  # ISRO Scientist or Engineer Mechanical May 2017

Instructions

For the following questions answer them individually

Question 21

# In which of the following type of gear train, the first gear and last gear are co-axial. 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. Question 23

# Which of the following treatment does not improve hardness? 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) 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? Question 26

# Fatigue strength for non-ferrous materials is usually defined at —————— stress cycles. Question 27

# If $$A = \begin{bmatrix}9 & 6 \\8 & 7 \end{bmatrix}$$ then $$det(A^{99} - A^{98})$$ is Question 28

# $$\lim_{\theta \rightarrow \frac{\pi}{2}}\frac{\log \left(\theta - \frac{\pi}{2}\right)}{\tan \theta}$$ is Question 29

# The solution of ODE $$y dx + x dy = 0$$ is Question 30

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