Top 1000+ Solved Fluid Mechanics (FM) MCQ Questions Answer
Q. The force exerted by jet of the water on stationary vertical plate in the direction of the jet is given by
a. fx= ??av2sin2??
b. fx= ??av2(1+cos??)
c. fx= ??av2
d. none of the above
Q. The force exerted by jet of the water on stationary inclined plate in the direction of the jet is given by
a. fx= ??av2
b. fx= ??av2sin2??
c. fx= ??av2 (1+cos??)
d. fx= ??av2 (1+sin??)
Q. The force exerted by jet of the water on stationary curved plate in the direction of the jet is given by
a. fx = ??av2sin2??
b. fx = ??av2(1+cos??)
c. fx = ??av2
d. fx = ??av2 (1+sin??)
Q. The force exerted by jet of the water having velocity V on a vertical plate moving with a velocity u isgiven by
a. fx = ??a(v-u) 2sin2??
b. fx = ??a(v-u) 2
c. fx = ??a(v-u) 2 [1+cos??]
d. none of the above
Q. The force exerted by jet of the water having velocity V on a series of vertical plate moving with avelocity u is given by,
a. fx= ??av2.
b. fx = ??a(v-u) 2
c. fx = ??avu.
d. none of the above.
Q. Efficiency of the jet of the water having velocity V & Striking a series if vertical plates moving with a velocity u is given by,
a. [2v(v-u)]/u2
b. [2u(v-u)]/v2
c. u2/[v2(v-u)]
d. none of the above.
Q. Efficiency off the jet of the water having velocity V & Striking a series of vertical plates moving witha velocity u, is maximum when
a. 1/g (vw1u1 + vw2u2)
b. 1/g[v1u1+v2u2]
c. 1/g[vw1u1??vw2u2.]
d. none of the above
Q. For a series o curved radial vanes, the work done per second per unit weight is equal to
a. 1/g (vw1u1 + vw2u2)
b. 1/g[v1u1+v2u2]
c. 1/g[vw1u1??vw2u2.]
d. none of the above
Q. The work done by centrifugal pump on water per second per unit weight of water is given by
a. 1/g[vw1u1]
b. 1/g[vw2u2]
c. 1/g[vw2u2-vw1u1]
d. none of the above
Q. The manometric head Hm of a centrifugal pump is given by
a. pressure head at the outlet of the pump – pressure head at the inlet
b. total head at inlet – total head at outlet
c. total head at outlet - total head at inlet
d. none of the above
Q. To produce a high head by multistage centrifugal pumps, the impellers are connected…P
a. ge 3 of 7a) in parallel
b. in series
c. in parallel and in series both
d. none of the above
Q. To discharge a large quantity of liquid by multi-stage centrifugal pump, the impellers are connected
a. in parallel
b. in series
c. in parallel and in series both
d. none of the above
Q. Specific speed of a pump is the speed at which a pump runs when
a. head developed is unity and discharge is one cubic meter
b. head developed is unity and shat horse power is also unity
c. discharge is one cubic meter and shaft horse power is unity
d. none of the above
Q. Cavitation will take place if the pressure of the flowing fluid at any point isP
a. ge 4 of 7a) more than vapor pressure of the fluid
b. equal to vapor pressure of the fluid
c. is less than vapor pressure of the fluid
d. none of the above
Q. Which among the following is an important parameter to avoid cavitation?
a. Tail race length
b. Head race length
c. Height of draft tube
d. Pump