The speed of sound in a ideal gas varies directly as its__________________?

A. pressure
B. temperature
C. density
D. modulus of elasticity

Which of the following instrument can be used for measuring speed of a submarine moving in deep sea__________________?

A. venturimeter
B. orifice plate
C. hot wire anemometer
D. rotameter

Piezometer is used to measure_____________________?

A. Pressure in pipe, channels etc.
B. Atmospheric pressure
C. Very low pressures
D. Difference of pressure between two points

Euler’s dimensionless number relates the following__________________?

A. Inertial force and gravity
B. Viscous force and inertial force
C. Viscous force and buoyancy force
D. Pressure force and inertial force

Working principle of dead weight pressure gauge tester is based on_______________?

A. Pascal’s law
B. Dalton’s law of partial pressure
C. Newton’s law of viscosity .
D. Avogadro’s hypothesis

Which of the following manometer has highest sensitivity_________________?

A. U-tube with water
B. Inclined u-tube
C. U-tube with mercury
D. Micro-manometer with water

The resultant upward pressure of the fluid on an immersed body due to its tendency to uplift the sub-merged body is called_______________?

A. Upthrust
B. Reaction
C. Buoyancy
D. Metacentre

Center of pressure compared to e.g. is___________________?

A. Above it
B. Below it
C. At same point
D. Above or below depending on area of body

A body floats in stable equilibrium ____________________?

A. When its meatcentric height is zero
B. When the metancentre is above e.g.
C. When its e.g. is below it’s center of buoyancy
D. Metacentre has nothing to do with position of e.g. for determining stability

The depth of the center of pressure on a vertical rectangular gate 8 m wide and 6 m high, when the water surface coincides with the top of the gate, is____________________?

A. 2.4 m
B. 3.0 m
C. 4.0 m
D. ”2.5 m