Top 550+ Solved Fluid Mechanics and Hydraulic Machines MCQ Questions Answer
Q. Two units are homologous when they are geometrically similar and have
a. Similar stream lines
b. Same Froud's number
c. Same efficiency
d. Same Reynolds number
e. None of these answers
Q. Select a common dimensionless parameter in fluid mechanics from the following
a. Kinematic viscosity
b. Specific gravity
c. Specific weight
d. Angular velocity
e. None of the these answers
Q. The state in which Hirakund dam is established is
a. Madhya Pardesh
b. Uttar Pradesh
c. Bihar
d. Orissa
e. West Bengal
Q. What pressure, in Mpa, must be maintained in a diving bell, at a depth of 1200 m, to keep out the ocean water (S = 1.03)
a. 12.1
b. 1.24
c. 5.16
d. 14.3
e. 9.32
Q. The most efficient cross-section for a channel is
a. Half hexagon in the form of a trapezoid
b. Rectangular
c. Square
d. Triangular
e. Semi-circular
Q. The locus of elevations that water will rise in a series of pitot tube is called
a. the energy grade line
b. the velocity head
c. the hydraulic grade line
d. the head loss
e. the pressure head
Q. Which of the following component of a reciprocating pump is not made of cast iron?
a. Cylinder
b. Air vessel
c. Foot valve
d. Shaft
e. All of the above
Q. Surface tension is due to
b. adhesion only
c. cohesion only
d. cohesion and adhesion only
e. neither cohesion nor adhesion
Q. The value of mannings roughness coefficient n, in Manning's formula for flow of fluids through pipes, is expected to be highest in case of
a. Brass pipe
b. Glass pipe
c. Asbestos cement pipe
d. Vitrified sewer pipe
e. Corrugated iron pipe
Q. In a jet pump
a. kinetic energy of fluid is regained as potential energy
b. energy of high velocity stream is converted into pressure energy
c. energy of high pressure fluid is converted into low pressure fluid
d. potential energy of fluid is converted into rotational energy
Q. The gentre of gravity of the volume of liquid displaced by an immersed body is called
a. Centre of buoyancy
b. Wet C.G.
c. Metacentre
d. Wet centre
e. Centre of pressure
Q. The ratio of maximum load to the rated plant capacity is known as
a. Utilization factor
b. Plant factor
c. Load factor
d. Capacity factor
e. Maximum load factor
Q. In Buttress dam the column or slenderness ratio is usually maintained between
a. 2 to 5
b. 12 to 15
c. 20 to 25
d. 5 to 7
e. 7 to 10
Q. Undershot water wheels are those on which water acts
a. Purely by impulse
b. Partly by impulse and partly by reaction
c. Purely by reaction
d. None of the above
e. None of the above