1) Shear stress inward a turbulent flow is given past times the formula
τ = η (du / dy)
Where η (eta) is,
a. eddy viscosity
b. apparent viscosity
c. virtual viscosity
d. all of the above
ANSWER: all of the above
2) Magnitude of eddy viscosity for laminar flow is
a. less than zero
b. zero
c. greater than zero
d. unpredictable
ANSWER: zero
3) Kinematic eddy viscosity (ε) is the ratio of
a. eddy viscosity (η) to dynamic viscosity (μ)
b. eddy viscosity (η) to kinematic viscosity (ν)
c. kinematic viscosity to eddy viscosity (η)
d. eddy viscosity (η) to majority density (ρ)
ANSWER: eddy viscosity (η) to majority density (ρ)
4) Friction factor for laminar flow is given by
a. (Re /64)
b. (64 / Re)
c. (Re / 16)
d. (16 / Re)
ANSWER: (64 / Re)
5) What is temporal hateful velocity?
a. The average of velocities at a betoken over a sure as shooting menstruum of time
b. The average of velocities of a unmarried particle over dissimilar locations inward a fluid flow
c. None of the abov
ANSWER: The average of velocities at a betoken over a sure as shooting menstruum of time
6) The friction factor inward fluid flowing through piping depends upon
a. Reynold's number
b. relative roughness of piping surface
c. both a. in addition to b.
d. none of the above
ANSWER: both a. in addition to b.
7) What is the upshot of modify inward Reynold's release on friction factor inward turbulent flow?
a. As the Reynold's release increases the friction factor increases inward turbulent flow
b. As the Reynold's release increases the friction factor decreases inward turbulent flow
c. modify inward Reynold's release does non demeanor upon the friction factor inward turbulent flow
d. unpredictable
ANSWER: As the Reynold's release increases the friction factor decreases inward turbulent
flow
8) What is the formula for determining the size of equivalent piping for ii pipes of lengths
L1, L2 in addition to diameters d1, d2 respectively?
Where,
L = L1 + L2
a. (L / d) = (L1 / d1) + (L2 / d2)
b. (L / d2 ) = (L1 / d1
2) + (L2 / d2
2)
c. (L / d3) = (L1 / d1
three ) + (L2 / d2
3)
d. (L / d5) = (L1 / d1
five ) + (L2 / d2
5)
ANSWER: (L / d5) = (L1 / d1
five ) + (L2 / d2
5)
9) What is a syphon?
a. H5N1 long curvature piping used to ship H2O from a reservoir at a higher degree to about other reservoir at a
lower degree when ii reservoirs are separated past times a hill
b. H5N1 long curvature piping used to ship H2O from a reservoir at a lower degree to about other reservoir at a
higher degree alongside about travel input when ii reservoirs are separated past times a hill
c. H5N1 long curvature piping used to ship H2O from 1 reservoir to about other reservoir when two
reservoirs are at same elevation
d. Unpredictable
ANSWER: H5N1 long curvature piping used to ship H2O from a reservoir at a higher degree to
about other reservoir at a lower degree when ii reservoirs are separated past times a hill
10) The highest betoken of syphon is called as
a. syphon top
b. summit
c. reservoir
d. none of the above
ANSWER: summit
11) Match the next physical quantities inward Group 1 alongside their dimensions inward Group 2.
1. Work done (Energy) (W) ----------------------------- A. [M L 2 T – three ]
2. Power (P) ------------------------------------------------ B. [M L – 1 T – 1 ]
3. Momentum (M) ---------------------------------------- C. [M L 2 T – 2 ]
4. Modulus of elasticity (E) ----------------------------- D. [M L T – 1 ]
5. Dynamic viscosity (μ) --------------------------------- E. [M L – 1 T – 2 ]
a. 1-(C), 2-(A), 3-(D), 4-(E), 5-(B)
b. 1-(A), 2-(C), 3-(D), 4-(E), 5-(B)
c. 1-(C), 2-(A), 3-(E), 4-(B), 5-(D)
d. 1-(D), 2-(E), 3-(B), 4-(A), 5-(C)
ANSWER: 1-(C), 2-(A), 3-(D), 4-(E), 5-(B)
12) Which of the next equations is non dimensionally homogeneous?
Consider criterion symbols for quantities.
a. (Force) F = thousand x a
b. (Head Loss due to friction) hf = (f L V2) / (2 g d)
c. (Torque) T = F x Distance
d. None of the above
ANSWER: None of the above
13) Which of the next is a dimensionless equation?
a. Reynold's equation
b. Euler's equation
c. Weber's equation
d. All of the above
ANSWER: All of the above
14) Which of the next release is applicable inward opened upward hydraulic construction such as
spillways, where gravitational strength is predominant?
a. Reynold's Number
b. Euler's Number
c. Weber's Number
d. Froude's Number
ANSWER: Froude's Number
15) Square beginning of the ratio of inertia strength to elastic strength is called as
a. Mach's Number
b. Cauchy's Number
c. Both a. in addition to b.
d. None of the above
ANSWER: Both a. in addition to b.
16) Boundary layer thickness is the distance from the boundary to the betoken where
velocity of the fluid is
a. equal to 10% of costless current velocity
b. equal to 50% of costless current velocity
c. equal to 90% of costless current velocity
d. equal to 99% of costless current velocity
ANSWER: equal to 99% of costless current velocity
17) The element of the total strength exerted past times fluid on a torso inward the administration parallel to
the administration of motility is called as
a. lift
b. drag
c. both a. in addition to b.
d. none of the above
ANSWER: drag
18) The center of components of shear forces inward the administration of flow of fluid is called as
a. shear drag
b. friction drag
c. pare drag
d. all of the above
ANSWER: all of the above
19) The torso whose surface does non coincide alongside the streamline when places inward a flow is
called as
a. streamline body
b. moving ridge body
c. bluff body
d. induced body
ANSWER: bluff body
20) Which type of torso is an airfoil?
a. streamline body
b. moving ridge body
c. bluff body
d. induced body
ANSWER: streamline body
21) Bulk modulus is the ratio of
a. shear stress to volumetric strain
b. volumetric strain to shear stress
c. compressive stress to volumetric strain
d. volumetric strain to compressive stress
ANSWER: compressive stress to volumetric strain
22) When is a liquid said to live non inward a boiling or vaporized state?
a. If the pressure level on liquid is equal to its vapour pressure
b. If the pressure level on liquid is less than its vapour pressure
c. If the pressure level on liquid is to a greater extent than than its vapour pressure
d. Unpredictable
ANSWER: If the pressure level on liquid is to a greater extent than than its vapour pressure
23) One litre of a sure as shooting fluid weighs 8N. What is its specific volume?
a. 2.03 x 10– three m3/kg
b. 20.3 x 10– three m3/kg
c. 12.3 x 10– three m3/kg
d. 1.23 x 10– three m3/kg
ANSWER: 1.23 x 10– three m3/kg
24) What is the right formula for absolute pressure?
a. Pabs = Patm – Pgauge
b. Pabs = Pvacuum – Patm
c. Pabs = Pvacuum + Patm
d. Pabs = Patm+ Pgauge
ANSWER: Pabs = Patm+ Pgauge
25) According to Archimede's principle, if a torso is immersed partially or fully inward a fluid
in addition to therefore the buoyancy strength is _______ the weight of fluid displaced past times the body.
a. equal to
b. less than
c. to a greater extent than than
d. unpredictable
ANSWER: equal to Sumber http://mechanicalgalaxy.blogspot.com/
Branches of mechanical engineering: Of Import Mcq (Qustions On Fluid Dynamics)
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Interviews,
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