Heat Transfer Questions and Answers – Von- Karmal Equation

This set of Heat Transfer Multiple Choice Questions & Answers (MCQs) focuses on “Von- Karmal Equation”.

1. Glycerin at 10 degree Celsius flows past a flat plate at 20 m/s. Workout the velocity components at a point P(x, y) in the fluid flow where
x = 2 m from the leading edge of the plate
y = 5 cm from the plate surface
For glycerin at 10 degree Celsius, kinematic viscosity = 2.79 * 10 ^-3 m²/s
a) 15.92 m/s and 0.0952 m/s
b) 16.92 m/s and 0.0952 m/s
c) 17.92 m/s and 0.0752 m/s
d) 18.92 m/s and 0.0752 m/s
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2. A plate 0.3 m long is placed at zero angle of incidence in a stream of 15 degree Celsius water moving at 1 m/s. Find out the stream wise velocity component at the mid-point of the boundary layer. For water at 15 degree Celsius
p = 998.9 kg /m³
µ = 415.85 * 10 ^-2 kg/hr m
a) 0.736 m/s
b) 0.636 m/s
c) 0.536 m/s
d) 0.436 m/s
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3. Air at 25 degree Celsius flows over a flat surface with a sharp leading edge at 1.5 m/s. Find the boundary layer thickness at 0.5 from the leading edge. For air at 25 degree Celsius, kinematic viscosity = 15.53* 10n ^-6 m²/s
a) 4.1376 cm
b) 3.1376 cm
c) 2.1376 cm
d) 1.1376 cm
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4. Local skin friction coefficient is given by
a) 0.646/ (Re) ^1/2
b) 1.646/ (Re) ^1/2
c) 2.646/ (Re) ^1/2
d) 3.646/ (Re) ^1/2
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5. A plate 0.3 m long is placed at zero angle of incidence in a stream of 15 degree Celsius water moving at 1 m/s. Find out the maximum boundary layer thickness. For water at 15 degree Celsius. For water at 15 degree Celsius
p = 998.9 kg /m³
µ = 415.85 * 10 ^-2 kg/hr m
a) 4.945 m
b) 3.945 m
c) 2.945 m
d) 1.945 m
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6. Shear stress at the middle of the plate is given by
a) T _W = 0.964 p U _INFINITY ²/2 (Re) ^1/2
b) T _W = 0.864 p U _INFINITY ²/2 (Re) ^1/2
c) T _W = 0.764 p U _INFINITY ²/2 (Re) ^1/2
d) T _W = 0.664 p U _INFINITY ²/2 (Re) ^1/2.
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7. Boundary layer thickness is given by
a) δ = 5.64 x/ (Re) ^½
b) δ = 5.64 x/ (Re) ^½
c) δ = 6.64 x/ (Re) ^½
d) δ = 7.74 x/ (Re) ^½
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8. Air at 25 degree Celsius flows over a flat surface with a sharp leading edge at 1.5 m/s. Find the value of Reynolds number. For air at 25 degree Celsius, kinematic viscosity = 15.53* 10n ^-6 m²/s
a) 38694
b) 12846
c) 48294
d) 76386
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9. A plate 0.3 m long is placed at zero angle of incidence in a stream of 15 degree Celsius water moving at 1 m/s. Find out the maximum value of the normal component of velocity at thr trailing edge of the plate. For water at 15 degree Celsius
p = 998.9 kg /m³
µ = 415.85 * 10 ^-2 kg/hr m
a) 1.6885 * 10 ^-2 m/s
b) 1.6885 * 10 ^-3 m/s
c) 1.6885 * 10 ^-4 m/s
d) 1.6885 * 10 ^-5 m/s
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Sanfoundry Global Education & Learning Series – Heat Transfer.

To practice all areas of Heat Transfer, here is complete set of 1000+ Multiple Choice Questions and Answers.

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