ISRO Scientist or Engineer Mechanical 2013

A small plastic boat loaded with pieces of steel rods is floating in a bath tub. If the cargo is , dumped in to the water, allowing the boatto float empty, the water level in the tub will

Viscosity of water in comparison to mercury is

Froude number is significant in:

The purpose of surge tank in pipeline is to

Head loss in turbulent flow in a pipe

A tank 1.5m stands on trolly and is full of water. It has an orifice of diameter 0.1m at 0.3m from the bottom of the tank. If the orifice is suddenly opened and coefficient of discharge of the orifice is 0.60, then the propelling force on the trolley will be

A modelof a hydraulic turbine is tested at a head of 1/4™ of that under which the full scale turbine works. The diameter of the modelis half of that of the full scale turbine. if N is the RPM of the full scale turbine, then RPM of the modelwill be

Consider steady, incompressible and irrotational flow through a reducer in a horizontal pipe, where the diameter is reduced from 20 cm to 10 cm. The pressure in the 20 cm pipe just upstream of the reduceris 150 kPa . The fluid has a vapour pressure of 50 kPa and a specific weight of 5 kN/m$$^3$$’. Neglecting frictional effects, the maximum discharge (in m$$^3$$/sec) that can pass through the reducer without causing cavitations is

For the stability of a floating body, under the influence of gravity alone, which of the following is true?

A smooth pipe of diameter 200mm carries water. The pressure in the pipe at Section $$S_{1}$$ (elevation: 10m) is 50 kPa _ At section $$S_{2}$$ (elevation: 12 m ) the pressure is 20 kPa and velocity is 2 $$\frac{m}{sec}$$. Density of water is 1000 $$\frac{kg}{m^{3}}$$ and acceleration due to gravity is 9.8 $$\frac{m}{sec}$$ ? . Which of the following is true?