Stoke's law is valid only if the size of particle is
(A) Less than 0.0002 mm
(B) Greater than 0.2 mm
(C) Between 0.2 mm and 0.0002 mm
(D) All of the above

1 Answer

Answer :

Answer: Option C

Related questions

Description : Stoke's law does not hold good if the size of particle is smaller than (A) 0.0002 mm (B) 0.002 mm (C) 0.02 mm (D) 0.2 mm

Last Answer : (A) 0.0002 mm

Description : Stoke's law is valid, when the particle Reynolds number is (A) < 1 (B) > 1 (C) < 5 (D) None of these

Last Answer : (A) < 1

Description : Stoke's law is valid, when NRe, p is less than (A) 2 (B) 100 (C) 2100 (D) 700

Last Answer : (A) 2

Description : The terminal velocity of a solid spherical particle falling through a stationary fluid mass in the Stoke's law range is proportional to the (A) Inverse of fluid viscosity (B) Square of particle size (C) Difference in the densities of the particle & fluid (D) All (A), (B) and (C)

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

Description : The terminal velocity of a particle moving through a fluid varies as dp n . The value of n is equal to __________ in Stoke's law regime. (A) 1 (B) 0.5 (C) 2 (D) 1.5

Last Answer : (C) 2

Description : A particle A of diameter 10 microns settles in an oil of specific gravity 0.9 and viscosity 10 poise under Stoke's law. A particle B with diameter 20microns settling in the same oil will have a settling velocity (A) ... ) One fourth as that of A (C) Twice as that of A (D) Four times as that of A

Last Answer : (B) One fourth as that of A

Description : Pick up the correct statement about silt soil from the following: (A) The silt soil has particle size from 0.02 mm to 0.06 mm (B) In organic fine grained silt soil possesses no ... The least plastic type normally consists of more or less equidimensional grains of quartz (D) All the above

Last Answer : Answer: Option D

Description : For the Stoke's law to be valid in the case of a falling sphere in a fluid, the (A) Reynolds number (based on sphere diameter) should be < 1 (B) Flow around the sphere should be in turbulent region (C) Sphere must be metallic (D) Fluid density should be constant

Last Answer : (C) Sphere must be metallic

Description : Stoke's law states that the velocity at which a grain settles out of suspension, the other factors remaining constant, is dependent upon (A) Shape of grain (B) Weight of grain (C) Size of grain (D) Shape, size and weight of grain

Last Answer : Answer: Option D

Description : Stoke's equation is valid in the Reynolds number range (A) 0.01 to 0.1 (B) 0.1 to 2 (C) 2 to 10 (D) 10 to 100

Last Answer : (A) 0.01 to 0.1

Description : The settling velocity of a spherical particle of diameter less than 0.1 mm as per Stock’s law, is A. Vs = 418 (Gs – Gw) d [(3T + 70)/100] B. Vs = 418 (Gs – Gw)d² [(3T + 70)/100] C. Vs = 218 (Gs – Gw)d² [(3T + 70)/100] D. Vs = 218 (Gs – Gw)d [(3T + 70)/100]

Last Answer : ANS: B

Description : In the plate loading test for determining the bearing capacity of soil, the size of square bearing plate should be (A) Less than 300 mm (B) Between 300 mm and 750 mm (C) Between 750 mm and 1 m (D) Greater than 1 m

Last Answer : (B) Between 300 mm and 750 mm

Description : The Minimum bar spacing should not be less than [ A ] Diameter of the largest bar [ B ] Maximum size of aggregate [ C ] Greater of diameter of the largest bar and maximum size of aggregate [ D ] Greater of diameter of the largest bar and maximum size of aggregate plus 5 mm

Last Answer : [ D ] Greater of diameter of the largest bar and maximum size of aggregate plus 5 mm

Description : When a vector is irrotational, which condition holds good? a) Stoke’s theorem gives non-zero value b) Stoke’s theorem gives zero value c) Divergence theorem is invalid d) Divergence theorem is valid

Last Answer : b) Stoke’s theorem gives zero value

Description : The proof stress in steel is the stress corresponding to the strain of [ A ] 0.2 [ B ] 0.02 [ C ] 0.002 [ D ] 0.0002

Last Answer : [ C ] 0.002

Description : Why does Stoke's Law (sedimentation) not work for measuring sand-size fractions?

Last Answer : Your question and details don't exactly jibe: Are you specifically asking about sand or sand-size fractions (which could be nearly anything)? Also, while sand crystals are not typically spherical, ... used up the final dregs of what he eked out Fluid Mechanics & Dynamics class back in school.

Description : The law of conservation of mechanical energy is valid a.Irrespective of the nature of force field b.Only in gravitational field c.Only if the total work done by the particle in moving around in a closed trajectory is zero d.Only if the force is tangential to the trajectory e.None of the above

Last Answer : c. Only if the total work done by the particle in moving around in a closed trajectory is zero

Description : If G is the specific gravity of particles of diameter d, the velocity of settlement V in still water  at T°C, according to Stoke's law, is  (A) V = 418 (G - 1) d² [(3T + 70)/100]  (B) V = 418 (G - 1) d [(3T - ... 1) d² [(2T + 70)/100]  (D) V = 418 (G - 1) d 4  [(3T + 70)/100] 

Last Answer : (A) V = 418 (G - 1) d² [(3T + 70)/100] 

Description : A 600 mm square bearing plate settles by 15 mm in plate load test on a cohesion-less soil under an intensity of loading of 0.2 N/ram². The settlement of a prototype shallow footing 1 m square under the same intensity of ... (A) 15 mm (B) Between 15 mm and 25 mm (C) 25 mm (D) Greater than 25 mm

Last Answer : Answer: Option B

Description : In wind erosion floating of less than 0.1 mm soil particle is observed in — stage a. Saltation b. Surface creep c. Suspension d. None of these

Last Answer : c. Suspension

Description : A bed of spherical particles (specific gravity 2.5) of uniform size 1500 μm is 0.5 m in diameter and 0.5 m high. In packed bed state, the porosity may be taken as 0.4. Ergun's equation for the above fluid-particle ... fluidisation velocity, VOM is (A) 12 mm/s (B) 16 mm/s (C) 24 mm/s (D) 28 mm/s

Last Answer : (B) 16 mm/s

Description : The ratio of the wall drag to the form drag in the Stoke's law range (for motion of spherical particles in a stationary fluid) is (A) 0.5 (B) 1 (C) 2 (D) 0.33

Last Answer : (C) 2

Description : The ratio of wall drag to total drag in the Stoke's law range is (A) 0.5 (B) 1 (C) 1/3 (D) 2/3

Last Answer : (D) 2/3

Description : The kinematic viscosity of an oil (in stokes) whose specific gravity is 0.95 and viscosity 0.011 poise, is (A) 0.0116 stoke (B) 0.116 stoke (C) 0.0611 stoke (D) 0.611 stoke

Last Answer : Answer: Option A

Description : Bond crushing law (A) Calls for relatively less energy for the smaller product particles, than does the Rittinger law (B) Is less realistic in estimating the power requirements of commercial crushers ( ... (D) States that the work required for the crushing is proportional to the new surface created

Last Answer : (A) Calls for relatively less energy for the smaller product particles, than does the Rittinger law

Description : What is 0.0002 x 4?

Last Answer : Need answer

Description : Least audible sound for most of the human ear is – (1) 10.0 μ bar (2) 0.0002 μ bar (3) 0.005 μ bar (4) 5.0 μ bar

Last Answer : (2) 0.0002 μ bar Explanation: Least audible sound for most of the human ear is 2 x 10-5 pascal. The generally accepted standard range of audible frequencies is 20 to 20,000 Hz.

Description : In acoustics, what is the reference pressure in lb/ft2 unit? A. 2x10-5 B. 0.0002 C. 2.089 D. 2.980

Last Answer : C. 2.089

Description : If 20 J of energy is trapped at producer level, then how much energy will be available to peacock as food in the following chain? Plant → Mice → Snake → Peacock (a) 0.02 J (b) 0.002 J (c) 0.2 J (d) 0.0002 J

Last Answer : (a) 0.02 J

Description : Least audible sound for most of the human ear is : (1) 10.0 µ bar (2) 0.0002 µ bar (3) 0.005 µ bar (4) 5.0 µ bar

Last Answer : 0.0002 µ bar

Description : The Gauss law employs which theorem for the calculation of charge density? a) Green theorem b) Stokes theorem c) Gauss theorem d) Maxwell equation

Last Answer : c) Gauss theorem

Description : The Ampere law is based on which theorem? a) Green’s theorem b) Gauss divergence theorem c) Stoke’s theorem d) Maxwell theorem

Last Answer : c) Stoke’s theorem

Description : Gauss law cannot be expressed in which of the following forms? a) Differential b) Integral c) Point d) Stokes theorem

Last Answer : d) Stokes theorem

Description : Divergence theorem is based on a) Gauss law b) Stoke’s law c) Ampere law d) Lenz law

Last Answer : a) Gauss law

Description : Capillary tube method of viscosity measurement is based on the (A) Hagen-Poiseuille’s equation (B) Stoke's law (C) Navier-stokes equation (D) None of these

Last Answer : (A) Hagen-Poiseuille’s equation

Description : The Navier-Stokes equation deals with the law of conservation of (A) Mass (B) Energy (C) Both (A) & (B) (D) Momentum

Last Answer : (D) Momentum

Description : Drag co-efficient for motion of spherical particles in a stationary fluid in the stoke's law range is (A) 24/NRe,P (B) 16/NRe,P (C) 64/NRe,P (D) 48/NRe,P

Last Answer : (A) 24/NRe,P

Description : If aggregates completely pass through a sieve of size 75 mm and are retained on a sieve of size 60 mm, the particular aggregate will be flaky if its minimum dimension is less than (A) 20.5 mm (B) 30.5 mm (C) 40.5 mm (D) 50.5 mm

Last Answer : Answer: Option C

Description : For two plates of equal thickness, full strength of square-edged fillet weld can be ensured if its maximum size is limited to (a) 1.5 mm less than the plate thickness (b) 67% of the plate thickness (c) 80% of the plate thickness (d) Thickness of the plate

Last Answer : (a) 1.5 mm less than the plate thickness

Description : Hazen’s formula VS = 418 (GS – Gw)d [(3T + 70)/100] is used for the settlement velocity of the particles of diameter A. Less than 0.01 mm B. Less than 0.05 mm C. Less than 0.1 mm D. Greater than 0.1 mm

Last Answer : ANS: D

Description : The fluid forces considered in the Navier Stokes equation are (A) Gravity, pressure and viscous (B) Gravity, pressure and turbulent (C) Pressure, viscous and turbulent (D) Gravity, viscous and turbulent

Last Answer : Answer: Option A

Description : As shown in the illustration, which of the listed actions of the synchroscope pointer is occurring? EL-0002 A. Revolving slowly in the slow direction. B. Revolving rapidly in the slow direction. C. ... stationary at the 12 o'clock position since the leading edges of the A phases are in phase.

Last Answer : Answer: C

Description : Which of the following actions must be carried out prior to closing the alternator circuit breaker according to the graph shown in the illustration? EL-0002 A. Increase the alternator voltage. B. Decrease the line voltage. C. Increase the line voltage. D. Decrease the line frequency.

Last Answer : Answer: A

Description : The minimum particle size of fine aggregate is (a) 0.0075mm (b) 0.075mm (c)0.75mm (d)0.95m

Last Answer : (b) 0.075mm

Description : Uniform precipitation having water droplets size less than 0.5 mm is called as a. Rain b. Drizzle c. Snow d. Hail

Last Answer : b. Drizzle

Description : If the shear stress in a R.C.C. beam is (A) Equal or less than 5 kg/cm2 , no shear reinforcement is provided (B) Greater than 4 kg/cm2 , but less than 20 kg/cm2 , shear reinforcement is provided (C) Greater than 20 kg/cm2 , the size of the section is changed (D) All the above

Last Answer : Answer: Option D

Description : Which of the following statements is incorrect? (A) Minimum cross sectional area of longitudinal reinforcement in a column is 0.8% (B) Spacing of longitudinal bars measured along the periphery of ... (D) The number of longitudinal bars provided in a circular column should not be less than four

Last Answer : Answer: Option D

Description : Select the incorrect statement from the following [ A ] Reinforcing bars in a column should not be less than 12 mm in diameter [ B ] The number of longitudinal bars in a circular column should not ... The minimum percentage of longitudinal steel in columns should be 0.8% [ D ] None of the above

Last Answer : [ B ] The number of longitudinal bars in a circular column should not exceed four