ABU Physics 2012/2013 Past Questions

Practice each question, then open it to see the full details.

Dimension of absolute viscosity is

A.ML^-1T^-1
B.MLT^-1
C.ML^-1T
D.MLT

Turbulent flow general occurs for cases involving

A.highly viscous fluid
B.very narrow passage
C.very slow motion
D.none of the above

Forces acting on a particle setting in fluid are ...... forces?

A.gravitational and buoyant
B.centrifugal and buoyant
C.gravitational or centrifugal buoyant drag
D.external, drag and viscous

Which of the following equation applies at terminal viscosity?

A.mg-v-u = 1
B.mg-v-u = 0
C.v+mg-u = ma
D.u-ma+mg = 0

Which of the following is not a high viscous fluid?

A.kerosine
B.glue
C.grease
D.glycerin

Mercury is an ideal barometric fluid mainly due to it's

A.high density
B.low compressibility
C.low capillary action
D.very low vapour pressure

Dimension of surface tension is

A.FL^-1
B.F^-1L
C.FL^-2
D.F^-2L

Which of the following has the smallest least effect on the solubility of a solute into the solvent?

A.nature of the solution
B.nature of the solvent
C.temperature
D.pressure

Which of the following is insensitive to changes in pressure?

A.heat of vaporization
B.melting point
C.heat of fusion
D.both B and C

Vapour pressure of water at 100°C is about ...... bar?

A.0.1013
B.1.013
C.10.13
D.101.3

The light from the sun reaches the earth mainly by

A.convection
B.conduction
C.radiation
D.reflection

One valid assumption of the kinetic theory of gasses is that

A.The molecules are in random motion and the number of collision is constant
B.the number of molecules increases with the pressure
C.the molecules of the gas are very small in size
D.the number of molecules increases with temperature

An astronomical telescope is said to be in normal adjustment when the

A.Eye is accommodated
B.focal length of the objective lens is longer than that of the eye piece
C.final image is at the near point of the eye
D.final image is at infinity