A. always above the centre line of pipe
B. never above the energy grade line
C. always sloping downward in the direction of flow
D. all of the above
Related Mcqs:
- 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 - In a two dimensional incompressible steady flow around an airfoil, the stream lines are 2 cm apart at a great distance from the airfoil, where the velocity is 30 m/sec. The velocity near the airfoil, where the stream lines are 1.5 cm apart, is_________________?
A. 22.5 m/sec
B. 33 m/sec
C. 40 m/sec
D. 90 m/sec - Coefficient of contraction for an external cylindrical mouthpiece is_________________?
A. 1.00
B. 0.855
C. 0.7H
D. 0.611 - The Prartdtl mixing length is_________________?
A. zero at the pipe wall
B. maximum at the pipe wall
C. independent of shear stress
D. none of the above - 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 - A closed tank containing water is moving in a horizontal direction along a straight line at a constant speed. The tank also contains a steel ball and a bubble of air. If the tank is decelerated horizontally, then________________?
1. the ball will move to the front
2. the bubble will move to the front
3. the ball will move to the rear
4. the bubble will move to the rear
Find out which of the above statements are correct ?A. (1) and (2)
B. (1)and(4)
C. (2) and (3)
D. (3) and (4) - The horizontal component of force on a curved surface is equal to the_______________?
A. product of pressure intensity at its centroid and area
B. force on a vertical projection of the curved surface
C. weight of liquid vertically above the curved surface
D. force on the horizontal projection of the curved surface - Size of a venturimeter is specified by________________?
A. pipe diameter
B. throat diameter
C. angle of diverging section
D. both pipe diameter as well as throat diameter - 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 - The theoretical value of coefficient of contraction of a sharp edged orifice is_______________?
A. 0.611
B. 0.85
C. 0.98
D. 1.00
