap on the inside and 0.625
t
for narrow strap on the outside
Machine Design problems
Search Results
1. The value of stress concentration factor depends upon
Options
A. material of the part
B. geometry of the part
C. material and geometry of the part
D. none of these
Show Answer
Scratch Pad
Discuss
Correct Answer: material and geometry of the part
2. The resistance to fatigue of a material is measured by
Options
A. elastic limit
B. Young's modulus
C. ultimate tensile strength
D. endurance limit
Show Answer
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Discuss
Correct Answer: endurance limit
3. A column is known as a long column if the slenderness ratio is
Options
A. 40
B. 50
C. 70
D. 100
Show Answer
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Discuss
Correct Answer: 100
4. The pipe joint mostly used for pipes carrying water at low pressures is
Options
A. socket joint
B. nipple joint
C. union joint
D. spigot and socket joint
Show Answer
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Discuss
Correct Answer: socket joint
5. The square threads are not so strong as V-threads but they offer less frictional resistance to motion than Whitworth threads.
Options
A. Correct
B. Incorrect
Show Answer
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Discuss
Correct Answer: Correct
6. According to I.B.R., shearing resistance required to shear off the rivet per pitch length (in double shear) is (where
n
= Number of rivets per pitch length)
Options
A.
d
2
x ? x
n
B. 1.875 x
d
2
x ? x
n
C. 2 x
d
2
x ? x
n
D. 3 x
d
2
x ? x
n
Show Answer
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Discuss
Correct Answer: 1.875 x
d
2
x ? x
n
7. Which of the following statement is correct for gears?
Options
A. The addendum is less than dedendum
B. The pitch circle diameter is equal to the product of module and number of teeth
C. The pitch circle is always greater than the base circle
D. all of the above
Show Answer
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Discuss
Correct Answer: all of the above
8. Slenderness ratio is the ratio of
Options
A. maximum size of column to minimum size of column
B. width of column to depth of column
C. effective length of column to least radius of gyration of the column
D. effective length of column to width of column
Show Answer
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Discuss
Correct Answer: effective length of column to least radius of gyration of the column
9. Screws used for power transmission should have
Options
A. Low efficiency
B. high efficiency
C. very fine threads
D. strong teeth
Show Answer
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Discuss
Correct Answer: high efficiency
10. An open belt drive is used when
Options
A. shafts are arranged parallel and rotate in the opposite directions
B. shafts are arranged parallel and rotate in the same directions
C. shafts are arranged at right angles and rotate in one definite direction
D. driven shaft is to be started or stopped whenever desired without interferring with the driving shaft
Show Answer
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Discuss
Correct Answer: shafts are arranged parallel and rotate in the same directions
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