8/10/2019 MOF INT-I

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ECHANICS OF FLUIDS

Time: 45mins Max marks: 25

Date: 27.07.12 PART A - (52= 10 marks) Dept: C!"

Ans#er A"" $%esti&ns:

1. Distinguish between mass density and specific weight.2. State the Newtons law of viscosity

3. Write the euation of surface tension of liuid !et" liuid droplet and

soap bubble.#. i$ %ne sto&e is eual to" ii$ %ne poise is eual to

'. (ind the height through which water rises by capillary action in a 2mmbore" if surface tension at the prevailing temperature is ).)*'g+cm.

PART '

Ans#er A"" $%esti&ns:

1. ,i$(ind the &inematic viscosity of an oil having density -1&g+m3 ./he

shear stress at a point in oil is ).2#'2n+m 2and velocity gradient at thatpoint is ).2 per second. ,'$

,ii$/he dynamic viscosity of an oil" used for lubrication between a shaftand sleeve is 0 poise .the shaft is of diameter ).#m and rotates at

1-)rpm.calculate the power lost in the bearing for a sleeve length of-)mm.the thic&ness of oil film is 1.'mm. ,1)$

ECHANICS OF FLUIDS

Time: 45mins Max marks: 25

Date: 27.07.12 PART A - (52= 10 marks) Dept: C!"

Ans#er A"" $%esti&ns:

1. Distinguish between mass density and specific weight.

2. State the Newtons law of viscosity

3. Write the euation of surface tension of liuid !et" liuid droplet and

soap bubble.#. i$ %ne sto&e is eual to" ii$ %ne poise is eual to'. (ind the height through which water rises by capillary action in a 2mm

bore" if surface tension at the prevailing temperature is ).)*'g+cm.PART '

Ans#er A"" $%esti&ns:

1.,i$(ind the &inematic viscosity of an oil having density -1&g+m3 ./heshear stress at a point in oil is ).2#'2n+m 2and velocity gradient at that

point is ).2 per second. ,'$ ,ii$/he dynamic viscosity of an oil" used for lubrication between a shaft

and sleeve is 0 poise .the shaft is of diameter ).#m and rotates at1-)rpm.calculate the power lost in the bearing for a sleeve length of-)mm.the thic&ness of oil film is 1.'mm. ,1)$

ECHANICS OF FLUIDS

Time: 45mins Max marks: 25

Date: 27.07.12 PART A - (52= 10 marks) Dept: C!"

Ans#er A"" $%esti&ns:

1. Distinguish between mass density and specific weight.

2. State the Newtons law of viscosity3. Write the euation of surface tension of liuid !et" liuid droplet and

soap bubble.#. i$ %ne sto&e is eual to" ii$ %ne poise is eual to

'. (ind the height through which water rises by capillary action in a 2mm

bore" if surface tension at the prevailing temperature is ).)*'g+cm.PART '

Ans#er A"" $%esti&ns:

1.,i$(ind the &inematic viscosity of an oil having density -1&g+m3 ./he

shear stress at a point in oil is ).2#'2n+m 2and velocity gradient at thatpoint is ).2 per second. ,'$

,ii$/he dynamic viscosity of an oil" used for lubrication between a shaft

and sleeve is 0 poise .the shaft is of diameter ).#m and rotates at1-)rpm.calculate the power lost in the bearing for a sleeve length of

-)mm.the thic&ness of oil film is 1.'mm. ,1)$

ECHANICS OF FLUIDS

Time: 45mins Max marks: 25

Date: 27.07.12 PART A - (52= 10 marks) Dept: C!"

Ans#er A"" $%esti&ns:

1. Distinguish between mass density and specific weight.2. State the Newtons law of viscosity

3. Write the euation of surface tension of liuid !et" liuid droplet andsoap bubble.

#. i$ %ne sto&e is eual to" ii$ %ne poise is eual to'. (ind the height through which water rises by capillary action in a 2mmbore" if surface tension at the prevailing temperature is ).)*'g+cm.

PART '

Ans#er A"" $%esti&ns:

1.,i$(ind the &inematic viscosity of an oil having density -1&g+m3 ./he

shear stress at a point in oil is ).2#'2n+m 2and velocity gradient at thatpoint is ).2 per second. ,'$

,ii$/he dynamic viscosity of an oil" used for lubrication between a shaftand sleeve is 0 poise .the shaft is of diameter ).#m and rotates at

1-)rpm.calculate the power lost in the bearing for a sleeve length of

-)mm.the thic&ness of oil film is 1.'mm. ,1)$