Users Also Read

MCQ's Search Engine

Electrical Engineering

Mechanical Engineering

Civil Engineering

Automobile Engineering

Chemical Engineering

Computer Engineering

Electronics Engineering

Medical Science Engg

Q1. | An average value of coefficient of velocity is. |

A. | 0.62 [Wrong Answer] |

B. | 0.76 [Wrong Answer] |

C. | 0.84 [Wrong Answer] |

D. | 0.97 [Correct Answer] |

View Answer
Explanation:-
Answer : DDiscuss it below :!! OOPS Login [Click here] is required to post your answer/resultHelp other students, write article, leave your comments |

**Also Read Similar Questions Below :**

⇒ Froude's number is the ratio of inertia force to.

pressure force

elastic force

gravity force

surface tension force

⇒ The centre of gravity of the volume of the liquid displaced is called.

centre of pressure

centre of buoyancy

metacentre

none of these

⇒ The power transmitted through the pipe is maximum when the head lost due to friction is equal to.

one-fourth of the total supply head

one-third of the total supply head

one-half of the total supply head

two-third of the total supply head

⇒ Laminar flow __________ place at very low velocities.

takes

does not take

Both (a) and (b)

none of these.

⇒ Which of the following is not a reaction turbine?

Furneyron turbine

Jonval turbine

Thomson's turbine

Pelton wheel

⇒ When a body is immersed wholly or partially in a liquid, it is lifted up by a force equal to the weight of liquid displaced by the body. This statement is called.

Pascal's law

Archimede's principle

principle of floatation

Bernoulli's theorem

⇒ Which of the following statement is correct ?

The centrifugal pump is suitable for large discharge and smaller heads.

The centrifugal pump requires less floor area and simple foundation as compared to reciprocating pump.

The efficiency of centrifugal pump is less as compared to reciprocating pump.

all of the above

⇒ In a footstep bearing, if the radius of the shaft is doubled, then the torque required to overcome the viscous resistance will be.

double

four times

eight times

sixteen times

⇒ A channel is said to be of most economical cross-section, if.

it gives maximum discharge for a given cross-sectional area and bed slope

it has minimum wetted perimeter

it involves lesser excavation for the designed amount of discharge

all of the above

⇒ Power required to drive a centrifugal pump is directly proportional to __________ of its impeller.

diameter

square of diameter

cube of diameter

fourth power of diameter

⇒ The discharge in an open channel corresponding to critical depth is.

zero

minimum

maximum

none of these.

⇒ A jet of water discharging from a 40 mm diameter orifice has a diameter of 32 mm at its vena contracta. The coefficient of contraction is.

0.46

0.64

0.78

0.87

⇒ Power required to drive a centrifugal pump is __________ proportional to N3.

directly

inversely

both (a) and (b)

none of these.

⇒ According to equation of continuity,

w1a1 = w2a2

w1v1 = w2v2

a1v1 = a2v2

a1/v1 = a2/v2

⇒ In a sharp-crested weir, the thickness of the weir is kept less than half of the height of water above the crest of the weir.

True

False

Both (a) and (b)

None of these

⇒ Discharge (

*Q*) of a centrifugal pump is given by (where

*D*= Diameter of impeller at inlet,

*b*= Width of impeller at inlet, and

*V*= Velocity of flow at inlet).

_{f}Q = Ï€.D.Vf

Q = Ï€.b.Vf

Q = Ï€.D.b.Vf

Q = D.b.Vf

⇒ The loss of head due to an obstruction in a pipe is twice the loss of head at its entrance.

Agree

Disagree

Both (a) and (b)

None of these

⇒ The cavitation in a hydraulic machine.

causes noise and vibration of various parts

reduces the discharge of a turbine

causes sudden drop in power output and efficiency

all of the above

⇒ A jet of water enters and leaves a fixed curved vane tangentially. The force of jet along perpendicular to the vane is zero.

True

False

Both (a) and (b)

None of these

⇒ Poise is the unit of viscosity in C.G.S. system of units.

Agree

Disagree

Both (a) and (b)

None of these

⇒ The total head of a liquid particle in motion is equal to.

pressure head + kinetic head + potential head

pressure head - (kinetic head + potential head)

potential head - (pressure head + kinetic head)

kinetic head - (pressure head + potential head)

⇒ An orifice is said to be large, if.

the size of orifice is large

the velocity of flow is large

the available head of liquid is more than 5 times the height of orifice

the available head of liquid is less than 5 times the height of orifice

⇒ The quantity of a liquid flowing per second through a section of a pipe or a channel is called discharge and is measured in cumecs (m

^{3}/s).

True

False

Both (a) and (b)

None of these

⇒ The ratio of the inertia force to the viscous force is called.

Reynold's number

Froude's number

Weber's number

Euler's number

⇒ The speed of a turbine runner is.

directly proportional to H1/2

inversely proportional to H1/2

directly proportional to H3/2

inversely proportional to H3/2

⇒ By fitting an air vessel to the reciprocating pump, there is always a saving of work done and subsequently saving of power.The saving in case of a double acting reciprocating pump is.

39.2%

48.8%

84.8%

88.4%

⇒ The jet ratio is defined as the ratio of the.

diameter of jet to the diameter of Pelton wheel

velocity of jet to the velocity of Pelton wheel

diameter of Pelton wheel to the diameter of jet

velocity of Pelton wheel to the velocity of jet

⇒ Barometer is used to measure.

velocity of liquid

atmospheric pressure

pressure in pipes and channels

difference of pressure between two points in a pipe

⇒ A notch is used to measure __________ of liquids.

pressure

pressure

velocity

volume

⇒ In a reciprocating pump, air vessels are fitted to the suction pipe and delivery pipe close to the cylinder of the pump.

True

False

Both (a) and (b)

None of these