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

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
by

1 Answer

Answer :

Option A
by

Related questions

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

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

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

Last Answer : (D) Constant

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

Description : 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

Last Answer : (A) Pitot tube

Which of the following can be used for the direct measurement of volumetric flow rate of slurry? (A) Venturimeter (B) Orificemeter (C) Rotameter (D) Pitot tube

Description : Which of the following can be used for the direct measurement of volumetric flow rate of slurry? (A) Venturimeter (B) Orificemeter (C) Rotameter (D) Pitot tube

Last Answer : (C) Rotameter

Flow rate of high velocity flue gas discharged through a stack to the atmosphere can be most conveniently measured by a (A) Pitot tube (B) Manometer (C) Rotameter (D) None of these

Description : Flow rate of high velocity flue gas discharged through a stack to the atmosphere can be most conveniently measured by a (A) Pitot tube (B) Manometer (C) Rotameter (D) None of these

Last Answer : (A) Pitot tube

In a/an __________, the flow rate of fluids is obtained by measuring the difference between the impact and the static pressure. (A) Rotameter (B) Pitot tube (C) Venturimeter (D) Flow nozzle

Description : In a/an __________, the flow rate of fluids is obtained by measuring the difference between the impact and the static pressure. (A) Rotameter (B) Pitot tube (C) Venturimeter (D) Flow nozzle

Last Answer : (B) Pitot tube

The sun rises in Arunachal Pradesh two hours before it does in Dwaraka in Gujarat. This is because the former is (a) higher in elevation than Dwaraka (b) situated further north than Dwaraka (c) situated further east (about 30º longitude) than Dwaraka (d) situated about 30 º east of Dwaraka and the earth rotates from west to east

Description : The sun rises in Arunachal Pradesh two hours before it does in Dwaraka in Gujarat. This is because the former is (a) higher in elevation than Dwaraka (b) situated further north than Dwaraka (c) situated ... than Dwaraka (d) situated about 30 º east of Dwaraka and the earth rotates from west to east

Last Answer : Ans: (d)

Which of the following may be termed as a variable orifice flow-meter? (A) Rotameter (B) Pitot tube (C) V-notch (D) All (A), (B) and (C)

Description : Which of the following may be termed as a variable orifice flow-meter? (A) Rotameter (B) Pitot tube (C) V-notch (D) All (A), (B) and (C)

Last Answer : (A) Rotameter

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

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

Last Answer : (C) Rotameter

Which of the following is used for very accurate measurement of flow of gas at low velocity? (A) Pitot tube (B) Rotameter (C) Segmental orificemeter (D) Hot wire anemometer

Description : Which of the following is used for very accurate measurement of flow of gas at low velocity? (A) Pitot tube (B) Rotameter (C) Segmental orificemeter (D) Hot wire anemometer

Last Answer : (D) Hot wire anemometer

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)

Last Answer : (A) More than

The range of a particular Rotameter can be increased by (A) Use of floats of different densities (B) No means (C) Increasing the diameter of the float (D) Decreasing the diameter of the float

Description : The range of a particular Rotameter can be increased by (A) Use of floats of different densities (B) No means (C) Increasing the diameter of the float (D) Decreasing the diameter of the float

Last Answer : (A) Use of floats of different densities

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

Speed of a submarine in deep sea & that of an aeroplane is measured by a/an (A) Pitot tube (B) Hot wire anemometer (C) Rotameter (D) Stroboscope

Description : Speed of a submarine in deep sea & that of an aeroplane is measured by a/an (A) Pitot tube (B) Hot wire anemometer (C) Rotameter (D) Stroboscope

Last Answer : (A) Pitot tube

Flow of water in a pipe about 3 metres in diameter can be measured by (A) Orifice plate (B) Venturimeter (C) Rotameter (D) Pitot tube

Description : Flow of water in a pipe about 3 metres in diameter can be measured by (A) Orifice plate (B) Venturimeter (C) Rotameter (D) Pitot tube

Last Answer : Answer: Option D

Rotameter is a device used to measure (A) Absolute pressure (B) Velocity of fluid (C) Flow (D) Rotation

