Description : Pick out the wrong statement. (A) The form drag is dependent upon the occurrence of a wake (B) The shear stress at any given cross-section of a pipe for steady flow (either laminar or turbulent ... of viscosity (D) Existence of the boundary layer in fluid flow is because of viscosity of the fluid
Last Answer : (C) An ideal fluid is the one, which has negligible surface tension and obeys the Newton's law of viscosity
Description : Drag co-efficient for flow past immersed body is the ratio of __________ to the product of velocity head and density. (A) Shear stress (B) Shear force (C) Average drag per unit projected area (D) None of these
Last Answer : (C) Average drag per unit projected area
Description : A flow in which __________ force is dominating over the viscosity is called turbulent flow. (A) Elastic (B) Surface tension (C) Viscous (D) Inertia
Last Answer : Answer: Option D
Description : The maximum magnitude of shear stress due to shear force F on a rectangular section of area A at the neutral axis, is (A) F/A (B) F/2A (C) 3F/2A (D) 2F/3A
Last Answer : (C) 3F/2A
Description : A fluid whose apparent viscosity increases with shear rate is termed as the __________ fluid. (A) Newtonian (B) Viscous (C) Dilatant (D) Non-viscous
Last Answer : (C) Dilatan
Description : Pick up the incorrect statement from the following. The intensity of horizontal shear stress at the elemental part of a beam section, is directly proportional to (A) Shear force (B) Area of the section ... . of the area from its neutral axis (D) Moment of the beam section about its neutral 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 : In case of laminar flow of fluid through a circular pipe, the (A) Shear stress over the cross-section is proportional to the distance from the surface of the pipe (B) Surface of velocity distribution is a ... occurs at a radial distance of 0.5 r from the centre of the pipe (r = pipe radius)
Last Answer : (B) Surface of velocity distribution is a paraboloid of revolution, whose volume equals half the volume of circumscribing cylinder
Description : The graphical representation of variation of axial load on y axis and position of cross section along x axis is called as _____ (a) Bending moment diagram (b) Shear force diagram (c) Stress-strain diagram (d) Trust diagram
Last Answer : (d) Trust diagram
Description : Bulk modulus of a fluid is the ratio of (A) Shear stress to shear strain (B) Increase in volume to the viscosity of fluid (C) Increase in pressure to the volumetric strain (D) Critical velocity to the viscosity of fluid
Last Answer : Answer: Option C
Description : The ratio of maximum bending stress to maximum shear stress on the cross section when a shaft is simultaneously subjected to a torque T and bending moment M, a. T/M b. M/T c. 2T/M d. 2M/T
Last Answer : d. 2M/T
Description : The ratio of maximum shear stress to average shear stress is 4/3 in _______ a. circular cross-section b. rectangular cross-section c. square cross-section d. all of the above
Last Answer : a. circular cross-section
Description : According to Newton's law of viscosity, the shear stress on a layer of a fluid is __________ to the rate of shear strain. (A) Equal to (B) Directly proportional (C) Inversely proportional (D) None of these
Last Answer : Answer: Option B
Description : The shear force on a simply supported beam is proportional to (A) Displacement of the neutral axis (B) Sum of the forces (C) Sum of the transverse forces (D) Algebraic sum of the transverse forces of the section
Last Answer : (D) Algebraic sum of the transverse forces of the section
Description : is the pre-stressed force applied to the tendon of a rectangular pre-stressed beam whose area of cross section is and sectional modulus is . The maximum stress in the beam, subjected to a maximum bending moment , is (A) f = (P/A) + (Z/M) ... ) + (M/Z) (C) f = (P/A) + (M/Z) (D) f = (P/A) + (M/6Z)
Description : is the pre-stressed force applied to tendon of a rectangular pre-stressed beam whose area of cross section is and sectional modulus is . The minimum stress on the beam subjected to a maximum bending moment is (A) f = (P/A) - (Z/M) (B) f = (A/P) - (M/Z) (C) f = (P/A) - (M/Z) (D) f = (P/A) - (M/6Z)
Description : Pick out the wrong statement. (A) Momentum transfer in laminar flow results from velocity gradient (B) A fluid in equilibrium is not free from shear stress (C) The viscosity of a non-Newtonian fluid is a function of temperature only (D) Both (B) and (C)
Last Answer : (D) Both (B) and (C)
Description : Euler's number is the ratio of __________ force to pressure force. (A) Inertia (B) Gravity (C) Viscous (D) None of these
Last Answer : Answer: Option A
Description : The ratio of the inertia force to the __________ is called Euler's number. (A) Pressure force (B) Elastic force (C) Surface tension force (D) Viscous force
Description : Poise is the unit of (A) Surface tension (B) Capillarity (C) Viscosity (D) Shear stress in fluids
Description : Newton's law of viscosity is a relationship between (A) Shear stress and the rate of angular distortion (B) Shear stress and viscosity (C) Shear stress, velocity and viscosity (D) Pressure, velocity and viscosity
Description : Newton's law of viscosity is a relationship between (A) Pressure, velocity and temperature (B) Shear stress and rate of shear strain (C) Shear stress and velocity (D) Rate of shear strain and temperature
Description : Newton's law of viscosity, which states that the shear stress is proportional to the __________ Co-efficient of viscosity is called dynamic or absolute viscosity(where, V = velocity, Vg = velocity gradient). (A) V2 (B) 1/V2 (C) 1/Vg (D) Vg
Last Answer : Option D
Description : Shear stress in a fluid flowing in a round pipe (A) Varies parabolically across the cross-section (B) Remains constant over the cross-section (C) Is zero at the centre and varies linearly with the radius (D) Is zero at the wall and increases linearly to the centre
Last Answer : (C) Is zero at the centre and varies linearly with the radius
Description : A hollow prismatic beam of circular section is subjected to a torsional moment. The maximum shear stress occurs at (a) inner wall of cross section (b) middle of thickness (c) outer surface of shaft (d) none of these
Last Answer : (c) outer surface of shaft
Description : When a shaft is subjected to a twisting moment, every cross-section of the shaft will be under (a) Tensile stress (b) Compressive stress (c) Shear stress (d) All of these
Last Answer : c) Shear stress
Description : A beam of uniform strength has a. same cross-section throughout the beam b. same bending stress at every section c. same bending moment at every section d. same shear stress at every section
Last Answer : b. same bending stress at every section
Description : Shear stress in the beam acting on the cross section is (a) Normal to the cross section (b) Tangential to the cross section (c) Neither normal nor tangential (d) None
Last Answer : b) Tangential to the cross section
Description : The Euler's equation for the motion of liquids is based upon the assumption that (A) The fluid is non - viscous, homogeneous and incompressible (B) The velocity of flow is uniform over the section (C) The flow is continuous, steady and along the stream line (D) All of the above
Description : A pre-stressed concrete member is preferred because (A) Its dimensions are not decided from the diagonal tensile stress (B) Large size of long beams carrying large shear force need not be adopted (C) Removal of cracks in the members due to shrinkage (D) All the above
Description : Pick out the wrong statement. (A) A fluid mass is free from shearing forces, when it is made to rotate with a uniform velocit (B) Newton's law of viscosity is not applicable to the ... types of bearings (D) Rise of water in capillary tubes reduces with the increasing diameter of capillary tubes
Last Answer : (B) Newton's law of viscosity is not applicable to the turbulent flow of fluid with linear velocity distribution
Description : Which of the following is not applicable to liquid fuels? a) the viscosity of a liquid fuel is a measure of its internal resistance to flow. b) the viscosity of all liquid fuels decreases with ... the viscosity of liquid fuels, higher will be its heating value d) viscous fuels need heat tracing
Last Answer : c) higher the viscosity of liquid fuels, higher will be its heating value
Description : 16. Surface tension force is the product of surface tension per unit length and cross-sectional area of flow. A) Correct B) Incorrect
Last Answer : B
Description : What is the shear stress acting along the neutral axis of triangular beam section, with base 60 mm and height 150 mm, when shear force of 30 kN acts? a. 15.36 N/mm2 b. 10.6 N/mm2 c. 8.88 N/mm2 d. Insufficient data
Last Answer : c. 8.88 N/mm2
Description : The Bernoulli's equation is based on the assumption that (A) There is no loss of energy of the liquid flowing (B) The velocity of flow is uniform across any cross-section of the pipe (C) No force except gravity acts on the fluid (D) All of the above
Description : Pick up the correct statement regarding the centre line method of estimating a building (A) Product of the centre line of the walls and area of cross-section of any item, gives total quantity of the ... length is reduced by half the layer of main wall joining the partition wall (D) All the above
Last Answer : (D) All the above
Description : A lift of weight W is lifted by a rope with an acceleration f. If the area of cross-section of the rope is A, the stress in the rope is (A) [W (1 + f/G)]/A (B) (1 - g/f)/A (C) [W (2 + f/G)]/A (D) [W (2 + g/f)]/A
Last Answer : (A) [W (1 + f/G)]/A
Description : If a concrete column 200 200 mm in cross-section is reinforced with four steel bars of 1200 mm2 total cross-sectional area. Calculate the safe load for the column if permissible stress in concrete is 5 N/mm2 ... 15 Ec (A) 264 MN (B) 274 MN (C) 284 MN (D) 294 MN
Last Answer : (C) 284 MN
Description : Strain energy of a member may be equated to (A) Average resistance × displacement (B) ½ stress × strain × area of its cross-section (C) ½ stress × strain × volume of the member (D) ½ (stress)2 × volume of the member + Young's modulus E
Last Answer : (D) ½ (stress)2 × volume of the member + Young's modulus E
Description : If At is the area of steel cross-section, t is working stress, L is width of road and W is weight of slab per square metre, the spacing of the tie bars for a longitudinal joint, is (A) (100 At × t)/WL (B) 100 At/tWL (C) (100 WAt × t)/tL (D) 100 WL/At t
Description : For similarity, in addition to models being geometrically similar to prototype, the following in both cases should also be equal (A) Ratio of inertial force to force due to viscosity (B) ... the four ratios of inertial force to force due to viscosity, gravitation, surface tension, and elasticity
Description : The terminal velocity of a sphere setting in a viscous fluid varies as : (a) The Reynolds number (b) The square of its diameter (c) Directly proportional to the viscosity of the fluid (d) Its diameter
Last Answer : (b) The square of its diameter
Description : Pick up the correct statement from the following: (A) The bending stress in a section is zero at its neutral axis and maximum at the outer fibres (B) The shear stress is zero at the outer ... (C) The bending stress at the outer fibres, is known as principal stress (D) All the above
Description : The shear stress at any section of a shaft is maximum (A) At the centre of the section (B) At a distance r/2 from the centre (C) At the top of the surface (D) At a distance 3/4 r from the centre
Last Answer : (C) At the top of the surface
Description : A beam is said to be of uniform strength, if (A) B.M. is same throughout the beam (B) Shear stress is same throughout the beam (C) Deflection is same throughout the beam (D) Bending stress is same at every section along its longitudinal axis
Last Answer : (D) Bending stress is same at every section along its longitudinal axis
Description : A triangular section having base b, height h, is placed with its base horizontal. If the shear stress at a depth y from top is q, the maximum shear stress is (A) 3S/bh (B) 4S/bh (C) 4b/Sh (D) 3b/bS
Last Answer : (A) 3S/bh
Description : An R.C.C. beam of 25 cm width and 50 cm effective depth has a clear span of 6 metres and carries a U.D.L. of 3000 kg/m inclusive of its self weight. If the lever arm constant for the section is 0.865, the maximum intensity ... , is (A) 8.3 kg/cm2 (B) 7.6 kg/cm2 (C) 21.5 kg/cm2 (D) 11.4 kg/cm2
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
Description : In the zone of R.C.C. beam where shear stress is less than 5 kg/cm2 , nominal reinforcement is provided at a pitch of (A) One-half lever arm of the section (B) One-third lever arm of the section (C) Lever arm of the section (D) One and half lever arm of the section
Description : An R.C.C. beam of 6 m span is 30 cm wide and has a lever arm of 55 cm. If it carries a U.D.L. of 12 t per m and allowable shear stress is 5 kg/cm2 , the beam (A) Is safe in shear (B) Is safe with stirrups (C) Is safe with stirrups and inclined bars (D) Needs revision of section