The wake_______________?
(A) always occurs before a separation point
(B) always occurs after a separation point
(C) is a region of high pressure intensity
(D) none of the above
A fluid of kinematic viscosity 0.4 cm2/sec flows through a 8 cm diameter pipe. The maximum velocity for laminar flow will be__________________?
(A) less than 1 m/sec
(B) 1 m/sec
(C) 1.5 m/sec
(D) 2 m/sec
The losses are more in_________________?
(A) laminar flow
(B) transition flow
(C) turbulent flow
(D) critical flow
Two pipe systems are said to be equivalent when_________________?
(A) head loss and discharge are same in two systems
(B) length of pipe and discharge are same in two systems
(C) friction factor and length are same in two systems
(D) length and diameter are same in two systems
The speed of a pressure wave through a pipe depends upon________________?
(A) the length of pipe
(B) the viscosity of fluid
(C) the bulk modulus for the fluid
(D) the original head
For laminar flow in circular pipes, the Darcy’s friction factor f is equal to_________________?
(A) 16/Re
(B) 32/ Re
(C) 64/ Re
(D) none of the above where R,, is Reynolds number
The horse power transmitted through a pipe is maximum when the ratio of loss of head due to friction and total head supplied is________________?
(A) 1/3
(B) 1/4
(C) 1/2
(D) 2/3
If the elevation of hydraulic grade line at the junction of three pipes is above the elevation of reservoirs B and C and below reservoir A, then the direction of flow will be___________________?
(A) from reservoir A to reservoirs B and C
(B) from reservoir B to reservoirs C and A
(C) from reservoir C to reservoirs A and B
(D) unpredictable
The correct relationship among displacement thickness d, momentum thickness m and energy thickness e is_________________?
(A) d > m > e
(B) d > e > m
(C) e > m > d
(D) e > d > m
If x is the distance from leading edge, then the boundary layer thickness in laminar flow varies as________________?
(A) x
(B) x
(C) x
(D) x/7