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 : 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 : 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 : 10. If the value of coefficient of discharge increases, the discharge through the orifice decreases. A) True B) False
Last Answer : B
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 : 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 : The relative coefficient of performance is (a) actual COP/theoretical COP (b) theoretical COP/actual COP (c) actual COP x theoretical COP (d) 1-actual COP x theoretical COP
Last Answer : Ans: a
Description : The discharge co-efficient for an orifice meter does not depend upon the (A) Pipe length (B) Ratio of pipe diameter to orifice diameter (C) Type of orifice & the Reynolds number (D) Pipe diameter
Last Answer : (A) Pipe length
Description : The co-efficient of discharge of an orificemeter is a function of (A) Reynolds number at the orifice (B) Ratio of orifice dia to pipe dia (C) Both (A) and (B) (D) None of the above parameters, and has a constant value of 0.61
Last Answer : (C) Both (A) and (B)
Description : The coefficient of viscosity may be determined by (A) Capillary tube method (B) Orifice type viscometer (C) Rotating cylinder method (D) All of these
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 value of coefficient of velocity for a sharp edged orifice __________ with the head of water. (A) Decreases (B) Increases (C) Remain same (D) None of these
Description : Derive equation for discharge through orifice meter with the help of neat sketch.
Last Answer : Orifice Meter or orifice Plate: It is a device used for measuring the rate of flow of a fluid through a pipe. It is Cheaper device as compared to venturimeter. It also works on the same ... a distance of about half the diameter of the orifice on the downstream side from the orifice plate.
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 : Actual lift of a pump is always less than the theoretical lift and is limited by the (A) Specific gravity & temperature of the liquid (B) Leakage & pressure decreasing at higher elevations (C) Frictional resistance through pipes, fittings & passages (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : What is the value of co-efficient of discharge for square edged circular orifice (for β = 0.3 to 0.5)? (A) 0.61 - 0.63 (B) 0.5 - 0.75 (C) 0.75 - 0.90 (D) 0.35 - 0.55
Last Answer : (A) 0.61 - 0.63
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 : 09. According to Bazin, the coefficient of discharge varies with the height of water over the sill of a weir. A) Correct B) Incorrect
Last Answer : A
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 : 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 is (A) 0.375 (B) 0.5 (C) 0.707 (D) 0.855
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 : 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
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 : 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 : The ratio of the actual damping coefficient (c) to the critical damping coefficient (cc ) is known as _________ A Damping factor B Damping coefficient C Resistive factor D Resistive coefficient
Last Answer : A Damping factor
Description : The ratio of actual damping coefficient to the critical damping coefficient is known as A Magnification Factor B Damping Factor C Logarithmic decrementD None of the mentioned
Last Answer : B Damping Factor
Description : Ratio of actual damping coefficient to critical damping coefficient is called A. Damping Factor B. Angular Factor C. Critical Factor D. None of above
Last Answer : A. Damping Factor
Description : The ratio of the actual damping coefficient (c) to the critical damping coefficient (cc ) is known as _________ ( A ) Damping factor ( B ) Damping coefficient ( C ) Resistive factor ( D ) Resistive coefficient
Last Answer : ( A ) Damping factor
Description : The ratio of the actual damping coefficient (c) to the critical damping coefficient (cc ) is known as _________ a) Damping factor b) Damping coefficient c) Resistive factor d) Resistive coefficient
Last Answer : a) Damping factor
Description : Pick out the wrong statement. (A) Theoretical flame temperature is the temperature attained by the products of combustion, when the fuel is burned without loss or gain of heat (B) ... flame temperature (D) Adiabatic flame temperatures of actual combustions are always less than the maximum values
Last Answer : (C) Burning the fuel with excess pure oxygen results in maximum theoretical flame temperature
Description : Stress Concentration Factor is the ratio of nominal stress obtained by elementary equations for minimum cross- section and highest value of actual stress near discontinuity. a) True b) False
Last Answer : b) False
Description : 14. The velocity of liquid flowing through an orifice varies with the available head of the liquid. A) Agree B) Disagree
Description : In a city the ratio of the drainage to sewage is 20, the percentage discharge passing through non-monsoon periods, is A. 5 B. 10 C. 15 D. 20
Last Answer : ANS: D
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 : 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
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 : With increase in the ratio of orifice diameter to pipe diameter, the fraction of the orifice pressure differential that is permanently lost (A) Increases (B) Decreases (C) Remains unchanged (D) Increases exponentially
Last Answer : (B) Decreases
Description : With increase in the ratio of orifice diameter to pipe diameter in case of an orificemeter, the overall pressure loss (A) Decreases (B) Increases (C) Remain constant (D) Increases linearly
Last Answer : (C) Remain constant
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 : The top of the weir over which the water flows is known as (A) Sill or crest (B) Nappe or vein (C) Orifice (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
Description : Bernoulli's equation is applied to (A) Venturimeter (B) Orifice meter (C) Pitot tube (D) All of these
Description : A structure used to dam up a stream or river over which the water flows is called (A) Orifice (B) Notch (C) Weir (D) Dam
Description : 4 The sheet of water flowing over a notch or a weir is known as (A) Sill or crest (B) Nappe or vein (C) Orifice (D) None of thes