Fluid Machines - Interview Questions | Exam2Win

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81. 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

Explanation:

82. The length of a pipe is 1 km and its diameter is 20 cm. If the diameter of an equivalent pipe is 40 cm, then its length is

A. 32 km

B. 20 km

C. 8 km

D. 4 km

Explanation:

83. In series-pipe problems

A. the head loss is same through each pipe

B. the discharge is same through each pipe

C. a trial solution is not necessary

D. the discharge through each pipe is added to obtain total discharge

Explanation:

84. The maximum thickness of boundary layer in a pipe of radius r is

A. 0

B. r/2

C. r

D. 2r

Explanation:

85. 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

Explanation: