BASIC MECHANICAL ENGINEERING MOST IMPORTANT QUESTION-ANSWER
1. What parameters influence the tool life ?
1. Tool material
2. Work material
3. Speed, feed and depth of cut
4. Tool geometry work system
5. Cutting fluid
6. Built up edge
7.Vibration behaviour of the machine tool.
2. Mention the function of intermediate stage in a generalised measurement system.
Amplify signal without affecting its waveform
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Remove unwanted noise signals that tend to obscure the
input
Capable of doing other conditioning like differentiation/integration, A/D conversion etc.
3. What is a signal flow graph ?
A signal flow graph of a system is a graphical model in which
nodes represent the system variables and directed branches
between the nodes represent relationship between the variables.
In a signal flow graph, a forward path originates from the input
mode and terminates at output mode without encountering any
mode more than once.
4. Explain the difference between rotational and
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irrotational flow.
In rotational flow the vorticity is non zero and in irrotational
flow it is zero. In irrota¬tional flow the net rotation of a fluid
element about its own mass centre is zero as it moves from
one place to another. For it, dv/dx = du/dy.
5. Define the term stability of a feed back control system ?
A system is said to be stable if the output of a system after Datasheet engine for E ComponenComponen
fluctuations, variations or oscilla-tions, settles at a reasonable
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value for any change in input
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