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131.

The coefficient of discharge is the ratio of theoretical discharge to the actual discharge through an orifice.

True

False

132.

Coefficient of velocity is defined as the ratio of

A.	actual velocity of jet at vena contracta to the theoretical velocity	B.	area of jet at vena contracta to the area of orifice
C.	actual discharge through an orifice to the theoretical discharge	D.	none of the above

133.

An average value of coefficient of velocity is

A.	0.62	B.	0.76
C.	0.84	D.	0.97

134.

The value of coefficient of velocity for a sharp edged orifice

decrease

increases

135.

The value of coefficient of discharge is

A.	less than	B.	same as
C.	more than

136.

Which of the following statement is wrong?

A.	A flow whose streamline is represented by a curve, is called two dimensional flow.	B.	The total energy of a liquid particle is the sum of potential energy, inetic energy and pressure energy.
C.	The length of divergent portion in a venturimeter is equal to the convergent portion.	D.	A pitot tube is used to measure the velocity of flow at the required point in a pipe.

137.

An orifice is said to be large, if

A.	the size of orifice is large	B.	the velocity of flow is large
C.	the available head of liquid is more than 5 times the height of orifice	D.	the available head of liquid is les than 5 times the height of orifice

138.

The velocity of liquid flowing through an orifice varies with the available head of the liquid.

Agree

Disagree

139.

If the value of coefficient of discharge increases, the discharge through the orifice decreases.

True

False

140.

A pipe of length more than double the diameter of orifice fitted externally or internally to the orifice is called a

A.	notch	B.	weir
C.	mouthpiece	D.	nozzle