Which of the following is an example of laminar flow? (A) Underground flow (B) Flow past tiny bodies (C) Flow of oil in measuring instruments (D) All of these

Which of the following is an example of laminar flow?
(A) Underground flow
(B) Flow past tiny bodies
(C) Flow of oil in measuring instruments
(D) All of these
by

1 Answer

Answer :

Answer: Option D
by

Related questions

On all instruments like measuring cylinder, pipette and burette, readings are always taken at the bottom of the meniscus of liquid. This is not true for liquids like A. Oil B. Ink C. Mercury D. Seawater

Description : On all instruments like measuring cylinder, pipette and burette, readings are always taken at the bottom of the meniscus of liquid. This is not true for liquids like A. Oil B. Ink C. Mercury D. Seawater

Last Answer : Mercury

List the classification of temperature measuring instruments with one example each.

Description : List the classification of temperature measuring instruments with one example each.

Last Answer : Classification of temperature measuring instruments with one eg 

Derivation of Thiem's formula Q = 2 (s1 - s2)/2.3 log10 (r2/r1) is based on the assumption (A) The aquifer is homogeneous, isotropic and of infinite depth and area (B) The well is sunk through the full depth of the aquifer (C) The flow lines are radial and horizontal, and the flow is laminar (D) All the above

Description : Derivation of Thiem's formula Q = 2 (s1 - s2)/2.3 log10 (r2/r1) is based on the assumption  (A) The aquifer is homogeneous, isotropic and of infinite depth and area  (B) The well is sunk ... (C) The flow lines are radial and horizontal, and the flow is laminar  (D) All the above 

Last Answer : (D) All the above 

05. The flow in a pipe is laminar, when Reynold number is less than 2000. A) True B) False

Description : 05. The flow in a pipe is laminar, when Reynold number is less than 2000. A) True B) False

Last Answer : A

A flow in which the viscosity of fluid is dominating over the inertia force is called (A) Steady flow (B) Unsteady flow (C) Laminar flow (D) Turbulent flow

Description : A flow in which the viscosity of fluid is dominating over the inertia force is called (A) Steady flow (B) Unsteady flow (C) Laminar flow (D) Turbulent flow

Last Answer : Answer: Option C

Flow occurring in a pipeline when a valve is being opened is (A) Steady (B) Unsteady (C) Laminar (D) Vortex

Description : Flow occurring in a pipeline when a valve is being opened is (A) Steady (B) Unsteady (C) Laminar (D) Vortex

Last Answer : Answer: Option B

General energy equation holds for (A) Steady flow (B) Turbulent flow (C) Laminar flow (D) Non-uniform flow

Description : General energy equation holds for (A) Steady flow (B) Turbulent flow (C) Laminar flow (D) Non-uniform flow

Last Answer : Answer: Option D

When the flow parameters at any given instant remain same at every point, then flow is said to be (A) Quasi-static (B) Steady state (C) Laminar (D) Uniform

Description : When the flow parameters at any given instant remain same at every point, then flow is said to be (A) Quasi-static (B) Steady state (C) Laminar (D) Uniform

Last Answer : Answer: Option D

The velocity at which the laminar flow stops, is known as (A) Velocity of approach (B) Lower critical velocity (C) Higher critical velocity (D) None of these

Description : The velocity at which the laminar flow stops, is known as (A) Velocity of approach (B) Lower critical velocity (C) Higher critical velocity (D) None of these

Last Answer : Answer: Option B

A large Reynold number is indication of (A) Smooth and streamline flow (B) Laminar flow (C) Steady flow (D) Highly turbulent flow

Description : A large Reynold number is indication of (A) Smooth and streamline flow (B) Laminar flow (C) Steady flow (D) Highly turbulent flow

Last Answer : Answer: Option D

Normal depth in open channel flow is the depth of flow corresponding to (A) Steady flow (B) Unsteady flow (C) Laminar flow (D) Uniform flow

Description : Normal depth in open channel flow is the depth of flow corresponding to (A) Steady flow (B) Unsteady flow (C) Laminar flow (D) Uniform flow

Last Answer : Answer: Option D

For pipes, laminar flow occurs when Reynolds number is (A) Less than 2000 (B) Between 2000 and 4000 (C) More than 4000 (D) Less than 4000

Description : For pipes, laminar flow occurs when Reynolds number is (A) Less than 2000 (B) Between 2000 and 4000 (C) More than 4000 (D) Less than 4000

Last Answer : Answer: Option A

During the opening of a valve in a pipe line, the flow is (A) Steady (B) Unsteady (C) Uniform (D) Laminar

Description : During the opening of a valve in a pipe line, the flow is (A) Steady (B) Unsteady (C) Uniform (D) Laminar

Last Answer : Answer: Option B

The velocity at which the flow changes from laminar flow to turbulent flow is called (A) Critical velocity (B) Velocity of approach (C) Sub-sonic velocity (D) Super-sonic velocity

Description : The velocity at which the flow changes from laminar flow to turbulent flow is called (A) Critical velocity (B) Velocity of approach (C) Sub-sonic velocity (D) Super-sonic velocity

Last Answer : Answer: Option A

The flow in a pipe is neither laminar nor turbulent when Reynold number is (A) Less than 2000 (B) Between 2000 and 2800 (C) More than 2800 (D) None of these

Description : The flow in a pipe is neither laminar nor turbulent when Reynold number is (A) Less than 2000 (B) Between 2000 and 2800 (C) More than 2800 (D) None of these

Last Answer : Answer: Option B

The loss of head due to viscosity for laminar flow in pipes is (where d = Diameter of pipe, l = Length of pipe, v w = Specific weight of the flowing liquid) (A) 4 (B) 8 (C) 16 (D) 32

Description : The loss of head due to viscosity for laminar flow in pipes is (where d = Diameter of pipe, l = Length of pipe, v w = Specific weight of the flowing liquid) (A) 4 (B) 8 (C) 16 (D) 32

Last Answer : Answer: Option D

The loss of pressure head in case of laminar flow is proportional to (A) Velocity (B) (Velocity)2 (C) (Velocity)3 (D) (Velocity)4

Description : The loss of pressure head in case of laminar flow is proportional to (A) Velocity (B) (Velocity)2 (C) (Velocity)3 (D) (Velocity)4

Last Answer : Answer: Option A

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

Which of these is a tiny, cylindrical, multi-celled carbon tube used for minimizing instruments used in space applications?

Description : Which of these is a tiny, cylindrical, multi-celled carbon tube used for minimizing instruments used in space applications?

Last Answer : nanotube

For determining the velocity of flow of underground water, the most commonly used non￾empirical formula is (A) Darcy's formula (B) Slichter's formula (C) Hazen's formula (D) Lacy's formula

Description : For determining the velocity of flow of underground water, the most commonly used non￾empirical formula is  (A) Darcy's formula  (B) Slichter's formula  (C) Hazen's formula  (D) Lacy's formula 

Last Answer : (A) Darcy's formula 

Pick up the incorrect statement from the following: (A) The net amount of water which joins the surface streams in a catchment, is known as surface run-off (B) The amount of water which joins the stream from the underground water, is called base flow (C) The yearly run off in cm depth over the catchment, is termed as the yield of the drainage basin(D) None of these

Description : Pick up the incorrect statement from the following:  (A) The net amount of water which joins the surface streams in a catchment, is known as  surface run-off  (B) The amount of water which ... over the catchment, is termed as the yield of the drainage  basin  (D) None of these

Last Answer : (D) None of these

Current measuring instruments must always be connected in _____________. A. series with a circuit B. parallel with a circuit C. series-parallel with a circuit D. delta with the shunt

Description : Current measuring instruments must always be connected in _____________. A. series with a circuit B. parallel with a circuit C. series-parallel with a circuit D. delta with the shunt

Last Answer : Answer: A

Name the instruments used for measuring each of the following: (i) Pressure (ii) Voltage (iii) Purity of milk (iv) Temperature (v) Velocity of wind

Description : Name the instruments used for measuring each of the following: (i) Pressure (ii) Voltage (iii) Purity of milk (iv) Temperature (v) Velocity of wind

Last Answer : Answers: (i). Barometer (ii). Voltmeter (iii). Lactometer (iv). Thermometer (v). Anemometer

What are the possible errors in induction (energy meter) measuring instruments?

Description : What are the possible errors in induction (energy meter) measuring instruments?

Last Answer : a. Phase error: Field flux in induction meter does not lag 90° behind the supply voltage due to its resistance. This can be adjusted by copper shading rings, which are placed at the central limb of the ... to prevent rotation, when one of the holes comes under one of the pole of the shunt magnet.

What are the operating principles of electrical measuring instruments?

Description : What are the operating principles of electrical measuring instruments?

Last Answer : a. Magnetic effect. b. Electro dynamic effect. c. Electro magnetic effect. d. Thermal effect. e. Chemical effect. f. Electro static effect.

What are the classifications of electrical measuring instruments?

Description : What are the classifications of electrical measuring instruments?

Last Answer : a. Absolute instruments. These instruments give the value of the quantity to be measure in terms of the constant of the instrument and their deflection only. There is no any calibrated scale. b. ... to be measured with the deflection of needle or pointer of that meter over a calibrated scale.

Vibration measuring instruments are classified on the basis of ____________. (A) contact between the vibrating system and measuring instrument (B) the requirement of power source (C) method of measurements (D) all of the above

Description : Vibration measuring instruments are classified on the basis of ____________. (A) contact between the vibrating system and measuring instrument (B) the requirement of power source (C) method of measurements (D) all of the above

Last Answer : (D) all of the above

The instruments which are used to measure the ___________ of a vibrating body are called vibration measuring instrument. (A) displacement (B) velocity (C) acceleration (D) all of the above

Description : The instruments which are used to measure the ___________ of a vibrating body are called vibration measuring instrument. (A) displacement (B) velocity (C) acceleration (D) all of the above

Last Answer : (D) all of the above

In what manner are voltage-measuring instruments connected to the circuit to be measured?

Description : In what manner are voltage-measuring instruments connected to the circuit to be measured?

Last Answer : In parallel.

In what manner are current-measuring instruments connected to a circuit?

Description : In what manner are current-measuring instruments connected to a circuit?

Last Answer : In series.

Music wires are concerned with a. musical instruments b. tuning forks c. springs d. measuring instruments

Description : Music wires are concerned with a. musical instruments b. tuning forks c. springs d. measuring instruments

Last Answer : c. springs

Define calibration of instruments. Explain why calibration is needed for measuring instruments.

Description : Define calibration of instruments. Explain why calibration is needed for measuring instruments.

Last Answer : Calibration - It is a process of estimating the value of a quantity by comparing that quantity with a standard quantity. Need of calibration: - Calibration defines the accuracy and quality ... aim of calibration is to minimize any measurement uncertainty by ensuring the accuracy of test equipment.

Compare floor inspection and centralized inspection on the basis of (i) Definition. (ii) Measuring instruments used (iii) Suitability. (iv) Mode of inspection.

Description : Compare floor inspection and centralized inspection on the basis of (i) Definition. (ii) Measuring instruments used (iii) Suitability. (iv) Mode of inspection.

Last Answer : Parameters Floor Inspection Centralized Inspection Definition. Inspection is done at the place where the part is made or assembled is called floor inspection. The inspection is done ... Mode of inspection. Online inspection is possible Offline inspection needs to be done.

Enlist the names of different pressure measuring instruments.

Description : Enlist the names of different pressure measuring instruments.

Last Answer : Pressure measuring instruments: LVDT, bellows pressure gauge, diaphragm pressure gauge, strain gauge, Force balance pressure gauge (Dead weight pressure gauge) Bourdon tube pressure gauge, Mc Leod gauge etc.

Write the names of different temperature measuring instruments.

Description : Write the names of different temperature measuring instruments.

Last Answer : Temperature measuring instruments: RTD, thermocouple, thermistor, mercury in-glass thermometer, bimetallic thermometer, radiation pyrometer, optical pyrometer

State the purpose of calibration of measuring instruments. Explain the procedure of calibration of D.C. voltmeter by using D.C. potentiometer.

Description : State the purpose of calibration of measuring instruments. Explain the procedure of calibration of D.C. voltmeter by using D.C. potentiometer.

Last Answer : Purpose of calibration : Calibration is the process of evaluating and adjusting the precision and accuracy of measuring equipment. Proper calibration of an instrument allows people to have a safe ... calibration curve can be drawn by plotting the percentage error against the measured voltages. 

Describe different types of errors in analog measuring instruments.

Description : Describe different types of errors in analog measuring instruments. 

Last Answer : Types of Errors in Analog Measuring Instruments: A) Gross error: These are due to mistakes on the part of person using the instrument. B) Systematic Error: It has three sub types as ... multiplying factor. C) Random error: These persist even after gross and systematic errors are removed.

Electrical Measuring Instruments

Description : Electrical Measuring Instruments

Last Answer : Electrical Measuring Instruments

calibration and the need of calibration for measuring instruments.

Description : calibration and the need of calibration for measuring instruments.

Last Answer : Calibration - It is a process of estimating the value of a quantity by comparing that quantity with a standard quantity.    Need of calibration: - Calibration defines the accuracy and ... aim of calibration is to minimize any measurement uncertainty by ensuring the accuracy of test equipment.

Explain the essential toques in analog type measuring instruments.

Description : Explain the essential toques in analog type measuring instruments.

Last Answer : List of torques in analog instruments:  1. Deflecting torque  2. Controlling / Restraining torque.  3. Damping torque.  1. Deflecting torque: To create deflection proportional to ... the speed higher will be the damping torque bringing the pointer to the equilibrium position quickly. 

State two purposes of calibration of measuring instruments.

Description : State two purposes of calibration of measuring instruments.

Last Answer : Purposes of calibration of measuring instruments: - The purpose of calibration is to ensure that readings of an instrument are consistent with other instruments. It is also important in determining the ... will need to be calibrated periodically to make sure it can function properly and safely. 

List three types of errors in measuring instruments. Give reasons of occurring for any one of them.

Description : List three types of errors in measuring instruments. Give reasons of occurring for any one of them.

Last Answer : Types of errors in measuring instruments:  A) Gross error: These are due to mistakes on the part of person using the instrument.  B) Systematic Error: i) Instrumental Error: These ... multiplying factor.  C) Random error: These persist even after gross and systematic errors are removed.

Define following terms related to measuring instruments: i) Sensitivity ii) Selectivity.

Description : Define following terms related to measuring instruments: i) Sensitivity ii) Selectivity.

Last Answer : i) Sensitivity: It is the ratio of the change in output signal to the change in input signal of quantity being measured.  ii) Selectivity: It is the term to describe fulfillment of the requirements of measurement by an instrument to be suitable for use in a given situation. 

List out any four effects of electric current used in measuring instruments & write name of meter working on it.

Description : List out any four effects of electric current used in measuring instruments & write name of meter working on it.

Last Answer : Effects of Electric Current used in measuring instruments:  1. Magnetic Effect: PMMC and Moving Iron type Ammeters, voltmeter and Dynamometer type wattmeters etc.  2. Electromagnetic induction ... . Electrostatic effect: Voltmeters.  5. Hall Effect: Flux meter, Poynting vector wattmeter.

Describe systematic errors in measuring instruments.

Description : Describe systematic errors in measuring instruments. 

Last Answer : Systematic errors: -  ➢ Instrumental Error: These errors are caused due to the mechanical structure of measuring instrument.  a) Inherent shortcomings of instruments: Instrument may read ... or electrostatic fields.  ➢ Observational Error: Parallax errors, incorrect multiplying factor. 

List any four effects employed in measuring instruments.

Description : List any four effects employed in measuring instruments.

Last Answer : Effects Employed in Measuring Instruments: 1. Magnetic Effect 2. Electromagnetic induction 3. Heating effect 4. Electrostatic effect 5. Hall Effect 

The function of input attenuators in measuring instruments, like VTVM and CRO, is to

Description : The function of input attenuators in measuring instruments, like VTVM and CRO, is to (a) Increase the input impedance (b) Attenuate the frequency range (c) Attenuate the input signal amplitude without altering the frequency contents (d) Attenuate the input impedance

Last Answer : The function of input attenuators in measuring instruments, like VTVM and CRO, is to Attenuate the input signal amplitude without altering the frequency contents

Moving iron instruments can be used for measuring

Description : Moving iron instruments can be used for measuring (1) Direct currents and voltages (2) Radio frequency currents (3) A.C currents and voltages (4) Both (a) and (c)

Last Answer : moving iron instruments areused to measure A.C curents &  voltages

Which of the following instruments is used to measure flow on the application of Bernoulli's theorem? (A) Venturimeter (B) Orifice plate (C) Nozzle (D) All of the above

Description : Which of the following instruments is used to measure flow on the application of Bernoulli's theorem? (A) Venturimeter (B) Orifice plate (C) Nozzle (D) All of the above

Last Answer : Answer: Option D

During agitation of liquids, power consumption during laminar flow is not proportional to the (A) Density of the liquid (B) Viscosity of the liquid (C) Cube of impeller diameters (D) Square of rotational speed

Description : During agitation of liquids, power consumption during laminar flow is not proportional to the (A) Density of the liquid (B) Viscosity of the liquid (C) Cube of impeller diameters (D) Square of rotational speed

Last Answer : (A) Density of the liquid