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
Last Answer : Answer: Option 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 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
Last Answer : Answer: Option A
Description : The upper surface of a weir over which water flows is known is (A) Crest (B) Nappy (C) Sill (D) Weir top
Last Answer : Answer: Option C
Description : The absolute percentage error in the computed discharge over a rectangular weir corresponding to an absolute error of 1.5 % in the measurement of head over the sill of the weir would be : (a) 1.5 (b) 2.25 (c) 2.5 (d) 3.75
Last Answer : (b) 2.25
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 : __________ employs a set of screen across a flow channel for the separation of dirt/rust from a flowing liquid stream. (A) Thickener (B) Classifier (C) Strainer (D) Clarifier
Last Answer : (C) Strainer
Description : The discharge over a rectangular notch is (where b = Width of notch, and H = Height of liquid, above the sill of the notch) (A) (2/3) Cd × b × gH) (B) (2/3) Cd × b × g) × H (C) (2/3) Cd × b × g) × H 3/2 (D) (2/3) Cd × b × g) × H
Description : When water is filled in a bottle and is allowed to freeze, the bottle breaks because _____? A. Water expands on freezing B. Bottle contracts at freezing point C. Temperature outside the bottle is less than that inside the bottle D. None of them
Last Answer : ANSWER: A
Description : Water pipes in hilly areas often burst on a cold frosty night, because – (1) The material of which pipes are made contracts due to cold and so breaks (2) Water in the pipes freezes and on freezing water expands, so pipes break (3) Frost makes the pipes rusty, so they break (4) None of these
Last Answer : (2) Water in the pipes freezes and on freezing water expands, so pipes break Explanation: The temperature may fall below 0° C during cold frosty nights which converts the water inside the pipes into ice, ... in an increase in volume. This exerts great force on the pipes and as a result, they burst.
Description : When a ring of metal is heated what happens to its hole? (1) expands (2) contracts (3) it expands or contracts according to its diameter (4) it expands or contracts according to its coefficient of expansion
Last Answer : (1) expands Explanation: The hole size will increase because in expansion the size between two molecules, do not increase so when the molecules on the outer edge move outward. Due to expansion, the ... expansion is the tendency of matter to change in volume in response to a change in temperature.
Description : When hot-water is sprinkled on a hotter glass tumbler, it breaks because – (1) glass suddenly expands (2) glass suddenly contracts (3) water evaporates (4) glass reacts chemically with water
Last Answer : (2) glass suddenly contracts Explanation: If the poured liquid is relatively hotter or colder in comparison to the tumbler, it will break. When hot water is poured into a tumbler there is an uneven increase in the thermal expansion of the walls of the vessel.
Description : When water is filled in a bottle and is allowed to freeze, the bottle breaks because A. Water expands on freezing (Answer) B. Bottle contracts at freezing point C. temperature outside the bottle is less than that inside the bottle. D. None of the above
Last Answer : A. Water expands on freezing (Answer)
Description : Water on heating from 1 to 4°C (A) Contracts (B) Expands (C) Has same volume (D) May contract or expand
Last Answer : (A) Contracts
Description : As water solidifies it does one of the following: w) gives off heat and contracts x) gives off heat and expands y) takes in heat and contracts z) takes in heat and expands
Last Answer : ANSWER: X -- GIVES OFF HEAT AND EXPANDS
Description : When hot-water is sprinkled on a hotter glass tumbler, it breaks because (1) glass suddenly expands (2) glass suddenly contracts (3) water evaporates (4) glass reacts chemically with water
Last Answer : glass suddenly contracts
Description : Water pipes in hilly areas often burst on a cold frosty night, because (1) the material of which pipes are made contracts due to cold and so breaks (2) water in the pipes freezes and on freezing water expands, so pipes break (3) frost makes the pipes rusty, so they break (4) None of these
Last Answer : water in the pipes freezes and on freezing water expands, so pipes break
Description : When a ring of metal is heated what happens to its hole ? (1) expands (2) contracts (3) it expands or contracts according to its diameter (4) it expands or contracts according to its coefficient of expansion
Last Answer : expands
Description : Which of the following statement is correct? (A) In a compressible flow, the volume of the flowing liquid changes during the flow (B) A flow, in which the volume of the flowing liquid does not change, ... their own axes while flowing, the flow is said to be rotational flow (D) All of the above
Last Answer : Answer: Option D
Description : Pick up the correct statement from the following: (A) Run off and surface run off are the same (B) Run off includes the water flowing over the surface (C) Run off is sometimes called discharge of the river (D) Surface run off is sometimes called stream flow
Description : An opening in the side of a tank or vessel such that the liquid surface with the tank is below the top edge of the opening, is called (A) Weir (B) Notch (C) Orifice (D) None of these
Description : The loss of head due to viscosity for laminar flow in pipes is (where d = Diameter of pipe, l = Length of pipe, v w = Specific weight of the flowing liquid) (A) 4 (B) 8 (C) 16 (D) 32
Description : Water may not contain much impurity if its source is (A) Reservoirs (B) Stream flowing in plains (C) Lakes in lower regions (D) Spring along hill slopes
Last Answer : (D) Spring along hill slopes
Description : The total energy of each particle at various places in the case of perfect incompressible fluid flowing in continuous stream (A) Keeps on increasing (B) Keeps on decreasing (C) Remain constant (D) May increase/decrease
Description : Generally the weir is aligned at right angles to the direction of the main river current because (A) It ensures less length of the weir (B) It gives better discharging capacity (C) It is economical (D) All of the above
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 : A flow in which the quantity of liquid flowing per second is constant, is called __________ flow. (A) Steady (B) Streamline (C) Turbulent (D) Unsteady
Description : When the sun expands into the Earth and all life ends, what song would you play for the rolling credits?
Last Answer : It's the end of the world as we know it... -REM
Description : In a broad-crested weir, the discharge is maximum if the head of water on the downstream side of weir is __________ the head of water on the upstream side of weir. (A) Equal to (B) One-third (C) Two-third (D) Three-fourth
Description : The Cipoletti weir is a __________ weir. (A) Rectangular (B) Triangular (C) Trapezoidal (D) Circular
Description : A weir is said to be narrow-crested weir, if the width of the crest of the weir is __________ half the height of water above the weir crest. (A) Equal to (B) Less than (C) More than (D) None of these
Description : 19. The water hammer in pipes occurs due to sudden change in the velocity of flowing liquid A) Agree B) Disagree
Description : When a gas or a liquid is subjected to an increased pressure, the substance contracts, the bulk strain is defined as A. final volume ⁄ original volume B. final pressure ⁄ original pressure C. change in volume ⁄ original volume D. original volume ⁄ change in volume
Last Answer : change in volume ⁄ original volume
Description : A gas thermometer is more sensitive than a liquid thermometer because a gas: (1) is lighter than liquid (2) expands more than a liquid (3) is easy to obtain (4) does not change state easily
Last Answer : (4) does not change state easily Explanation: Gas is easily compressed so it would have a more versatile range of measurement at least in our atmospheric conditions. Liquid is not so ... apparatus is a constant volume thermometer. Gas thermometers are often used to calibrate other thermometers.
Description : A gas thermometer is more sensitive than a liquid thermometer because a gas : (1) is lighter than liquid (2) expands more than a liquid (3) is easy to obtain (4) does not change state easily
Last Answer : does not change state easily
Description : Horizontal construction joints in concrete walls are generally provided at (A) Soffit level (B) Window sill level (C) Floor level (D) All the above
Description : The projections of head or sill of a door or window frame are (A) Transoms (B) Horns (C) Stops (D) Chock
Description : The sill of a common wooden partition is (A) Vertical wooden member on either end (B) Lower horizontal wooden member (C) Upper horizontal wooden member (D) Intermediate horizontal wooden member
Description : A depth-discharge relationship of the canal section is maintained at a notch fall because the sill of the notches is : a) Level with downstream canal bed b) Below the upstream canal bed c) Level with upstream canal bed d) Above the upstream canal bed
Last Answer : c) Level with upstream canal bed
Description : The flow of water after spilling over the weir crest in chute spillway and side channel spillway respectively are (A) At right angle and parallel to weir crest (B) Parallel and at right angle to weir crest (C) Parallel to weir crest in both (D) At right angle to weir crest in both
Description : 06. The formula for discharge over a sharp-crested weir and Ogee weir is same as that of a rectangular weir. A) Agree B) Disagree
Description : The Francis formula for the discharge over Cipoletti weir is (A) 1.84 LH1/2 (B) 1.84 LH (C) 1.84 LH3/2 (D) 1.84 LH5/
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 : According to Bazin's formula, the discharge over a rectangular weir is mL2g x H 3/2where m is equal to (A) 0.405 + (0.003/H) (B) 0.003 + (0.405/H) (C) 0.405 + (H/0.003) (D) 0.003 + (H/0.405)
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 maximum discharge over a broad crested weir is (A) 0.384 Cd × L × H1/2 (B) 0.384 Cd × L × H3/2 (C) 1.71 Cd × L × H1/ (D) 1.71 Cd × L × H 3/
Description : Recycling back of outlet stream to the reactor from an ideal CSTR carrying out a first order liquid phase reaction will result in __________ in conversion. (A) Decrease (B) Increase (C) No change (D) Either (A) or (B), depends on the type of reaction
Last Answer : (C) No change
Description : Which of the following situations can be approximated to a steady state heat transfer system? (A) A red hot steel slab (having outside surface temperature as 1300°C) exposed to the atmospheric air at ... flowing at the rate of 6 Kg/minute through a copper pipe exposed to atmospheric air at 35°C
Last Answer : (B) 10 kg of dry saturated steam at 8 kgf/cm2 flowing through a short length of stainless steel pipe exposed to atmospheric air at 35°C
Description : What is a flowing stream of fresh water that originates from A mountain?
Last Answer : Valley
Description : Water is flowing in a stream with velocity 5 km/hr in an easterly direction relative to the shore. Speed of a boat relative to still
Last Answer : Water is flowing in a stream with velocity 5 km/hr in an easterly direction relative to the ... , with what velocity will the boat actually travel?