ISRO Scientist or Engineer Mechanical May 2017

Instructions

For the following questions answer them individually

ISRO Scientist or Engineer Mechanical May 2017 - Question 21


In which of the following type of gear train, the first gear and last gear are co-axial.

Video Solution

ISRO Scientist or Engineer Mechanical May 2017 - Question 22


For heat transfer across a composite slab with materials having different thermal conductivity, study the following statements.
I. Temperature is continuous always.
II. Temperature gradient is not continuous.
III. Heat flow is not continuous.

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ISRO Scientist or Engineer Mechanical May 2017 - Question 23


Which of the following treatment does not improve hardness?

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ISRO Scientist or Engineer Mechanical May 2017 - Question 24


The ratio of the height of a porter governor (when the length of arms and links are equal) to the height of watt governor is: (m: mass of the ball; M : mass of the sleeve)

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ISRO Scientist or Engineer Mechanical May 2017 - Question 25


For a specified inlet and outlet temperatures, for which kind of heat exchanger will the log mean temperature difference, $$\triangle T_{lm}$$ will be highest?

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ISRO Scientist or Engineer Mechanical May 2017 - Question 26


Fatigue strength for non-ferrous materials is usually defined at —————— stress cycles.

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ISRO Scientist or Engineer Mechanical May 2017 - Question 27


If $$A = \begin{bmatrix}9 & 6 \\8 & 7 \end{bmatrix}$$ then $$det(A^{99} - A^{98})$$ is

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ISRO Scientist or Engineer Mechanical May 2017 - Question 28


$$\lim_{\theta \rightarrow \frac{\pi}{2}}\frac{\log \left(\theta - \frac{\pi}{2}\right)}{\tan \theta}$$ is

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ISRO Scientist or Engineer Mechanical May 2017 - Question 29


The solution of ODE $$y dx + x dy = 0$$ is

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ISRO Scientist or Engineer Mechanical May 2017 - Question 30


If $$\phi$$ is a scalar point function, the value of curl Grad $$\phi$$ is

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