1
GATE ME 2009
MCQ (Single Correct Answer)
+2
-0.6
Consider steady, incompressible and irrotational flow through a reducer in a horizontal pipe where the diameter is reduced from $$20cm$$ to $$10cm.$$ The pressure in the $$20cm$$ pipe just upstream of the reducer is $$150kPa.$$ The fluid has a vapour pressure of $$50kPa$$ and a specific weight of $$5\,\,kN/{m^3}.$$ Neglecting frictional effects, the maximum discharge (in $${m^3}/s$$) that can pass through the reducer without causing cavitation is
A
$$0.05$$
B
$$0.16$$
C
$$0.27$$
D
$$0.38$$
2
GATE ME 2005
MCQ (Single Correct Answer)
+2
-0.6
A venturimeter of $$20$$ $$mm$$ throat diameter is used to measure the velocity of water in a horizontal pipe of $$40$$ $$mm$$ diameter. If the pressure difference between the pipe and throat sections is found to be $$30$$ $$kPa$$ then, neglecting frictional losses, the flow velocity is
A
$$0.2$$ $$m/s$$
B
$$1$$ $$m/s$$
C
$$1.4$$ $$m/s$$
D
$$2.0$$ $$m/s$$
3
GATE ME 2005
MCQ (Single Correct Answer)
+2
-0.6
A $$U$$-tube manometer with a small quantity of mercury is used to measure the static pressure difference between two locations $$A$$ and $$B$$ in a conical section through which an incompressible fluid flows. At a particular flow rate, the mercury column appears as shown in the figure. The density of mercury is $$13600$$ $$kg/{m^3}$$ and $$g = 9.81$$ $$m/{s^2}.$$ Which of the following is correct? GATE ME 2005 Fluid Mechanics - Fluid Dynamics Question 26 English
A
Flow direction is $$A$$ to $$B$$ & $${P_A} - {P_B} = 20\,kPa$$
B
Flow direction is $$B$$ to $$A$$ & $${P_A} - {P_B} = 1.4\,kPa$$
C
Flow direction is $$A$$ to $$B$$ & $${P_B} - {P_A} = 20\,kPa$$
D
Flow direction is $$B$$ to $$A$$ & $${P_B} - {P_A} = 1.4\,kPa$$
4
GATE ME 2003
MCQ (Single Correct Answer)
+2
-0.6
A water container is kept on a weighing balance. Water from a tap is falling vertically into the container with a volume flow rate of $$'Q'$$; the velocity of the water when it hits the water surface is $$'U'$$. At a particular instant of time the total mass of the container and water is $$'m'.$$ The force registered by the weighing balance at this instant of time is
A
$$mg + \rho \,QU$$
B
$$mg + 2\,\rho \,QU$$
C
$$mg + \,\rho \,Q{U^2}/2$$
D
$$\rho \,Q{U^2}/2$$
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