Drag force on the float of a Rotameter is (where Q = flow rate of the) (A) ∝ Q (B) ∝ √Q (C) ∝ Q2 (D) Constant

Drag force on the float of a Rotameter is (where Q = flow rate of the)
(A) ∝ Q
(B) ∝ √Q
(C) ∝ Q2
(D) Constant
by

1 Answer

Answer :

(D) Constant
by

Related questions

Which of the following relationship is valid for the equilibrium position of the float in a Rotameter? (Where, Df= Drag force on the float Bf = Buoyant force on the float Wf = Weight of the float). (A) Df + Bf = Wf (B) Df = Bf + Wf (C) Df + Bf + Wf =0 (D) None of these

Description : Which of the following relationship is valid for the equilibrium position of the float in a Rotameter? (Where, Df= Drag force on the float Bf = Buoyant force on the float Wf = Weight of the float). (A) Df + Bf = Wf (B) Df = Bf + Wf (C) Df + Bf + Wf =0 (D) None of these

Last Answer : (A) Df + Bf = Wf

the fluid flow rate increases, the float of the Rotameter (A) Rises in the tube (B) Rotates at higher speed (C) Rotates at lower speed (D) Drops down in the tube

Description : the fluid flow rate increases, the float of the Rotameter (A) Rises in the tube (B) Rotates at higher speed (C) Rotates at lower speed (D) Drops down in the tube

Last Answer : Option A

In area meter (e.g., Rotameter), with increase in the fluid flow rate, the (A) Pressure drop increases linearly (B) Pressure drop is almost constant (C) Area through which fluid flows does not vary (D) None of these

Description : In area meter (e.g., Rotameter), with increase in the fluid flow rate, the (A) Pressure drop increases linearly (B) Pressure drop is almost constant (C) Area through which fluid flows does not vary (D) None of these

Last Answer : (B) Pressure drop is almost constant

In case of a Rotameter, the density of the float material is __________ that of the liquid it replaces. (A) More than (B) Less than (C) Equal to (D) Either (A) or (B)

Description : In case of a Rotameter, the density of the float material is __________ that of the liquid it replaces. (A) More than (B) Less than (C) Equal to (D) Either (A) or (B)

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Rate constant 'k' and absolute temperature 'T' are related by collision theory (for bimolecular) as (A) k ∝ T 1.5 (B) k ∝ exp(-E/RT) (C) k ∝ √T (D) k ∝ T

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The pressure head of a flow meter remains constant for (A) Venturimeter (B) Orificemeter (C) Rotameter (D) Pitot tube

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Water flow rate in a pipe of 3.5 metres diameter can be most economically and conveniently measured by a/an (A) Pitot tube (B) Venturimeter (C) Orificemeter (D) Rotameter

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A Rotameter through which air at room temperature and atmospheric pressure is flowing gives a certain reading for a flow rate of 100 cc/sec. If helium (molecular weight 4) is used and Rotameter shows the same reading, the flow rate (cc/sec) is(A) 26(B) 42(C) 269(D) 325

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What is the phase relationship of the signal at the collector of Q2 to the signal at the collector of Q, A) 0° B) 90° C) 180° D) 360°.

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Why are there jets in the midlatitudes in the upper troposphere? (a) Air is warmer in the tropics than the poles, resulting in a poleward pressure gradient that increases with increasing height. (b) Because air near the surface experiences the drag of surface friction, while air in the upper troposphere does not. (c) Due to variations in temperature between continents and ocean. (d) Due to the constant bending by the Coriolis force. (e) Both A and D are correct.

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Description : Related to ultrasonic flow meter: (i) Give any two types of it. (ii) Write any two specifications. (iii) Write two advantages over rotameter. 

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For a turbine agitated and baffled tank, operating at low Reynold's number (based on impeller diameter), the power number (Np ) varies with NRe as (A) Np ∝ NRe (B) Np ∝ √NRe (C) Np → constan(D) Np ∝ 1/NRe

Description : For a turbine agitated and baffled tank, operating at low Reynold's number (based on impeller diameter), the power number (Np ) varies with NRe as (A) Np ∝ NRe (B) Np ∝ √NRe (C) Np → constan (D) Np ∝ 1/NRe

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The diffusivity (D) in a binary gas mixture is related to the temperature (T) as (A) D ∝ T (B) D ∝ T 0.5 (C) D ∝ T 1.5 (D) D ∝ T

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Transition state theory relates the above quantities as (A) k ∝ e -E/RT (B) k ∝ T.e E/RT (C) k ∝ √T (D) k ∝ T 1.5

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For a sphere falling in the constant drag co-efficient regime, its terminal velocity depends on its diameter (D) as (A) d (B) √d (C) d 2 (D) 1/d

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In fluid flow, the boundary layer separation cannot occur (A) In case of boundaries experiencing form drag (B) At points of abrupt changes in the flow directions (C) In laminar flow (D) None of these

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Pressure drag does not depend upon the(A) Roughness of surface of the body (B) Pressure of main flow only (C) Length of the body in flow direction (D) All (A), (B) and (C)

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Pick out the wrong statement. (A) The form drag is dependent upon the occurrence of a wake (B) The shear stress at any given cross-section of a pipe for steady flow (either laminar or turbulent) varies linearly as the radial distance (C) An ideal fluid is the one, which has negligible surface tension and obeys the Newton's law of viscosity (D) Existence of the boundary layer in fluid flow is because of viscosity of the fluid

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Description : . In case of turbulent flow of fluid through a circular pipe, the (A) Mean flow velocity is about 0.5 times the maximum velocity (B) Velocity profile becomes flatter and flatter with ... , shear stresses, random orientation of fluid particles and slope of velocity profile at the wall are more

Last Answer : (D) Skin friction drag, shear stresses, random orientation of fluid particles and slope of velocity profile at the wall are more