Venturimeters, orificemeters and nozzles are used to measure the fluid discharge from a pipeline. The average fluid velocity in a pipeline can be measured by a/an (A) Weir (B) Hot wire anemometer (C) Cup and vane anemometer (D) None of these

Venturimeters, orificemeters and nozzles are used to measure the fluid
discharge from a pipeline. The average fluid velocity in a pipeline can be
measured by a/an
(A) Weir
(B) Hot wire anemometer
(C) Cup and vane anemometer
(D) None of these
by

1 Answer

Answer :

(B) Hot wire anemometer
by

Related questions

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

Hot wire anemometer is used to measure (A) Pressure in gases (B) Liquid discharge (C) Pressure in liquids (D) Gas velocities

Description : Hot wire anemometer is used to measure (A) Pressure in gases (B) Liquid discharge (C) Pressure in liquids (D) Gas velocities

Last Answer : Answer: Option D

Hot wire anemometer is used to measure the (A) Velocity of liquids (B) Temperature of liquids (C) Velocity of gases (D) Pressure of liquids

Description : Hot wire anemometer is used to measure the (A) Velocity of liquids (B) Temperature of liquids (C) Velocity of gases (D) Pressure of liquids

Last Answer : (C) Velocity of gases

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

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

The most suitable flow measuring device for the fluid flow measurement in a very large diameter pipeline is a (A) Weir(B) Pitot tube(C) Kennison nozzle(D) V-notch

Description : The most suitable flow measuring device for the fluid flow measurement in a very large diameter pipeline is a (A) Weir (B) Pitot tube (C) Kennison nozzle (D) V-notch

Last Answer : (B) Pitot tube

Which type of flow is measured by hot wire anemometer and describe its working principle with suitable diagram.

Description : Which type of flow is measured by hot wire anemometer and describe its working principle with suitable diagram. 

Last Answer : Heat transfer flowmeters this type of flowmeter measures the rise in temperature of the fluid after a known amount of heat has been added to it. Its theory is based upon the specific heat equation ... a supply so as to maintain the wire temperature constant, when the amount of heat transfer varies

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

A weir is used to measure the large water discharge rate from a river or from an open channel. A weir is not of __________ shape. (A) Circular (B) Rectangular (C) Triangular (D) Trapezoidal

Description : A weir is used to measure the large water discharge rate from a river or from an open channel. A weir is not of __________ shape. (A) Circular (B) Rectangular (C) Triangular (D) Trapezoidal

Last Answer : (A) Circular

What is a vane anemometer?

Description : What is a vane anemometer?

Last Answer : Need answer

For attaining maximum efficiency, a Francis turbine runner is so designed as to result in radial discharge at exit. This is done by : a) Providing runner vane angle at inlet as 90o b) Providing guide vane angle at inlet as 90o c) Providing runner vane angle at exit as 90o d) Designing for absolute velocity at outlet to be inclined at 90o to direction of vane there

Description : For attaining maximum efficiency, a Francis turbine runner is so designed as to result in radial discharge at exit. This is done by : a) Providing runner vane angle at inlet as 90o b) Providing ... 90o d) Designing for absolute velocity at outlet to be inclined at 90o to direction of vane there

Last Answer : d) Designing for absolute velocity at outlet to be inclined at 90o to direction of vane there

Most important method for calculating discharge for planning a water supply project, is (A) Velocity area method (B) Weir or spillway method (C) Use of venturi-meter (D) Using power plant consumption

Description : Most important method for calculating discharge for planning a water supply project, is  (A) Velocity area method  (B) Weir or spillway method  (C) Use of venturi-meter  (D) Using power plant consumption 

Last Answer : (A) Velocity area method

A control meter is preferred to a weir because (A) It measures the discharge even in silt Leiden streams (B) The velocity of approach of the channel increases above the control, and thus removes the silt completely (C) It is not damaged by floating debris (D) All the above

