Description : When an internal mouthpiece is running free, the discharge through the mouthpiece is (where a = Area of mouthpiece, and H = Height of liquid above the mouthpiece) (A) 0.5 a. gH (B) 0.707 a. gH (C) 0.855 a. gH (D) a. gH
Last Answer : Answer: Option A
Description : The discharge through an external mouthpiece is given by (where a = Cross-sectional area of the mouthpiece, and H = Height of liquid above the mouthpiece) (A) 0.855 a. gH) (B) 1.855 aH. g) (C) 1.585 a. gH) (D) 5.85 aH. g)
Description : The coefficient of discharge in case of internal mouthpiece is __________ that of external mouthpiece. (A) Less than (B) More than (C) Equal to (D) None of these
Description : The coefficient of discharge for an external mouthpiece depends upon (A) Velocity of liquid (B) Pressure of liquid (C) Area of mouthpiece (D) Length of mouthpiece
Last Answer : Answer: Option D
Description : Consider the following devices : 1. Orifice 2. Borda’s mouthpiece running free 3. Bell mouthed orifice 4. External mouthpiece What is the correct sequence of these devices by decreasing magnitude of coefficient of discharge? a) 2, 3, 1 and 4 b) 4, 3, 1 and 2 c) 4, 1, 3 and 2 d) 2, 1, 3 and 4
Last Answer : b) 4, 3, 1 and 2
Description : 15. When an internal mouthpiece is running full, the discharge through the mouthpiece is twice the discharge when it is running free. A) Correct B) Incorrect
Last Answer : B
Description : The discharge through a convergent mouthpiece is __________ the discharge through an internal mouthpiece of the same diameter and head of water. (A) Equal to (B) One-half (C) Three fourth (D) Double
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 : For perfectly elastic bodies the value of the coefficient of restitution is a.0.707 b.0.5 c.1 d.0.25 e.Zero
Last Answer : a. 0.707
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 : Re-entrant or Borda's mouthpiece is an __________ mouthpiece. (A) Internal (B) External (C) Both A and B (D) None of these
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
Last Answer : Answer: Option B
Description : If the coefficient of discharge is 0.6, then the discharge over a right angled notch is (A) 0.417 H 5/2 (B) 1.417 H 5/2 (C) 4.171 H 5/2 (D) 7.141 H 5/2
Description : When the coefficient of discharge (Cd) is 0.623, then the general equation for discharge over a rectangular weir is (A) 1.84(L - 0.1nH)H 3/2 (B) 1.84(L - nH)H 2 (C) 1.84(L - 0.1nH)H 5/2 (D) 1.84(L - nH)H 3
Description : For a strongest rectangular beam cut from a circular log, the ratio of the width and depth, is (A) 0.303 (B) 0.404 (C) 0.505 (D) 0.707
Last Answer : (D) 0.707
Description : During erection, the pile of length is supported by a crane at a distance of (A) 0.207 l (B) 0.293 l (C) 0.707 l (D) 0.793 l
Last Answer : (C) 0.707 l
Description : S1 and S2 are the draw downs in an observation well at times t1 and t2 after pumping. For discharge Q and coefficient of transmissibility T, the relationship, is (A) S2 - S1 = (2.3Q/ ) log10 (t2/t1) (B) S2 - S1 ... - S1 = (2.3Q/4 ) loge (t2/t1) (D) S2 - S1 = (2.3Q/4 ) loge (t1/t2
Last Answer : (B) S2 - S1 = (2.3Q/4 ) log10 (t2/t1)
Description : Coefficient of discharge of an ogee spillway (A) Depends on depth of approach and upstream slope (B) Depends on downstream apron interference and downstream submergence (C) Remains constant (D) Both (A) and (B
Description : 20. The coefficient of discharge is the ratio of theoretical discharge to the actual discharge through an orifice. A) True B) False
Description : 10. If the value of coefficient of discharge increases, the discharge through the orifice decreases. A) True B) False
Description : 09. According to Bazin, the coefficient of discharge varies with the height of water over the sill of a weir. A) Correct B) Incorrect
Description : The value of coefficient of discharge is __________ the value of coefficient of velocity. (A) Less than (B) Same as (C) More than (D) None of these
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 : 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 : Coefficient of discharge Cd is equal to (where Cc = Coefficient of contraction, Cv = Coefficient of velocity, and Cr = Coefficient of resistance) (A) Cc × Cv (B) Cc × Cr (C) Cv × Cr (D) Cc /Cr
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
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 : 05. In an internal mouthpiece, if the jet after contraction expands and fills up the whole mouthpiece, then the mouthpiece is said to be running free. A) True B) False
Description : A pipe of length more than double the diameter of orifice fitted externally or internally to the orifice is called a (A) Notch (B) Weir (C) Mouthpiece (D) Nozzle
Description : An internal mouthpiece is said to be running __________ if the length of the mouthpiece is more than three times the diameter of the orifice. (A) Free (B) Partially (C) Full (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 : In an internal mouthpiece, if the jet after contraction does not touch the sides of the mouthpiece, then the mouthpiece is said to be (A) Running full (B) Running free (C) Partially running full (D) Partially running free
Description : An internal mouthpiece is said to be running free if the length of the mouthpiece is __________ the diameter of the orifice. (A) Less than twice (B) More than twice (C) Less than three times (D) More than three times
Description : The slope correction for a length of 30 m along a gradient of 1 in 20, is (A) 3.75 cm (B) 0.375 cm (C) 37.5 cm (D) 2.75 cm
Last Answer : (A) 3.75 cm
Description : In measuring critical speed of shaft experiment, it was found that the frequency ratio is 0.707 when the eccentricity is 0.05 m. what will be the displacement of the system. A. 0.05 m B. 0.005 m C. 0.5 m D. Infinite
Last Answer : A. 0.05 m
Description : Find the ratio of refractive index of medium 2 to that of medium 1, when the Brewster angle is 60 degree. a) 0.707 b) 1.5 c) 0.866 d) 1.732
Last Answer : d) 1.732
Description : Convert the point (3,4,5) from Cartesian to spherical coordinates a) (7.07,450,530) b) (0.707,450,530) c) (7.07,540,630) d) (0.707,540,630)
Last Answer : a) (7.07,450,530)
Description : If dry density, water density and specific gravity of solids of a given soil sample are 1.6 g/cc, 1.84 g/cc and 2.56 respectively, the porosity of the soil sample, is (A) 0.375 (B) 0.370 (C) 0.380 (D) 0.390
Last Answer : (A) 0.375
Description : How do you put 0.077 0.777 0.707 0.77 0.7?
Last Answer : What is the answer ?
Description : What is the word form for 0.707?
Last Answer : Need answer
Description : How does the gain of a parabolic dish type antenna change when the operating frequency is doubled? A. Gain does not change B. Gain is multiplied by 0.707 C. Gain increases 6 dB D. Gain increases 3 dB
Last Answer : C. Gain increases 6 dB
Description : Area under tension in a single transverse fillet lap weld is (i)0.707 tl (ii) 0.807 tl (iii) 400 tl (iv)None
Last Answer : (i)0.707 tl
Description : If length of weld is l and leg h, then area of throat can be given by a) 0.707 hl b) 1.414hl c) hl d) None of the listed
Last Answer : a) 0.707 hl
Description : Find the acceptance angle of a material which has a numerical aperture of 0.707 in air. a) 30 b) 60 c) 45 d) 90
Last Answer : c) 45
Description : The two watt meters measurement the ratio of two meter readings is –(1-sqrt3):( 1+sqrt3) then the power factor is a) 1 b) 0.866 c) 0.707 d) 0
Last Answer : Ans: 0.707
Description : The ratio of spacing (d) for for simple cubic lattice, d(100) :d(110) :d(111) a. 1 : 0.707: 0.669 b. 1: 1.414: 0.577 c. 1: 0.707 : 0.577 d. 1: 0.707 : 1.154
Last Answer : c. 1: 0.707 : 0.577
Description : The contraction co-efficient for Borda's mouthpiece (for frictionless fluid) is (A) 0.1 (B) 0.5 (C) 0.94 (D) 1
Last Answer : (B) 0.5
Description : Co-efficient of velocity is __________ the coefficient of discharge. (A) Less than (B) More than (C) Equal to (D) Not related to
Last Answer : (B) More than
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