ISRO Scientist or Engineer Mechanical 2020

A centrifugal pump havingan impeller diameterof 127 mm,delivers a powerof 12 hp. If the impesrer Giameter is changed to 254 mm, what is the power, if other parameters are kept constant?

In a circular tube of diameter 100 mm and length 13 m with laminarlow,the friction factor is estimated to be 0.05. Calculate the Reynolds number?

An open tankis filled with waterto a height of 20m. Whatis the velocity of the water flow at the outlet, if the outlet is at the base of the tank?

For a non-dimensional specific speed value of 1, for maximum efficiency, which of the following turbines is preferred?

An experiment is conducted with a fluid of density 1 $$\frac{kg}{m^{3}}$$ at 10 $$\frac{m}{s}$$ velocity. The free stream static pressure is 100 kPa and the local static pressure is 101 kPa. What is thepressure coefficient at the location?

In a P-V diagram of a steady flow compressor, the intercooling can be represented as

Whichof the following is a non-Newtonian fluid?

A hot body at 1000 K transfers 2000 kJ of heat to a body at 500 K. Determinethe net entropy change?

Highest ratio of specific heat is possible for?

Which of the following can be used to determine the variation of saturation pressure with temperature along phase boundaries?