Description : 15. The depth of water in a channel corresponding to the minimum specific energy is known as critical depth. A) Agree B) Disagree
Last Answer : A
Description : Consider the following statements in respect of critical flow in a wide rectangular channel: 1. The specific energy is minimum for a given discharge. 2. The discharge is maximum for a given specific energy 3. The specific force is minimum for a ... b) 1, 2, 3 & 4 (c) 1, 2 & 4 only (d) 2, 3 & 4 only
Last Answer : (b) 1, 2, 3 & 4
Description : Normal depth in open channel flow is the depth of flow corresponding to (A) Steady flow (B) Unsteady flow (C) Laminar flow (D) Uniform flow
Last Answer : Answer: Option D
Description : The ratio of the depth of flow to the diameter of the channel for maximum discharge in a circular channel in open channel flow is (A) 0.1 (B) 0.55 (C) 0.95 (D) 1.85
Last Answer : (C) 0.95
Description : According to Chezy's formula, the discharge through an open channel is (where A = Area of flow, C = Chezy's constant, m = Hydraulic mean depth, and i = Uniform slope in bed) (A) A × m × i) (B) C × m × i) (C) AC × m × i) (D) mi × A × C)
Last Answer : Answer: Option C
Description : The discharge through a channel of circular section will be maximum when the depth of water is __________ the diameter of the circular channel. (A) 0.34 times (B) 0.67 times (C) 0.81 times (D) 0.95 times
Description : The discharge through a channel of rectangular section will be maximum, if (A) Its depth is twice the breadth (B) Its breadth is twice the depth (C) Its depth is thrice the breadth (D) Its breadth is thrice the depth
Last Answer : Answer: Option B
Description : The discharge through a channel of trapezoidal section is maximum when (A) Width of channel at the top is equal to twice the width at the bottom (B) Depth of channel is equal to the width at the bottom ... equal to half the width at the top (D) The sloping side is equal to the width at the bottom
Description : 12. The flow at critical depth in an open channel is called torrential flow. A) Yes B) No
Last Answer : B
Description : If the depth of water in an open channel is greater than the critical depth, the flow is called (A) Critical flow (B) Turbulent flow (C) Tranquil flow (D) Torrential flow
Description : If the depth of water in an open channel is less than the critical depth, the flow is called (A) Critical flow (B) Turbulent flow (C) Tranquil flow (D) Torrential flow
Description : The critical depth meter is used to measure (A) Velocity of flow in an open channel (B) Depth of flow in an open channel (C) Hydraulic jump (D) Depth of channel
Description : Normal depth in open channel flow is the depth of flow in the channel (A) Corresponding to uniform flow (B) Measured normal to the channel bed (C) Corresponding to steady flow (D) None of these
Last Answer : (A) Corresponding to uniform flow
Description : channel is said to be of most economical cross-section, if (A) It gives maximum discharge for a given cross-sectional area and bed slope (B) It has minimum wetted perimeter (C) It involves lesser excavation for the designed amount of discharge (D) All of the above
Description : The maximum discharge through a circular channel takes place, when the depth of the fluid flow is __________ times the pipe diameter. (A) 0.25 (B) 0.5 (C) 0.66 (D) 0.95
Last Answer : (D) 0.95
Description : In open channel flow in a rectangular channel, the ratio between the critical depth and the initial depth, when a hydraulic jump occurs is (A) 0.5 (B) 0.84 (C) 1.84 (D) 1.25
Last Answer : (C) 1.84
Description : The critical depth in a channel can be produced (A) By raising the bottom of the channel (B) By lowering the bottom of the channel (C) By decreasing the width of the channel (D) Both (a) and (c) of above
Description : The maximum compressive stress at the top of a beam is 1600 kg/cm2 and the corresponding tensile stress at its bottom is 400 kg/cm2 . If the depth of the beam is 10 cm, the neutral axis from the top, is (A) 2 cm (B) 4 cm (C) 6 cm (D) 8 cm
Last Answer : (D) 8 cm
Description : A rectangular beam 20 cm wide is subjected to a maximum shearing force of 10,000 kg, the corresponding maximum shearing stress being 30 kg/cm2 . The depth of the beam is (A) 15 cm (B) 20 cm (C) 25 cm (D) 30 cm
Last Answer : (C) 25 cm
Description : The most economical channel section for the fluid flow is the one for which the discharge is maximum for a given cross-sectional area. Vertical velocity distribution in an open channel for laminar flow can be assumed to be (A) Parabolic (B) Hyperbolic (C) Straight line (D) None of these
Last Answer : (A) Parabolic
Description : In open channels, the specific energy is the (A) Total energy per unit discharge (B) Total energy measured with respect to the datum passing through the bottom of the channel (C) Total energy measured above the horizontal datum (D) Kinetic energy plotted above the free surface of water
Description : According to Manning's formula, the discharge through an open channel is (where M = Manning's constant) (A) A × M × m 1/2 × i2/3 (B) A × M × m 2/3 × i1/2 (C) A 1/2 × M 2/3 × m × i (D) A 2/3 × M 1/3 × m ×
Description : The meander pattern of a river is developed by (A) Average discharge (B) Dominant discharge (C) Maximum discharge (D) Critical discharge
Description : Economic height of a dam is the height corresponding to which (A) Cost of the dam per unit of storage is minimum (B) Amount of silting is less (C) Cost of dam per unit storage is maximum (D) Free board provided is least
Last Answer : (A) Cost of the dam per unit of storage is minimum
