Which is the device used to measure pressure inside a vessel?
Barometer
Manometer
Nanometer
Lactometer
The force acting normally on a surface is called
Gravity
Pressure
Thrust
Buoyant force
The unit of pressure is
Newton
Newton / metre
Pascal
Newton metre
A liquid gives force of 100 N over an area of 2 m2. What is the pressure?
50 N / m2
100 N / m2
25 N / m2
150 N / m2
Which one of the following is used to reduce friction in rotating parts such as wheels rotates about a fixed shaft?
Grease
Ball bearings
Metal rods
Oil
Density of an object
Is different in different place
Is greater in liquids
Is a constant
Is less in liquids
Dams are constructed with
Greater thickness at their top
Greater thickness at their bottom
Greater thickness at their centre
Same thickness from top to bottom
Materials used to reduce friction are called
Lubricants
Fuels
Catalyst
None of these
Which one of the following is correct?
Force cannot stop a moving object
Force cannot change the speed of a moving object
Force cannot change shape and size
Force can change the direction of motion
The force exerted by a liquid on a body immersed fully or partially in it is the
Gravitational force
Magnetic force
