Description : In a forced vortex, the velocity of flow everywhere within the fluid is (A) Maximum (B) Minimum (C) Zero (D) Nonzero finite
Last Answer : Answer: Option D
Description : In a free vortex, the (A) Velocity changes linearly with radial distance (B) Flow is necessarily rotational (C) Radial component of velocity is same everywhere (D) Stream lines are not circular
Last Answer : (A) Velocity changes linearly with radial distance
Last Answer : we learned that at school, but I wasn't anywhere to verify it, so I can only believe it ...
Description : The tangential velocity of the water element having a free vortex is (A) Directly proportional to its distance from the centre (B) Inversely proportional to its distance from the centre (C) Directly ... (distance)2 from the centre (D) Inversely proportional to its (distance)2 from the centre
Last Answer : Answer: Option B
Description : Pick up the correct statement from the following: (A) The maritime structures should be designed to withstand wave motion of air (B) The wind vortex results in conical depression in the air surface (C) A tube of air rotating at hundreds of kilometres per hour forms a tornado (D) all of the above
Last Answer : (D) all of the above
Description : In a thick cylindrical shell subjected to an internal pressure (p), the radial stress across the thickness of a cylinder is a) maximum at the outer surface and minimum at the inner surface b) maximum ... and zero at the outer surface d) maximum at the outer surface and zero at the inner surface
Last Answer : c) maximum at the inner surface and zero at the outer surface
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
Description : At the center line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be (A) Minimum (B) Maximum (C) Zero (D) Could be any value
Description : When a liquid is flowing through a pipe, the velocity of the liquid is (A) Maximum at the centre and minimum near the walls (B) Minimum at the centre and maximum near the walls (C) Zero at the centre and maximum near the walls (D) Maximum at the centre and zero near the walls
Last Answer : Answer: Option A
Description : Why can velocity be negative but nonzero speed is always positive?
Last Answer : speed is a scalar quantity with magnitude only but no direction;velocity is a vector with both magnitude (speed) AND direction,which could be positive or negative
Description : The flow of water through the hole in the bottom of a wash basin is an example of (A) Steady flow (B) Uniform flow (C) Free vortex (D) Forced vortex
Last Answer : Answer: Option C
Description : The movement of air mass in the case of Tornado can be described as : (a) Forced vortex throughout (b) free vortex throughout (c) Forced vortex at the core and free vortex outside (d) Free vortex at the core and forced vortex outside
Last Answer : (c) Forced vortex at the core and free vortex outside
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
Description : In a spherical dome the hoop stress due to a concentrated load at crown is (A) Compressive everywhere (B) Tensile everywhere (C) Partly compressive and partly tensile (D) Zero
Description : When a cylindrical vessel containing liquid is revolved about its vertical axis at a constant angular velocity, the pressure (A) Varies as the square of the radial distance B) Increases linearly as ... as the square of the radial distance (D) Decreases as the square of the radial distance
Description : Conversion of dynamic velocity head into static pressure head in a centrifugal pump is the result of : (a) Increasing area of flow between adjacent vanes from inlet to outlet (b) Difference in pressure between suction and delivery ends (c) Radial thrust in pumps (d) Stuffing Box
Last Answer : (b) Difference in pressure between suction and delivery ends
Description : During the motion of a projectile fired from the earth surface, ______. (1) its kinetic energy remains constant (2) its momentum remains constant (3) vertical component of its velocity remains constant (4) horizontal component of its velocity remains constant
Last Answer : (4) horizontal component of its velocity remains constant Explanation: The motion of a projectile is a two-dimensional motion-Horizontal motion and vertical motion-that take place independent ... continuously affects the vertical component, so the vertical motion is a uniformly accelerated motion.
Description : During the motion of a projectile fired from the earth surface, _______ (1) its kinetic energy remains constant (2) its momentum remains constant (3) vertical component of its velocity remains constant (4) horizontal component of its velocity remains constant
Last Answer : horizontal component of its velocity remains constant
Description : Flow occurring in a pipeline when a valve is being opened is (A) Steady (B) Unsteady (C) Laminar (D) Vortex
Description : When a cylindrical vessel, containing some liquid, is rotated about its vertical axis, the liquid surface is depressed down at the axis of its rotation and rises up near the walls of the vessel on all sides. This type of flow is known as (A) Steady flow (B) Turbulent flow (C) Vortex flow
Description : Singing of telephone wires in the wind occurs due to : (a) Vibrations caused by birds as they sit on or get off, the wires (b) Tensioning at the ends (c) Magnus effect (d) Generation of Karman Vortex street
Last Answer : (d) Generation of Karman Vortex street
Description : Which one of the following is not the law of dry friction? a.If friction is neglected, the reactions are always normal to the surfaces on contact b.Friction always acts to oppose the relative motion of ... its maximum value d.The force of friction is always normal to the surface e.All of the above
Last Answer : d. The force of friction is always normal to the surface
Description : Which of the following statements is correct for any closed loop system ? (a) All the co-efficients can have zero value (6) All the co-efficients are always non-zero (c) Only one of the static error co-efficients has a finite non-zero value (d) None of the above
Last Answer : Ans: C
Description : Source of information depending on finite no of outputs is called a. A. markov b. B. finite memory source c. C. zero source d. D. Both A and B
Last Answer : d. D. Both A and B
Description : Resistance of an ideal insulator is a. Infinite b. Zero c. Finite d. depends upon nature
Last Answer : a. Infinite
Description : Resistance of a super conductor is a. Finite b. Infinite c. Zero d. changes with every conductor
Last Answer : c. Zero
Description : Materials, whose resistivity at very low temperatures plunges from a finite value to zero and remains there upon further cooling, are known as
Last Answer : Materials, whose resistivity at very low temperatures plunges from a finite value to zero and remains there upon further cooling, are known as Superconductors
Description : Given a Non-deterministic Finite Automation (NFA) with states p and r as initial and final states respectively transition table as given below The minimum number of states required in Deterministic Finite Automation (DFA) equivalent to NFA is (A) 5 (B) 4 (C) 3 (D) 2
Last Answer : (C) 3
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
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
Description : The pressure intensity is the same in all directions at a point in a fluid (A) Only when the fluid is frictionless (B) Only when the fluid is at rest having zero velocity (C) When there is ... relative to an adjacent layer (D) Regardless of the motion of one fluid layer relative to an adjacent layer
Last Answer : C) When there is no motion of one fluid layer relative to an adjacent layer
Description : Which of the following must be followed by the flow of a fluid (real or ideal)? (I) Newton's law of viscosity. (II) Newton's second law of motion. (III) The continuity equation. (IV) Velocity of boundary layer must be zero relative to ... . (A) I, II, III (B) II, III, V (C) I, II, V (D) II, IV, V
Last Answer : (B) II, III, V
Description : a particle moves with uniform velocity. Which o fthe following statements about the motion of the particle is true. (a) its speed is zero. (b) its acceleration is zero. © its acceleration is opposite to the velocity. (d) its speed may be variable
Last Answer : Its acceleration is zero
Description : For a circular slab carrying a uniformly distributed load, the ratio of the maximum negative to maximum positive radial moment, is (A) 1 (B) 2 (C) 3 (D) 5
Description : is the load on a circular slab of radius , the maximum radial moment at the centre of the slab, is (A) WR²/16 (B) 2WR²/16 (C) 3WR²/16 (D) 5WR²/16
Description : If is the uniformly distributed load on a circular slab of radius fixed at its ends, the maximum positive radial moment at its centre, is (A) 3WR²/16 (B) 2WR²/16 (C) WR²/16 (D) None of these
Description : The maximum radial distance of a Lemniscate curve, having maximum polar angle a, is (A) 3 R (B) 3 R sin2 (C) 3 R (D) 3 R
Description : The point of contraflexure is the point where (A) B.M. changes sign (B) B.M. is maximum (C) B.M. is minimum (D) S.F. is zero
Last Answer : (A) B.M. changes sign
Description : In a shaft rotated by a couple, the shear force varies (A) From zero at the centre to a maximum at the circumference (B) From minimum at the centre of maximum at the circumference (C) From maximum at the centre to zero at the circumference (D) Equally throughout the section
Last Answer : (A) From zero at the centre to a maximum at the circumference
Description : If the stress produced by a prismatic bar is equal to the working stress, the area of the crosssection of the prismatic bar, becomes (A) Zero (B) Infinite (C) Maximum (D) Minimum
Last Answer : (B) Infinite
Description : If the shear force along a section of a beam is zero, the bending moment at the section is (A) Zero (B) Maximum (C) Minimum (D) Average of maximum-minimum
Last Answer : (B) Maximum
Description : In a loaded beam, the point of contraflexure occurs at a section where (A) Bending moment is minimum (B) Bending moment is zero or changes sign (C) Bending moment is maximum (D) Shearing force is maximum
Description : If a suspended body is struck at the centre of percussion, then the pressure on die axis passing through the point of suspension will be (A) Maximum (B) Minimum (C) Zero (D) Infinity
Last Answer : (C) Zero
Description : The discharge in an open channel corresponding to critical depth is (A) Zero (B) Minimum (C) Maximum (D) None of these
Description : A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. Which of the following statement is correct? (A) The pressure on the wall at the liquid level is maximum (B) ... and on the bottom of the wall is maximum (D) The pressure on the bottom of the wall is zero
Description : The direct cost of a project with respect to normal time is (A) minimum (B) Maximum (C) Zero (D) Infinite
Last Answer : (A) minimum
Description : In compression ignition engines, swirl denotes a. Haphazard motion of the gases in the cylinder b. Rotary motion of the gases in the cylinder. c. Radial motion of the gases in the cylinder. d. None of the above
Last Answer : ANSWER a. Haphazard motion of the gases in the chamber
Description : Hallow cone nozzle – liquid is fed into whirl chamber through entry or through a fixed spiral passage to give rotation motion. a. Axial b. Radial c. tangential. d. None of above
Last Answer : Ans- c. tangential.
Description : From which of the following is basic robotic motion. (A) Vertical traverse (B) Radial traverse (C) Rotational traverse (D) All of the above
Last Answer : D
Description : Python: how to find nonzero indices in each row of a compressed sparse matrix -Web-Development
Last Answer : answer: