1
GATE ME 1988
MCQ (Single Correct Answer)
+1
-0.3
The parameters which determines the friction factor for turbulent flow in a rough pipe are:
A
Froude number and relative roughness
B
Froude number and Mach number
C
Reynolds number and relative roughness.
D
Mach number and relative roughness
2
GATE ME 1988
Subjective
+5
-0
A $$0.20$$ $$m$$ diameter pipe $$20$$ $$km$$ long transport oil at a flow rate of $$0.01{m^3}/s.$$ Calculate the power required to maintain the flow if the dynamic viscosity and density of oil are $$0.08$$ $$Pa$$-$$sec$$ and $$900\,kg/{m^3}.$$
3
GATE ME 1988
Numerical
+5
-0
Steam is flowing through an insulated steel pipe shown in the fig, is losing heat to the surroundings. The details are as follows

Inner radius of steel pipe $$=50mm,$$
Outer radius of the steel pipe $$=57mm,$$
Outer radius of insulation $$=157 mm,$$
Thermal conductivity of steel $$=43$$ $$W/mK$$
Thermal conductivity of insulating material $$=0.1$$ $$W/mK$$
Heat transfer coefficient on steam side $$ = 570W/{m^2}K$$
Heat transfer coefficient on air side $$ = 12W/{m^2}K,$$
Temperature of steam $$ = {500^ \circ }C$$
Temperature of surroundings $$ = {30^ \circ }C$$

GATE ME 1988 Heat Transfer - Conduction Question 1 English

Calculate the heat loss per meter length of pipe and temp of the outer surface of the insulation.

Your input ____
4
GATE ME 1988
MCQ (Single Correct Answer)
+1
-0.3
For the fluid flowing over a flat plate with Prandtle number greater than unity, the thermal boundary layer for laminar forced convection
A
is thinner than the hydrodynamic boundary layer
B
Has thickness equal to zero
C
is of same thickness as hydrodynamic boundary layer
D
is thicker than the hydrodynamic boundary layer
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
CBSE
Class 12