Description : Rotameter is a device used to measure (A) Absolute pressure (B) Velocity of fluid (C) Flow (D) Rotation

Last Answer : Answer: Option C

Pick out the correct statement. (A) A forced vortex occurs when fluid rotates as a solid about an axis (B) In laminar flow, Newton's law of viscosity does not apply (C) A free vortex occurs, when fluid rotates as a solid (D) In turbulent flow, there are neither cross-currents nor eddies

Description : Pick out the correct statement. (A) A forced vortex occurs when fluid rotates as a solid about an axis (B) In laminar flow, Newton's law of viscosity does not apply (C) A free vortex occurs, when fluid rotates as a solid (D) In turbulent flow, there are neither cross-currents nor eddies

Last Answer : (A) A forced vortex occurs when fluid rotates as a solid about an axis

Which of the following instrument can be used for measuring speed of an aeroplane? (A) Venturimeter (B) Orifice plate (C) Pitot tube(D) Rotameter

Description : Which of the following instrument can be used for measuring speed of an aeroplane? (A) Venturimeter (B) Orifice plate (C) Pitot tube (D) Rotameter

Last Answer : Answer: Option C

Vane anemometer (A) Is an area meter (B) Is a variable head meter (C) Rotates an element at a speed determined by the velocity of the fluid inwhich the meter is immersed(D) None of these

Description : Vane anemometer (A) Is an area meter (B) Is a variable head meter (C) Rotates an element at a speed determined by the velocity of the fluid inwhich the meter is immersed (D) None of these

Last Answer : (C) Rotates an element at a speed determined by the velocity of the fluid inwhich the meter is immersed

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

Description : 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

Last Answer : (C) 269

Which is the most efficient and best for measuring very small flow rate of gases? (A) Venturimeter (B) Orificemeter (C) Rotameter (D) Flow nozzle

Description : Which is the most efficient and best for measuring very small flow rate of gases? (A) Venturimeter (B) Orificemeter (C) Rotameter (D) Flow nozzle

Last Answer : (C) Rotameter

In an extended surface heat exchanger, fluid having lower co-efficient (A) Flows through the tube (B) Flows outside the tubes (C) Can flow either inside or outside the tubes (D) Should not be used as it gives very high pressure drop

Description : In an extended surface heat exchanger, fluid having lower co-efficient (A) Flows through the tube (B) Flows outside the tubes (C) Can flow either inside or outside the tubes (D) Should not be used as it gives very high pressure drop

Last Answer : (B) Flows outside the tubes

Pick out the wrong statement. (A) The controlling resistance in case of heating of air by condensing steam is in the air film (B) The log mean temperature difference (LMTD) for counter flow and parallel flow can be theoretically same when any one of the fluids (hot or cold fluid) passes through the heat exchanger at constant temperature (C) In case of a 1 - 2 shell and tube heat exchanger, the LMTD correction factor value increases sharply, when a temperature cross occurs (D) Phase change in case of a pure fluid at a given pressure from liquid to vapor or vice-versa occurs at saturation temperature

Description : Pick out the wrong statement. (A) The controlling resistance in case of heating of air by condensing steam is in the air film (B) The log mean temperature difference (LMTD) for ... a pure fluid at a given pressure from liquid to vapor or vice-versa occurs at saturation temperature

Last Answer : (C) In case of a 1 - 2 shell and tube heat exchanger, the LMTD correction factor value increases sharply, when a temperature cross occurs

If cohesion between molecules of a fluid is greater than adhesion between fluid and glass, then the free level of fluid in a dipped glass tube will be(A) Higher than the surface of liquid (B) The same as the surface of liquid (C) Lower than the surface of liquid (D) Unpredictable

Description : If cohesion between molecules of a fluid is greater than adhesion between fluid and glass, then the free level of fluid in a dipped glass tube will be (A) Higher than the surface of liquid (B) The same as the surface of liquid (C) Lower than the surface of liquid (D) Unpredictable

Last Answer : Answer: Option C

Which is not a variable head meter? (A) Venturimeter (B) Pitot tube (C) Rotameter (D) None of these

Description : Which is not a variable head meter? (A) Venturimeter (B) Pitot tube (C) Rotameter (D) None of these

Last Answer : (C) Rotameter

Pick out the wrong statement about cavitation. (A) Sudden reduction of pressure in a fluid flow system caused by flow separation, vortex formation or abrupt closing of valve leads to cavitation (B) Cavitation may be caused due to boiling of liquid by decreasing the pressure resulting in formation & collapse of vapor cavities (C) Cavitation begins at higher static pressure and lower velocity in larger diameter pipelines resulting in audible noise(D) Large scale cavitation cannot damage pipeline, restrict fluid flow anddamage steam turbine blades

Description : Pick out the wrong statement about cavitation. (A) Sudden reduction of pressure in a fluid flow system caused by flow separation, vortex formation or abrupt closing of valve leads to cavitation ... (D) Large scale cavitation cannot damage pipeline, restrict fluid flow and damage steam turbine blades

Last Answer : (D) Large scale cavitation cannot damage pipeline, restrict fluid flow and damage steam turbine blades

Pick out the wrong statement. (A) Biological oxygen demand (B.O.D.) value of a sewerage sample is always lower than its chemical oxygen demand (C.O.D.) value (B) Environmental pollution by NOx emission is much higher by four stroke petrol engines as compared to the two stroke engines (C) Temperature in stratosphere rises with increasing altitude (D) The characteristic of a green house body is that it allows the long wavelength incoming solar radiation to come in but does not allow the short wavelength infra red radiation to escape out of the earth's atmosphere

Description : Pick out the wrong statement. (A) Biological oxygen demand (B.O.D.) value of a sewerage sample is always lower than its chemical oxygen demand (C.O.D.) value (B) Environmental pollution by ... in but does not allow the short wavelength infra red radiation to escape out of the earth's atmosphere

Last Answer : (D) The characteristic of a green house body is that it allows the long wavelength incoming solar radiation to come in but does not allow the short wavelength infra red radiation to escape out of the earth's atmosphere

A fluid is flowing inside the inner tube of a double pipe heat exchanger with diameter 'd'. For a fixed mass flow rate, the tube side heat transfer co￾efficient for turbulent flow conditions is proportional to (A) d 0.8 (B) d -0.2 (C) d -1 (D) d -1.8

Description : A fluid is flowing inside the inner tube of a double pipe heat exchanger with diameter 'd'. For a fixed mass flow rate, the tube side heat transfer co￾efficient for turbulent flow conditions is proportional to (A) d 0.8 (B) d -0.2 (C) d -1 (D) d -1.8

Last Answer : (B) d -0.2

Use of transverse baffles in a shell and tube heat exchanger is done to increase the (A) Rate of heat transfer (B) Flow velocity (C) Turbulence of shell side fluid (D) All (A), (B) and (C)

Description : Use of transverse baffles in a shell and tube heat exchanger is done to increase the (A) Rate of heat transfer (B) Flow velocity (C) Turbulence of shell side fluid (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

itot tube measures the __________ of a fluid. (A) Pressure (B) Average velocity (C) Average flow rate (D) Point velocity

Description : itot tube measures the __________ of a fluid. (A) Pressure (B) Average velocity (C) Average flow rate (D) Point velocity

Last Answer : (D) Point velocity

The continuity equation (A) Relates mass flow rate along a stream tube (B) Relates work and energy (C) Stipulates that Newton's second law of motion must be satisfied at every point in the fluid (D) None of these

Description : The continuity equation (A) Relates mass flow rate along a stream tube (B) Relates work and energy (C) Stipulates that Newton's second law of motion must be satisfied at every point in the fluid (D) None of these

Last Answer : (A) Relates mass flow rate along a stream tube

The best instrument for measuring the velocity of a stream flow is (A) Pitot tube (B) Price's current meter (C) Surface float (D) Sub-surface float

Description : The best instrument for measuring the velocity of a stream flow is (A) Pitot tube (B) Price's current meter (C) Surface float (D) Sub-surface float

Last Answer : Answer: Option B

In a carburetor the level of the fuel in the float chamber as compared to the level of the main jet in the venture is A. lower B. same C. higher D. same or higher

Description : In a carburetor the level of the fuel in the float chamber as compared to the level of the main jet in the venture is A. lower B. same C. higher D. same or higher

Last Answer : ANSWER : A

The density of seawater is greater than that of fresh water. A boat will float: w) Higher in fresh water than in seawater x) Lower in fresh water than in seawater y) At the same level in both z) Any of the above, depending upon its shape

Description : The density of seawater is greater than that of fresh water. A boat will float: w) Higher in fresh water than in seawater x) Lower in fresh water than in seawater y) At the same level in both z) Any of the above, depending upon its shape

Last Answer : ANSWER: X -- LOWER IN FRESH WATER THAN IN SEAWATER

Pick out the wrong statement. (A) For a first order consecutive reaction, a tubular flow reactor as compared to a stirred tank reactor provides higher overall selectivity(B) For an ideal mixed reactor at steady state, the exit stream has the samecomposition as fluid within the reactor and the space time is equivalent toholding time for constant density system(C) Plug flow reactor (PFR) is always smaller than mixed reactor for allpositive reaction orders for a particular duty(D) Reaction rate does not decrease appreciably as the reaction proceeds incase of an autocatalytic reaction

Description : Pick out the wrong statement. (A) For a first order consecutive reaction, a tubular flow reactor as compared to a stirred tank reactor provides higher overall selectivity(B) For an ideal ... D) Reaction rate does not decrease appreciably as the reaction proceeds in case of an autocatalytic reaction

Last Answer : (A) For a first order consecutive reaction, a tubular flow reactor as compared to a stirred tank reactor provides higher overall selectivity

For the same heat load and mass flow rate in the tube side of a shell and tube heat exchanger, one may use multipass on the tube side, because it (A) Decreases the pressure drop (B) Decreases the outlet temperature of cooling medium (C) Increases the overall heat transfer coefficient (D) None of these

Description : For the same heat load and mass flow rate in the tube side of a shell and tube heat exchanger, one may use multipass on the tube side, because it (A) Decreases the pressure drop (B) ... the outlet temperature of cooling medium (C) Increases the overall heat transfer coefficient (D) None of these

Last Answer : (C) Increases the overall heat transfer coefficient

Flow measurement in an open channel is done by a/an (A) Venturimeter (B) Orificemeter (C) Weir (D) Rotameter

Description : Flow measurement in an open channel is done by a/an (A) Venturimeter (B) Orificemeter (C) Weir (D) Rotameter

Last Answer : (C) Weir

Open channel liquid flow is most conveniently measured by a (A) Hot wire anemometer (B) Notch (C) Rotameter (D) Segmental orifice

Description : Open channel liquid flow is most conveniently measured by a (A) Hot wire anemometer (B) Notch (C) Rotameter (D) Segmental orifice

Last Answer : (B) Notch

. It is possible to integrate an automatic flow controller to a (A) Flow nozzle (B) Venturimeter (C) Rotameter (D) None of these

Description : . It is possible to integrate an automatic flow controller to a (A) Flow nozzle (B) Venturimeter (C) Rotameter (D) None of these

Last Answer : (C) Rotameter

Out of the following flow measuring devices, which one incurs themaximum installation cost as well as pressure loss? (A) Flow nozzle (B) Venturimeter (C) Rotameter (D) Orificemeter

Description : Out of the following flow measuring devices, which one incurs themaximum installation cost as well as pressure loss? (A) Flow nozzle (B) Venturimeter (C) Rotameter (D) Orificemeter

Last Answer : (B) Venturimeter

Which of the following flow measuring devices is an area meter? (A) Venturimeter (B) Orificemeter (C) Anemometer (D) Rotameter

Description : Which of the following flow measuring devices is an area meter? (A) Venturimeter (B) Orificemeter (C) Anemometer (D) Rotameter

Last Answer : (D) Rotameter

__________ heat exchanger is the most suitable, when the temperature of shell side fluid is much higher than that of tube side. (A) Single pass, fixed tube sheet (B) U-tube (C) Three pass, fixed tube sheet (D) None of these

