1161. Velocity distribution for flow between wo fixed parallel plates :

A. Varies parabolically across the section *
B. Is constant over the entire cross section
C. Is Zero at the plates and increases linearly to the midplane
D. None of these

1162. While starting a centrifugal pump, its delivery valve should be kept :

A. Opened
B. Closed *
C. Either opened or closed
D. None of them

1163. Pat followed by wat jet issuing from the bottom of a water tank will be a :

A. Parabola *
B. Hyperbola
C. Horizontal straight line
D. None of them

1164. A centrifugal pump loses prime after starting .The reason of this trouble may be :

A. Incomplete priming
B. Too high a suction lift
C. Low avaialbe ,NPSH and air leaks in the suction pipe
D. All of them *

1165. Flow rate of high velocity flue gas discharged through a stack to the atmosphere can be most conveniently measured by a :

A. Pilot tube *
B. Manometer
C. Ratometer
D. None of the above

1166. Maximum theoretical suction lift for water at 15 degree centigrade by a centrifugal pump is 34ft .The same for water at 90 degree centigrade will be _______ft

A. 40
B. 34
C. 12
D. 08 *

1167. For liquid flow through a packed bed, the superficial velocity as compared to average velocity through the channel in the bed is :

A. More
B. Less *
C. equal
D. None of them

1168. Vena-contracta formed during flow of a liquid through an orificemeter has :

A. Minimum liquid cross section *
B. More diameter compared to orifies diameter
C. Minimum velocity of fluid stream
D. None of these

1169. Reciprocating pumps compared to centrifugal pumps :

A. Deliver liquid at uniform pressure
B. Can handle slurries more efficiently
C. Are not subject to air binding *
D. None of them

1170. A tube is specified by its :

A. Thickness only
B. Outer diameter only
C. Thickness and outer diameter both *
D. Inner diameter