Description : A control meter is preferred to a weir because (A) It measures the discharge even in silt Leiden streams (B) The velocity of approach of the channel increases above the control, and thus removes the silt completely (C) It is not damaged by floating debris (D) All the above

Last Answer : Answer: Option D

The discharge over a rectangular weir, considering the velocity of approach, is (whereH1 = H + Ha = Total height of water above the weir, H = Height of water over the crest of the weir, and Ha = Height of water due to velocity of approach) (A) (2/3) Cd × L. 2g [H1 - Ha] (B) (2/3) Cd × L. 2g [H1 3/2 - Ha 3/2] (C) (2/3) Cd × L. 2g [H1 2 - Ha 2 ] (D) (2/3) Cd × L. 2g [H1 5/2 - Ha 5/2]

Description : The discharge over a rectangular weir, considering the velocity of approach, is (whereH1 = H + Ha = Total height of water above the weir, H = Height of water over the crest of the weir, and Ha = Height of water due to velocity of ... 2g [H1 2 - Ha 2 ] (D) (2/3) Cd L. 2g [H1 5/2 - Ha 5/2]

Last Answer : Answer: Option B

In hot wire anemometer used for gas flow measurement, the wire is normally made of (A) Copper(B) Platinum(C) Constantan(D) Chromium

Description : In hot wire anemometer used for gas flow measurement, the wire is normally made of (A) Copper (B) Platinum (C) Constantan (D) Chromium

Last Answer : (B) Platinum

The resistance wire used in a hot wire anemometer for conducting electrical current is made of (A) Copper (B) Tungsten (C) Chromium (D) Aluminium

Description : The resistance wire used in a hot wire anemometer for conducting electrical current is made of (A) Copper (B) Tungsten (C) Chromium (D) Aluminium

Last Answer : (B) Tungsten

26. Air velocity in ducts can be measured by using and manometer a) Orifice meter b) Borden gauge c) Pitot tube d) Anemometer

Description : Air velocity in ducts can be measured by using and manometer a) Orifice meter b) Borden gauge c) Pitot tube d) Anemometer

Last Answer : Pitot tube

Which of the following instrument can be used for measuring speed of a submarine moving in deep sea? (A) Venturimeter (B) Orifice plate (C) Hot wire anemometer (D) Pitot tube

Description : Which of the following instrument can be used for measuring speed of a submarine moving in deep sea? (A) Venturimeter (B) Orifice plate (C) Hot wire anemometer (D) Pitot tube

Last Answer : Answer: Option D

Explain working of 'hot wire anemometer with the help of diagram.

Description : Explain working of 'hot wire anemometer with the help of diagram. 

Last Answer : Diagram : Working: The hot-wire anemometer is a fine resistance wire heated by a current passing through it. If a cooler fluid flows past the wire, heat is removed from it by the ... and responsive to high-frequency change in flow rate. One of its main application is aerodynamic research.

Velocity of liquid hydrocarbon fuels in a pipeline cannot be measured by magnetic flow-meters, because their __________ is very low/small. (A) Thermal conductivity (B) Electrical conductivity (C) Specific gravity

Description : Velocity of liquid hydrocarbon fuels in a pipeline cannot be measured by magnetic flow-meters, because their __________ is very low/small. (A) Thermal conductivity (B) Electrical conductivity (C) Specific gravity

Last Answer : (C) Specific gravity

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

Which of the following factors does not contribute to the pressure drop in a pipeline? (A) Velocity of fluid (B) Size of pipe (C) Length of pipe and number of bends (D) None of these

Description : Which of the following factors does not contribute to the pressure drop in a pipeline? (A) Velocity of fluid (B) Size of pipe (C) Length of pipe and number of bends (D) None of these

Last Answer : (D) None of these

Instrument used to measure the force and velocity of the wind is – (1) Ammeter (2) Anemometer (3) Altimeter (4) Audiometer

Description : Instrument used to measure the force and velocity of the wind is – (1) Ammeter (2) Anemometer (3) Altimeter (4) Audiometer

Last Answer : (2) Anemometer Explanation: An anemometer is a device for measuring wind speed, and is a common weather station instrument. The term is derived from the Greek word anemos, meaning wind, and ... between the pressure and the speed, an anemometer designed for one will give information about both.

Anemometer is used to measure – (1) wind direction (2) wind velocity (3) pressure gradient (4) wind speed and time

Description : Anemometer is used to measure – (1) wind direction (2) wind velocity (3) pressure gradient (4) wind speed and time

Last Answer : (2) wind velocity Explanation: An anemometer is a device for measuring wind speed, and is a common weather station instrument. The first known description of an anemometer was given by Leon Battista Alberti around 1450.

Anemometer is used to measure (1) wind direction (2) wind velocity (3) pressure gradient (4) wind speed and time

Description : Anemometer is used to measure (1) wind direction (2) wind velocity (3) pressure gradient (4) wind speed and time

Last Answer : wind velocity

Instrument used to measure the force and velocity of the wind is (1) Ammeter (2) Anemometer (3) Altimeter (4) Audiometer

Description : Instrument used to measure the force and velocity of the wind is (1) Ammeter (2) Anemometer (3) Altimeter (4) Audiometer

Last Answer : Anemometer

The discharge through a V-notch weir varies as (A) H3/2 (B) H1/2 (C) H5/2 (D) H2/3

Description : The discharge through a V-notch weir varies as (A) H3/2 (B) H1/2 (C) H5/2 (D) H2/3

Last Answer : (C) H5/2

06. The formula for discharge over a sharp-crested weir and Ogee weir is same as that of a rectangular weir. A) Agree B) Disagree

Description : 06. The formula for discharge over a sharp-crested weir and Ogee weir is same as that of a rectangular weir. A) Agree B) Disagree

Last Answer : A

09. According to Bazin, the coefficient of discharge varies with the height of water over the sill of a weir. A) Correct B) Incorrect

Description : 09. According to Bazin, the coefficient of discharge varies with the height of water over the sill of a weir. A) Correct B) Incorrect

Last Answer : A

The Francis formula for the discharge over Cipoletti weir is (A) 1.84 LH1/2 (B) 1.84 LH (C) 1.84 LH3/2 (D) 1.84 LH5/

Description : The Francis formula for the discharge over Cipoletti weir is (A) 1.84 LH1/2 (B) 1.84 LH (C) 1.84 LH3/2 (D) 1.84 LH5/

Last Answer : Answer: Option C

According to Bazin's formula, the discharge over a rectangular weir is mL2g x H 3/2where m is equal to (A) 0.405 + (0.003/H) (B) 0.003 + (0.405/H) (C) 0.405 + (H/0.003) (D) 0.003 + (H/0.405)

Description : According to Bazin's formula, the discharge over a rectangular weir is mL2g x H 3/2where m is equal to (A) 0.405 + (0.003/H) (B) 0.003 + (0.405/H) (C) 0.405 + (H/0.003) (D) 0.003 + (H/0.405)

Last Answer : Answer: Option A

In a broad-crested weir, the discharge is maximum if the head of water on the downstream side of weir is __________ the head of water on the upstream side of weir. (A) Equal to (B) One-third (C) Two-third (D) Three-fourth

Description : In a broad-crested weir, the discharge is maximum if the head of water on the downstream side of weir is __________ the head of water on the upstream side of weir. (A) Equal to (B) One-third (C) Two-third (D) Three-fourth

Last Answer : Answer: Option C

When the coefficient of discharge (Cd) is 0.623, then the general equation for discharge over a rectangular weir is (A) 1.84(L - 0.1nH)H 3/2 (B) 1.84(L - nH)H 2 (C) 1.84(L - 0.1nH)H 5/2 (D) 1.84(L - nH)H 3

Description : When the coefficient of discharge (Cd) is 0.623, then the general equation for discharge over a rectangular weir is (A) 1.84(L - 0.1nH)H 3/2 (B) 1.84(L - nH)H 2 (C) 1.84(L - 0.1nH)H 5/2 (D) 1.84(L - nH)H 3

Last Answer : Answer: Option A

The maximum discharge over a broad crested weir is (A) 0.384 Cd × L × H1/2 (B) 0.384 Cd × L × H3/2 (C) 1.71 Cd × L × H1/(D) 1.71 Cd × L × H 3/

Description : The maximum discharge over a broad crested weir is (A) 0.384 Cd × L × H1/2 (B) 0.384 Cd × L × H3/2 (C) 1.71 Cd × L × H1/ (D) 1.71 Cd × L × H 3/

Last Answer : Answer: Option D

The absolute percentage error in the computed discharge over a rectangular weir corresponding to an absolute error of 1.5 % in the measurement of head over the sill of the weir would be : (a) 1.5 (b) 2.25 (c) 2.5 (d) 3.75

Description : The absolute percentage error in the computed discharge over a rectangular weir corresponding to an absolute error of 1.5 % in the measurement of head over the sill of the weir would be : (a) 1.5 (b) 2.25 (c) 2.5 (d) 3.75

Last Answer : (b) 2.25

In case of unsteady fluid flow, conditions & flow pattern change with the passage of time at a position in a flow situation. Which of the following is an example of unsteady flow? (A) Discharge of water by a centrifugal pump being run at a constant rpm (B) Water flow in the suction and discharge pipe of a reciprocating pump (C) Water discharge from a vertical vessel in which constant level is maintained (D) Low velocity flow of a highly viscous liquid through a hydraulically smooth pipe

Description : In case of unsteady fluid flow, conditions & flow pattern change with the passage of time at a position in a flow situation. Which of the following is an example of unsteady flow? (A) ... level is maintained (D) Low velocity flow of a highly viscous liquid through a hydraulically smooth pipe

Last Answer : (B) Water flow in the suction and discharge pipe of a reciprocating pump

What instrument is used to measure atmospheric pressure?  A. Pitot tube  B. Wind vane  C. Barometer  D. Manometer

Description : What instrument is used to measure atmospheric pressure?  A. Pitot tube  B. Wind vane  C. Barometer  D. Manometer

Last Answer : Barometer

Speed of wind is measured by – (1) barometer (2) hygrometer (3) thermometer (4) anemometer

Description : Speed of wind is measured by – (1) barometer (2) hygrometer (3) thermometer (4) anemometer

Last Answer : (4) anemometer Explanation: An anemometer is a device for measuring wind speed, and is a common weather station instrument. The term is derived from the Greek word anemos, meaning wind, ... aerodynamics. The first known description of an anemometer was given by Leon Battista Alberti around 1450.

Electric current is measured by (1) Voltmeter (2) Anemometer (3) Commutator (4) Ammeter

Description : Electric current is measured by (1) Voltmeter (2) Anemometer (3) Commutator (4) Ammeter

Last Answer : (4) Ammeter

Electric current is measured using which of the following instrument ? (1) Ammeter (2) Voltmeter (3) Anemometer (4) Wattmeter

Description : Electric current is measured using which of the following instrument ? (1) Ammeter (2) Voltmeter (3) Anemometer (4) Wattmeter

Last Answer : Ammeter

Speed of wind is measured by (1) barometer (2) hygrometer (3) thermometer (4)anemometer

Description : Speed of wind is measured by (1) barometer (2) hygrometer (3) thermometer (4)anemometer

Last Answer : anemometer

The most economical channel section for the fluid flow is the one for which the discharge is maximum for a given cross-sectional area. Vertical velocity distribution in an open channel for laminar flow can be assumed to be (A) Parabolic (B) Hyperbolic (C) Straight line (D) None of these

Description : The most economical channel section for the fluid flow is the one for which the discharge is maximum for a given cross-sectional area. Vertical velocity distribution in an open channel for laminar flow can be assumed to be (A) Parabolic (B) Hyperbolic (C) Straight line (D) None of these

Last Answer : (A) Parabolic

Consider the following statements in respect of steady laminar flow through a circular pipe: 1. Shear stress is zero on the central axis of the pipe 2. Discharge varies directly with the viscosity of the fluid 3. Velocity is maximum at the centre of the pipe. 4. Hydraulic gradient varies as the square of the mean velocity of flow. Which of these statements are correct? (a) 1, 2 , 3 & 4 (b) 1 & 3 only (c) 2 & 4 only (d)3 & 4 only

Description : Consider the following statements in respect of steady laminar flow through a circular pipe: 1. Shear stress is zero on the central axis of the pipe 2. Discharge varies directly with the viscosity of the fluid 3. Velocity is maximum at the ... 2 , 3 & 4 (b) 1 & 3 only (c) 2 & 4 only (d)3 & 4 only

Last Answer : (b) 1 & 3 only

__________ is used for measuring the static pressure exerted on the wall by a fluid flowing parallel to the wall in a pipeline. (A) Venturimeter (B) Pressure gauge(C) Pitot tube(D) Orificemeter

Description : __________ is used for measuring the static pressure exerted on the wall by a fluid flowing parallel to the wall in a pipeline. (A) Venturimeter (B) Pressure gauge (C) Pitot tube (D) Orificemeter

Last Answer : (C) Pitot tube

Nature of fluid flow during the opening of a valve in a pipeline is (A) Laminar (B) Unsteady (C) Steady (D) Uniform

Description : Nature of fluid flow during the opening of a valve in a pipeline is (A) Laminar (B) Unsteady (C) Steady (D) Uniform

Last Answer : (B) Unsteady

Fluid flow in a/an __________ is an example of pressure flow. (A) Partially filled pipeline (B) Pipe (C) Open channel (D) River

Description : Fluid flow in a/an __________ is an example of pressure flow. (A) Partially filled pipeline (B) Pipe (C) Open channel (D) River

Last Answer : (B) Pipe

In case of supersonic flow of a fluid through pipeline, the 'Mach number' is (A) 0 (B) 1 (C) < 1 (D) > 1

Description : In case of supersonic flow of a fluid through pipeline, the 'Mach number' is (A) 0 (B) 1 (C) < 1 (D) > 1

Last Answer : (D) > 1

Which instrument is used to measure altitudes in aircraft’s? (1) Audiometer (2) Ammeter (3) Altimeter (4) Anemometer

Description : Which instrument is used to measure altitudes in aircraft’s? (1) Audiometer (2) Ammeter (3) Altimeter (4) Anemometer

Last Answer : (3) Altimeter Explanation: Ammeter - Measures strength of electric current. Audiometer - Measures intensity of sound. Anemometer - Measures force and velocity of wind and directions.

Which of the following instruments is used to measure humidity? (1) Kata Thermometer (2) Anemometer (3) Sling Psychrometer (4) Clinical Thermometer

Description : Which of the following instruments is used to measure humidity? (1) Kata Thermometer (2) Anemometer (3) Sling Psychrometer (4) Clinical Thermometer

Last Answer : (3) Sling Psychrometer Explanation: A psychrometer consists of two thermometers, one which is dry and one which is kept moist with distilled water on a sock or wick. The two thermometers are ... is sometimes used for field measurements, but is being replaced by more convenient electronic sensors.

The instrument used to measure the speed of the wind is – (1) Altimeter (2) Anemometer (3) Chronometer (4) Dosimeter

Description : The instrument used to measure the speed of the wind is – (1) Altimeter (2) Anemometer (3) Chronometer (4) Dosimeter

Last Answer : (2) Anemometer Explanation: An anemometer is a device for measuring wind speed, and is a common weather station instrument. The term is derived from the Greek word anemos, meaning wind, ... aerodynamics. The first known description of an anemometer was given by Leon Battista Alberti around 1450.