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Recent questions tagged isro2009
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ISRO200911
The transition Reynolds number for flow over a flat plate is $5^*10^5$. What is the distance from the leading edge at which transition will occur for flow of water with a uniform velocity of $1 \: m/s$? (For water, the kinematic viscosity $v=0.86^*10^{6} \:m^2/s$) $0.43 \: m$ $1 \: m$ $43 \: m$ $103 \: m$
asked
Mar 6, 2018
in
Fluid Mechanics
by
m2n037
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1.5k
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isro2009
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ISRO200910
At the eye tip of a centrifugal impeller, blade velocity is $200 \: m/s$ while the uniform axial velocity at the inlet is $150 \: m/s$. If the sonic velocity is $300 \: m/s$, then the inlet Mach number of the flow will be $0.75$ $0.66$ $0.90$ $0.83$
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Mar 6, 2018
in
Applications
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m2n037
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1.5k
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isro2009
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ISRO20099
The radiative heat transfer rate per unit area $(W/m2)$ between two plane parallel grey surfaces (emissivity $0.9$) maintained at $400 \: K$ and $300 \: K$ is (Stefan Bottzman constant $\sigma=5.67 \times 10^{6} W/m^2K^4$) $1020$ $464$ $812$ $567$
asked
Mar 6, 2018
in
Heat Transfer
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m2n037
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1.5k
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isro2009
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ISRO20098
The pressure drop for a relatively low Reynolds number flow in a $600 \: mm, \: 30 \: m$ long pipeline is $70 \: kPa$. What is the wall shear stress? $0 \: Pa$ $1400 \: Pa$ $700 \: Pa$ $350 \: Pa$
asked
Mar 6, 2018
in
Fluid Mechanics
by
m2n037
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1.5k
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isro2009
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ISRO20097
A metallic cube of side $10 \: cm$, density $6.8 \: gm/cc$ is floating in liquid mercury (density $13.6 \: gm/cc$), with $5 \: cm$ height of cube exposed above the mercury level. Water (density $1 \: gm/cc$) is filled over this, to submerge the cube fully. The new height of cube exposed above mercury level is $4.6 \: cm$ $5.4 \: cm$ $5.0 \: cm$ $5.8 \: cm$
asked
Mar 6, 2018
in
Fluid Mechanics
by
m2n037
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1.5k
points)
isro2009
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ISRO20096
A necessary percaution in selection of pumps for parallel operations is that HQ characteristics of both should be identical Both pumps should be centrifugal type Both pumps should be identical' There should not be change from positive to negative slope in HQ curve
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Mar 6, 2018
in
Applications
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m2n037
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1.5k
points)
isro2009
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ISRO20095
Across a normal shock Static pressure and the static temperature rise entropy remains constant velocity and static pressure decrease density and temperature decrease
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Mar 6, 2018
in
Fluid Mechanics
by
m2n037
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1.5k
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isro2009
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ISRO20094
The relation ${p^{V}}^{\gamma}$= constant, where $\gamma$ is the ratio of the specific heats of ideal gad=s, is applicable o Any adiabatic process Only reversible adiabatic process Only irreversible adiabatic process Only isothermal process
asked
Mar 6, 2018
in
Heat Transfer
by
m2n037
(
1.5k
points)
isro2009
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ISRO20093
The correct sequence of the centrifugal pump components through which the fluid flows is Impeller, Suction pipe, Foot valve and strainer, Delivery pipe Foot valve and strainer, Suction pipe, Impeller, Delivery pipe Impeller, Suction pipe, Delivery pipe, Foot valve and strainer Suction pipe, Delivery pipe, Impeller, Foot valve and strainer
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Mar 6, 2018
in
Applications
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m2n037
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1.5k
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isro2009
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ISRO20092
If the stream function is given by $\Psi=3xy$, then the velocity at a point $(2,3)$ will be $7.21 \: \text{unit}$ $18 \: \text{unit}$ $10.82 \: \text{unit}$ $54 \: \text{unit}$
asked
Mar 6, 2018
in
Fluid Mechanics
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m2n037
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1.5k
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isro2009
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ISRO20091
A hydraulic press has a ram of $15 \: cm$ diameter and plunger of $1.5 \: cm$. It is required to lift a mass of $1000 \: kg$. The force required on plunger is nearly equal to $100 \: N$ $1000 \: N$ $10000 \: N$ $10 \: N$
asked
Mar 6, 2018
in
Fluid Mechanics
by
m2n037
(
1.5k
points)
isro2009
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