Description : __________ heat exchanger is the most suitable, when the temperature of shell side fluid is much higher than that of tube side. (A) Single pass, fixed tube sheet (B) U-tube (C) Three pass, fixed tube sheet (D) None of these

Last Answer : (B) U-tube

Pick out the correct statement. (A) Higher is the temperature of the radiating body, higher is the wavelength of radiation (B) Logarithmic mean area is used for calculating the heat flow rate through a thick walled cylinder (C) The wavelength corresponding to maximum mono-chromatic emissive power increases with rise in temperature (D) Solid angle subtended by the finite surface at the radiating element is called the angle of incidence

Description : Pick out the correct statement. (A) Higher is the temperature of the radiating body, higher is the wavelength of radiation (B) Logarithmic mean area is used for calculating the heat flow rate ... ) Solid angle subtended by the finite surface at the radiating element is called the angle of incidence

Last Answer : (B) Logarithmic mean area is used for calculating the heat flow rate through a thick walled cylinder

If the baffle spacing in a shell and tube heat exchanger increases, then the Reynolds number of the shell side fluid (A) Remains unchanged (B) Increases (C) Increases or decreases depending on number of shell passes (D) Decreases

Description : If the baffle spacing in a shell and tube heat exchanger increases, then the Reynolds number of the shell side fluid (A) Remains unchanged (B) Increases (C) Increases or decreases depending on number of shell passes (D) Decreases

Last Answer : (D) Decreases

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

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

Last Answer : (i) Two types of ultrasonic flow meter:  ➢ Transit time flow meters (time differences) ➢ Doppler type. (ii) Write any two specifications: - 1. Accuracy 2. Linearity 3. Repeatability 4. ... for bidirectional flow 8. Excellent dynamic response 9. Good accuracy +-2% 10. o/p is electrical

The lower edge of the pitched roof, from where the rain water of the roof surface drops down, is known as (A) Hip (B) Gable (C) Ridge (D) Eaves

Description : The lower edge of the pitched roof, from where the rain water of the roof surface drops down, is known as (A) Hip (B) Gable (C) Ridge (D) Eaves

Last Answer : Answer: Option D

The speed of light with the rise in the temperature of the medium : (1) Increases (2) Decreases (3) Remains unaltered (4) Drops suddenly

Description : The speed of light with the rise in the temperature of the medium : (1) Increases (2) Decreases (3) Remains unaltered (4) Drops suddenly

Last Answer : (3) Remains unaltered Explanation: The speed of light with the rise in the temperature of the medium remains unaltered because speed of light doesn't depend on temperature. It does depend, however ... in vacuum, commonly denoted c, is a universal physical constant important in many areas of physics.

The speed of light with the rise in the temperature of the medium : (1) Increases (2) Decreases (3) Remains unaltered (4) Drops suddenly

Description : The speed of light with the rise in the temperature of the medium : (1) Increases (2) Decreases (3) Remains unaltered (4) Drops suddenly

Last Answer : Remains unaltered

The speed of the satellite increases as its height in orbit gets A. lower B. higher C. closer to the moon D. closer to the sun

Description : The speed of the satellite increases as its height in orbit gets A. lower B. higher C. closer to the moon D. closer to the sun

Last Answer : A. lower

Pick out the wrong statement. (A) Superheated steam is preferably not used for process heating because of its low heat transfer film co-efficient (B) In a shell and tube heat exchanger, the shell pressure drop is maximum for orifice baffles (C) S.I. unit of fouling factor is Watt/m2 .°K (D) Longitudinal fins are used in extended surface heat exchangers, when the direction of fluid flow is parallel to the axis of the tube

Description : Pick out the wrong statement. (A) Superheated steam is preferably not used for process heating because of its low heat transfer film co-efficient (B) In a shell and tube heat exchanger ... surface heat exchangers, when the direction of fluid flow is parallel to the axis of the tube

Last Answer : (C) S.I. unit of fouling factor is Watt/m2 .°K