1
GATE ME 2010
MCQ (Single Correct Answer)
+2
-0.6
A lightly loaded full journal bearing has a journal of $$50mm,$$ bush bore of $$50.50mm$$ and bush length of $$20mm.$$ if rotational speed of journal is $$1200rpm$$ and average viscosity of liquid lubricant is $$0.03$$ $$Pa$$- $$sec,$$ the power loss (in Watt) will be :
A
$$37$$
B
$$74$$
C
$$118$$
D
$$237$$
2
GATE ME 2008
MCQ (Single Correct Answer)
+2
-0.6
A cubic block of side $$'L'$$ and mass $$'M'$$ is dragged over an oil film across table by a string connects to a hanging block of mass $$'m'$$ as shown is fig. The Newtonian oil film of thickness $$'h'$$ has dynamic viscosity $$'\mu '$$ and the flow condition is laminar. The acceleration due to gravity is $$'g'.$$ The steady state velocity $$'v'$$ of block is : GATE ME 2008 Fluid Mechanics - Fluid Properties Question 2 English
A
$${{M\,g\,h} \over {\mu {L^2}}}$$
B
$${{M\,g\,h} \over \mu }$$
C
$${{m\,g\,h} \over {\mu {L^2}}}$$
D
$${{m\,g\,h} \over \mu }$$
3
GATE ME 2008
MCQ (Single Correct Answer)
+2
-0.6
A journal bearing has a shaft diameter of $$40$$ $$mm$$ and a length of $$40mm.$$ The shaft is rotating at $$20$$ $$rad/s$$ and the viscosity of the lubricant is $$20$$ $$mPa$$-$$s$$. The clearance is $$0.020$$ $$mm.$$ The loss of torque due to the viscosity of the lubricant is approximately:
A
$$0.040$$ $$Nm$$
B
$$0.252$$ $$Nm$$
C
$$0.400$$ $$Nm$$
D
$$0.652$$ $$Nm$$
4
GATE ME 2007
MCQ (Single Correct Answer)
+2
-0.6
Newton's law of viscosity states that the shear stress in a fluid is proportional to :
A
The velocity of the fluid.
B
The time rate of change of velocity of the fluid.
C
The rate of change of velocity of the fluid with the height of fluid film.
D
The square of the velocity of the fluid.
GATE ME Subjects
Turbo Machinery
EXAM MAP