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121.

The velocity of the liquid flowing through the divergent portion of a venturimeter

A.	remains constant	B.	increases
C.	decreases	D.	depends upon mass of liquid

122.

The pressure of the liquid flowing through the divergent portion of a venturimeter

A.	remains constant	B.	increases
C.	decreases	D.	depends upon mass of liquid

123.

The divergent portion of a venturimeter is made longer than convergent portion in order to

A.	avoid the tendency of breaking away the stream of liquid	B.	to minimise frictional losses
C.	both (a) and (b)	D.	none of these

124.

In order to measure the flow with a venturimeter, it is installed in

A.	horizontal line	B.	inclined line with flow upwards
C.	inclined line with flow downwards	D.	any direction and in any location

125.

A pitot tube is used to measure the

A.	velocity of flow at the required point in a pipe	B.	pressure difference between two points in a pipe
C.	total pressure of liquid flowing in a a pipe	D.	discharge through a pipe

126.

When the venturimeter is inclined, then for a given flow it will show

A.	same	B.	more
C.	less

127.

If a pitot tube is placed with its nose upstream, downstream or sideways, the reading will be the same in every case.

True

False

128.

Coefficient of contraction is the ratio of

A.	actual velocity of jet at vena contracta to the theoretical velocity	B.	loss of head in the orifice to the head of water available at the exit of the orifice
C.	actual discharge through an orifice to the theoretical discharge	D.	area of jet at vena contracta to the area of orifice

129.

Coefficient of resistance is 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.	loss of head in the orifice to the head of water available at the exit of the orifice	D.	actual discharge through an orifice to the theoretical discharge

130.

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

A.	0.46	B.	0.64
C.	0.78	D.	0.87