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 : If the depth of actual neutral axis of a doubly reinforced beam (A) Is greater than the depth of critical neutral axis, the concrete attains its maximum stress earlier (B) Is less ... critical neutral axis; the concrete and steel attain their maximum stresses simultaneously (D) All the above
Description : The critical section for finding maximum bending moment for footing under masonry wall is located (A) At the middle of the wall (B) At the edge of the wall (C) Halfway between the middle and edge of the wall (D) At a distance equal to effective depth of footing from the edge of the wall
Description : The expected discharge to be obtained from an open well sunk in coarse sand is 0.0059 cumec. If the working depression head of the well is 3 m, the minimum diameter of the well, is (A) 2 m (B) 2.25 m (C) 2.50 m (D) 3.00 m
Last Answer : (D) 3.00 m
Description : The speed at which the shaft runs so that the additional deflection of the shaft from the axis of rotation becomes ___________, is known as critical or whirling speed. (A) zero (B) minimum (C) maximum (D) infinite
Last Answer : (D) infinite
Description : The velocity through a channel of circular section will be maximum when the depth of water is __________ the diameter of the circular channel. (A) 0.34 times (B) 0.67 times (C) 0.81 times (D) 0.95 times
Description : The velocity corresponding to Reynold number of 2000 is called (A) Sub-sonic velocity (B) Super-sonic velocity (C) Lower critical velocity (D) Higher critical velocity
Description : The velocity corresponding to Reynold number of 2800, is called (A) Sub-sonic velocity (B) Super-sonic velocity (C) Lower critical velocity (D) Higher critical velocity
Description : The neutral axis corresponding to balanced section condition is termed as [ A ] Critical neutral axis [ B ] Centroidal neutral axis [ C ] Balanced neutral axis [ D ] All the above
Last Answer : [ A ] Critical neutral axis
Description : Pick up the correct statement from the following: (A) At a particular speed of operation, the head produced decreases with the increase of discharge (B) At zero discharge, discharge valve remaining closed ... which efficiency of a pump is maximum, is known as normal discharge (D) All the above
Last Answer : (D) All the above
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 : A weir is used to measure the large water discharge rate from a river or from an open channel. A weir is not of __________ shape. (A) Circular (B) Rectangular (C) Triangular (D) Trapezoidal
Last Answer : (A) Circular
Description : Pick up the correct statement from the following: (A) The difference of latest occurrence time and earliest expected time, is called slack (B) The activities connecting the events having zero slack, lie on the critical path (C) The critical path consumes the maximum time (D) All the above
Description : For completion of a project, the critical path of the network represents (A) Minimum time (B) Maximum time (C) Maximum cost (D) Minimum cost
Last Answer : (A) Minimum time
Description : A circular gravity aqueduct is not generally preferred to because of (A) Its maximum hydraulic mean depth (B) Maximum area per unit of wetted perimeter (C) Minimum cost of construction (D) Its proper support on the ground
Last Answer : (D) Its proper support on the ground
Description : Consider the following statements The general depth of scour calculated by Lacey's formula in a river represents the depth below the: 1. Maximum flood level in the river 2. Minimum flow water level in the river 3. Normal flow water ... 2, 3 and 4 b) 1, 2 and 3 only c) 2, 3 and 4 only d) 1 only
Last Answer : d) 1 only
Description : If L, B and D length, breadth and depth of water in a rectangular sedimentation tank of total discharge Q, the settling velocity, is (A) Q/H (B) Q/D (C) Q/(D × B) (D) Q/(L × B)
Last Answer : (D) Q/(L × B)
Description : If the velocities of flow of a stream of 10 m depth recorded by a current meter at depths of 2 m and 8 m are 0.7 m and 0.3 m respectively, the discharge per unit width of the stream in cubic metres, is (A) 2 (B) 3 (C) 4 (D) 5
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 : When a constant discharge 2.91 litres/sec. was obtained in a pumping test, the draw downs in the test wells at 3 m and 6.184 m were 2.6 m and 0.3 m respectively. If over-all depth of the pumping well was 16 m, the ... (A) 0.0005 cm/sec (B) 0.001 cm/sec (C) 0.002 cm/sec (D) 0.01 cm/sec
Description : A hyetograph is a graphical representation of (A) Rainfall intensity and time (B) Rainfall depth and time (C) Discharge and time (D) Cumulative rainfall and time
Last Answer : Answer: Option A
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 : Consider the following statements: Mitra's hyperbolic transition design is based on the principle that : 1. Flow depth in the canal, as well as the discharge, is constant 2. width of the canal varies along with the discharge 3. Rate ... a) 1, 2 and 3 b) 1 and 2 only c) 2 and 3 only d) 1 and 3 only
Last Answer : d) 1 and 3 only
Description : The ratio of rate of change of the discharge of an outlet to the rate of change of the discharge of distributing channel is called (A) Proportionality (B) Flexibility (C) Setting (D) Sensitivity
Description : A control meter is preferred to a weir because (A) It measures the discharge even in silt Leiden streams (B) The velocity of approach of the channel increases above the control, and thus removes the silt completely (C) It is not damaged by floating debris (D) All the above