With usual notations, the expression V²/gR represents
(A) