Description : Coefficient of contraction is the ratio of (A) Actual velocity of jet at vena contracta to the theoretical velocity (B) Loss of head in the orifice to the head of water available at the exit of the ... available at the exit of the orifice (D) Area of jet at vena-contracta to the area of orifice
Last Answer : Answer: Option D
Description : Coefficient of resistance is the ratio of (A) Actual velocity of jet at vena-contracta to the theoretical velocity (B) Area of jet at vena-contracta to the area of orifice (C) Loss ... available at the exit of the orifice (D) Actual discharge through an orifice to the theoretical discharge
Last Answer : Answer: Option C
Description : Coefficient of velocity is defined as the ratio of (A) Actual velocity of jet at vena contracta to the theoretical velocity (B) Area of jet at vena contracta to the area of orifice (C) Actual discharge through an orifice to the theoretical discharge (D) None of the above
Last Answer : Answer: Option A
Description : Cd , Cc and Cv are related (for flow through an orifice) as (where, Cd = discharge co-efficient, Cc = co-efficient of contraction = (area of jet at venacontracta/area of opening), Cv = co-efficient of velocity = (actual velocity ... A) Cd = Cc /Cv (B) Cd = Cc .Cv (C) Cd = Cv / Cc (D) None of these
Last Answer : (B) Cd = Cc .Cv
Description : The actual velocity at vena-contracta for flow through an orifice from a reservoir is given by (A) Cv . √(2gH) (B) Cc . √(2gH) (C) Cd . √(2gH) (D) Cv . Va
Last Answer : (A) Cv . √(2gH)
Description : A jet of water discharging from a 40 mm diameter orifice has a diameter of 32 mm at its vena contracta. The coefficient of contraction is (A) 0.46 (B) 0.64 (C) 0.78 (D) 0.87
Last Answer : Answer: Option B
Description : The fluid jet discharging from a 2" diameter orifice has a diameter of 1.75" at its vena-contracta. The co-efficient of contraction is (A) 1.3 (B) 0.766 (C) 0.87 (D) None of these
Last Answer : (B) 0.766
Description : What is the co-efficient of contraction, if a fluid jet discharging from a 50 mm diameter orifice has a 40 mm diameter at its vena-contracta? (A) 0.64 (B) 1.65 (C) 0.32 (D) 0.94
Last Answer : (A) 0.64
Description : 10. In an external or internal mouthpiece, the absolute pressure head at vena contracta is zero when atmospheric pressure head is 10.3 m of water. A) Correct B) Incorrect
Last Answer : A
Description : 01. In a convergent mouthpiece, the absolute pressure head at vena contracta is the same as that of the atmosphere. A) True B) False
Description : In an external mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to 0.89 times the height of the liquid, above the vena contracta. (A) Less than (B) More than (C) Equal to (D) None of these
Description : In an internal mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to height of the liquid above the vena contracta. (A) Less than (B) More than (C) Equal to (D) None of these
Description : Vena-contracta formed during flow of a liquid through an orificemeter has (A) Minimum liquid cross-section (B) More diameter compared to orifice diameter (C) Minimum velocity of fluid stream (D) None of these
Last Answer : (A) Minimum liquid cross-section
Description : In a short cylindrical external mouthpiece, the vena contracta occurs at a distance __________ the diameter of the orifice from the outlet of orifice. (A) Equal to (B) One-fourth (C) One-third (D) One-half
Description : Vena-contracta pressure tapping is at a distance __________ from the position of an orificemeter fitted in a pipe of internal diameter 'd' (A) d (B) 0.5 d (C) 2d (D) 4d
Last Answer : (B) 0.5 d
Description : Location of vena-contracta in an orificemeter does not depend upon the (A) Type of orifice (B) Density, viscosity & compressibility of the fluid (C) Ratio of pipe diameter to orifice diameter (D) Pipe roughness
Last Answer : (A) Type of orifice
Description : The velocity of jet of water travelling out of opening in a tank filled with water is proportional to (A) Head of water (h) (B) h² (C) V/T (D) h/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]
Description : The loss of head at entrance in a pipe is (where v = Velocity of liquid in the pipe) (A) v²/2g (B) 0.5v²/2g (C) 0.375v²/2g (D) 0.75v²/2g
Description : The loss of head at exit of a pipe is (where v = Velocity of liquid in the pipe) (A) v²/2g (B) 0.5v²/2g (C) 0.375v²/2g (D) 0.75v²/2g
Description : Air output of a duster is given by formula a) Q= 60×A×V b)Q= 60×A×(2GH/Y) c) Q= 240×A×h d) all of the above
Last Answer : d) all of the above
Description : Torricelli's theorem states that the velocity ‘v’ of the liquid emerging from the bottom of the wide tank is given by √(2gh). In practice, this velocity is: A. equal to √(2gh) B. greater than √(2gh) C. lesser than √(2gh) D. independent of height and gravitational field strength
Last Answer : lesser than √(2gh
Description : A point, in a compressible flow where the velocity of fluid is zero, is called (A) Critical point (B) Vena contracta C) Stagnation point (D) None of these
Description : Velocity of escape is equal to A. r √(2g); where r: radius of Earth or any other planet for that matter, g: gravitational field strength B. g √(2r); where r: radius of ... (2gr); where r: radius of Earth or any other planet for that matter, g: gravitational field strength
Last Answer : √(2gr); where r: radius of Earth or any other planet for that matter, g: gravitational field strength
Description : The discharge over a right angled notch is (where H = Height of liquid above the apex of notch) (A) (8/15) Cd. 2g. H (B) (8/15) Cd. 2g. H3/2 (C) (8/15) Cd. 2g. H² (D) (8/15) Cd. 2g. H5/2
Description : Theoretical head developed by a centrifugal pump does not depend upon the __________ the impeller. (A) Radius of (B) Speed of (C) Fluid velocity leaving (D) None of these
Last Answer : (D) None of these
Description : In case of a centrifugal pump, the theoretical head developed is dependent on the __________ the impeller. (A) Speed of (B) Diameter of (C) Fluid velocity leaving (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : A fire hose has a nozzle attached to it, and the nozzle discharges a jet of water into the atmosphere at a velocity of 20 m/s. this causes the joint of the nozzle with the hose to be in : (a) Tension (b) A state of zero stress (c) Compression (d) Bending stress
Last Answer : (a) Tension
Description : Consider the following assumption made in the analysis of a jet impinging normally on a moving plate to introduce the principle of moment of momentum: 1. Friction between jet and plate is neglected. 2. Flow is steady 3. Impinging momentum of ... b) 1, 2 & 3 only (c) 2, 3 and 4 only (d) 1, 2, 3 & 4
Last Answer : (a) 1, 2 & 4 only
Description : For which word, the letter ‘G’ has been used in ‘2G Spectrum’? -Do You Know?
Last Answer : answer:
Description : Which of the following complex ions has electrons that are symmetrically filled in both `t_(2g) and e_(g)` orbitals ?
Last Answer : Which of the following complex ions has electrons that are symmetrically filled in both `t_(2g) and e_(g)` orbitals ? A ... D. `[Co(NH_(3))_(6)]^(2+)`
Description : All the metal ions contain `t_(2g)^(6)e_(g)^(0)` configuaration. Which of the following complex will be paramagnetic ?
Last Answer : All the metal ions contain `t_(2g)^(6)e_(g)^(0)` configuaration. Which of the following complex will be paramagnetic ? ... `[Fe(CN)_(5)(O_(2))]^(-5)`
Description : Indian post gold coin denomination is a) 0.2 g, 2g, 5 g and 8 g of 24 carat (99.99% pure) a) 1 g, 2g, 6 g and 10 g of 24 carat (99.99% pure) a) 0.5 g, 1g, 5 g and 8 g of 24 carat (99.99% pure) a) None of these
Last Answer : a) 0.5 g, 1g, 5 g and 8 g of 24 carat (99.99% pure)
Description : Which of the following relationships is correct for relating the three elastic constants of an isotropic elastic material (where, E = Young's modulus, G = Modulus of rigidity or shear modulus v = Poisson's ratio)? (A) E = 2G (1 + v) (B) E = G (1 + v) (C) E = G (1 + v)/2 (D) E = 2G (1 + 2v)
Last Answer : (A) E = 2G (1 + v)
Description : The letter ‘G’ used in ‘2G Spectrum’ stands for (1) Governance (2) Global (3) Generation(4) Google
Last Answer : Generation
Description : Theoretical capacity of crushing rolls in tons/hr is given by (where, V = peripheral velocity, m/sec. W = width of rolls, m Dr = distance between rolls ρ = density of material to be crushed, kg/m3 here, V =πND where, N = speed of the rolls ... V.W.Dr.ρ (B) 3.6 V.W. ρ (C) 3.6 W.Dr.ρ (D) 3.6 V.W.Dr/ρ
Last Answer : (A) 3.6 V.W.Dr.ρ
Description : Co-efficient of discharge (Cd ) is defined as actual discharge/theoretical discharge and is equal to Cc . Cv ; where Cc = Co-efficient of contraction and Cv = co-efficient of velocity. Cd of an orifice is usually about (A) 0.42 (B) 0.62 (C) 0.82 (D) 0.98
Last Answer : (B) 0.62
Description : The discharge through a large rectangular orifice is given by (where H1 = Height of the liquid above the top of the orifice, H2 = Height of the liquid above the bottom of the orifice, b = Breadth of the orifice, and Cd = Coefficient of ... H1 3/2) (D) Q = (2/3) Cd b (2g) (H2 2 - H1 2 )
Description : A tank of uniform cross-sectional area (A) containing liquid upto height (H1) has an orifice of crosssectional area (a) at its bottom. The time required to bring the liquid level from H1 to H2 will be (A) 2A d a 2g) (B) 2A d ... 2g) (C) 2A - d a 2g) (D) 2A 3/2 - 3/2)/Cd a 2g)
Description : According to Bernoulli's equation (A) Z + p/w + v²/2g = constant (B) Z + p/w - v²/2g = constant (C) Z - p/w + v²/2g = constant (D) Z - p/w - v²/2g = constant
Description : A person of mass ‘m’ kg jumps from a height of ‘h’ meters, he will land on the ground with a velocity equal to: A. √(2 × g × h) B. 1/h × √(2 × g) C. 2gh D. 2√(g × h)
Last Answer : √(2 × g × h)
Description : A jet of water of cross-sectional area 20 sq. cm impinges on a plate at an angle of 60? with a velocity of 10 m/sec. Neglecting the friction between the jet and plate (density of water 1000/9.81 kgm-1 sec2 per cubic meter), the ... a.15 - 20 kg b.20 - 25 kg c.5 - 10 kg d.25 - 30 kg e.10 - 15 kg
Last Answer : a. 15 - 20 kg
Description : Detention period of a settling tank is (A) Average theoretical time required for water to flow through the tank (B) Time required for flow of water to fill the tank fully (C) Average time for which water is retained in tank (D) All the above
Last Answer : (D) All the above
Description : For slaking of 10 kg of CaO, the theoretical amount of water is (A) 2.2 kg (B) 1.5 kg (C) 3.2 kg (D) None of these
Description : Which of the following varies as the square root of oil pressure during atomisation of fuel oil through a pressure jet burner? (A) Output & fineness (B) Velocity (C) Both (A) & (B) (D) None of these
Last Answer : Option C
Description : It is the unbalanced force developed in a turbo jet engine that is caused by the difference in the momentum of the low-velocity air entering the engine and the high velocity exhaust gases leaving the engine. a. Fall b. Lift c. Drag d. Thrust
Last Answer : Thrust
Description : 20. The coefficient of discharge is the ratio of theoretical discharge to the actual discharge through an orifice. A) True B) False
Last Answer : B
Description : The theoretical stress-strain curve of the concrete in the Limit State design of structures is correspondingly reduced by the factor [ A ] 0.35 [ B ] 0.5 [ C ] 0.67 [ D ] 0.75
Last Answer : [ C ] 0.67