Project ForgeFluid Mechanics
Mechanical Operations
GATE 2014
Medium
Match the following: P. Turbulence, Q. NPSH, R. Ergun equation, S. Rotameter, T. Power number — I. Reciprocating pump, II. Packed bed, III. Fluctuating velocity, IV. Impeller, V. Vena contracta
- P−III, R−II, T−IV
- BQ−V, R−II, S−III
- CP−III, R−IV, T−II
- DQ−III, S−V, T−IV
Explanation
Turbulence is characterized by fluctuating velocity (P-III). The Ergun equation describes pressure drop through a packed bed (R-II). Power number characterizes the power drawn by a mixing impeller (T-IV). (NPSH relates to pump cavitation and rotameters exploit a variable-area vena-contracta-like flow constriction, but only the P/R/T pairs are asked about in this option.)
Source: GATE CH 2014 (2014)
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