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Mechanical Engineering - Machine Design

Exercise : Machine Design - Section 9
26.
The product of the diametral pitch and circular pitch is equal to
1
1/π
π
π x number of teeth
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.
If T1 and T2 are the tensions on the tight and slack sides of the belt respectively, and Tc is the centrifugal tension, then initial tension in the belt is equal to
T1 - T2 + Tc
T1 + T2 + Tc
Answer: Option
Explanation:
No answer description is available. Let's discuss.
28.
The smallest diameter of an external or internal screw thread is known as
minor diameter
major diameter
pitch diameter
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
29.
The process which improves the machinability of steels, but lowers the hardness and tensile strength is
normalising
full annealing
process annealing
spheroidising
Answer: Option
Explanation:
No answer description is available. Let's discuss.
30.
Which of the following statement is wrong ?
A key is used as a temporary fastening
A key is subjected to tensile stresses
A key is always inserted parallel to the axis of the shaft
A key prevents relative motion between the shaft and boss of the pulley
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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