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Machine Design

Machine Design
The notch angle of the Izod impact test specimen is

10°
45°
20°
30°

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Machine Design
A sliding bearing in which although lubricant is present, the working surfaces __________ contact each other at least part of the time, is called boundary lubricated bearing.

Partially
Fully
Either A or B
None of these

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Machine Design
Two rigid plates are clamped by means of bolt and nut with an initial force F. After tightening, a separating force P (P < F) is applied to the lower plate, which in turn acts on the nut. The tension in the both after this is

P
F
F.P
F + P

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Machine Design
Which of the following statement is correct for gears?

The addendum is less than dedendum
All of these
The pitch circle is always greater than the base circle
The pitch circle diameter is equal to the product of module and number of teeth

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Machine Design
Two helical springs of the same material and of equal circular cross-section, length and number of turns, but having radii 80 mm and 40 mm, kept concentrically (smaller radius spring within the larger radius spring), are compressed between two parallel planes with a load W. The inner spring will carry a load equal to

W/9
8W/9
W/2
2W/3

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Machine Design
When a bolt is subjected to shock loading, the resilience of the bolt should be considered in order to prevent breakage at the

Shank
Head
Middle
Thread

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