ISRO Scientist or Engineer Mechanical 2018
For the following questions answer them individually
ISRO Scientist or Engineer Mechanical 2018 - Question 21
In a machining operation cutting speed is reduced by 50%. Assuming n = 0.5, C = 300 in Taylor's equation. The increase in tool life is
ISRO Scientist or Engineer Mechanical 2018 - Question 22
In a linear arc welding process, the heat input per unit length is inversely proportional to
ISRO Scientist or Engineer Mechanical 2018 - Question 23
The welding process which uses a blanket of fusible granular flux is
ISRO Scientist or Engineer Mechanical 2018 - Question 24
Two non-zero vectors are parallel if their vector productis
ISRO Scientist or Engineer Mechanical 2018 - Question 25
If eigen value of a matrix A is $$\lambda$$, then the eigen value of A2 is
ISRO Scientist or Engineer Mechanical 2018 - Question 26
The value of $$\lim_{x \rightarrow \infty}\frac{\sin x}{x}$$ is equal to
ISRO Scientist or Engineer Mechanical 2018 - Question 27
If $$f(x) = \frac{1 - x}{1 + x}$$ then $$f \left(\frac{1}{x}\right)$$ is equal to
ISRO Scientist or Engineer Mechanical 2018 - Question 28
Inverse Laplace transform of $$\frac{S}{S^2 + a^2}$$ is
ISRO Scientist or Engineer Mechanical 2018 - Question 29
One dimensional wave equation is
ISRO Scientist or Engineer Mechanical 2018 - Question 30
A composite bar made of Aluminium and Steel is fixed rigidly at supports P and Q as shown in figure. When the temperature of the bar is increased by $$10^\circ C$$, the reactions at the supports are (given $$E_{al} = 70 GPa, E_s = 210 GPa, \alpha_{al} = 11E - 6$$ mm/mm$$^\circ C$$ and $$\alpha_s = 12E - 6 mm/mm^\circ C$$)
