GATE Prev Year : Fluid Mechanics Test-5

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Question 1

The velocity components in the x and y directions of a two dimensional potential flow are u and v, respectively, then is equal to

• A
• B
• C
• D

Question 2

A phenomenon is modeled using n dimensional variables with k primary dimensions. The number of non-dimensional variables is

• Ak
• Bn
• Cn-k
• Dn+k

Question 3

Air flows through a venturi and into atmosphere. Air density is ρ; atmospheric pressure is P_a; throat diameter is D_t; exit diameter is D and exit velocity is U. the throat is connected to a cylinder containing a frictionless piston attached to a spring. The spring constant is k. the bottom surface of the piston is exposed to atmosphere. Due to the flow, the piston moves by distance x. assuming incompressible frictionless flow, x is

• A
• B
• C
• D

Question 4

What will be the total force in y direction in a pipe shown?

• AF_∑ỵ = 0
• BF_∑ỵ = u₂
• CF_∑ỵ = u₁
• DF_∑ỵ = u₁ + u₂

Question 5

Match the following

• A P – 2 Q – 1 R – 7 S – 6
• B P – 3 Q – 1 R – 5 S – 7
• C P – 1 Q – 3 R – 1 S – 5
• D P – 3 Q – 4 R – 6 S – 7

Question 6

Match the following

• AP-U; Q-X; R-V; S-Z; T-W
• BP-Y; Q-W; R-Z; S-U; T-V
• CP-Y; Q-W; R-Z; S-U; T-X
• DP-W; Q-X; R-Z; S-U; T-V

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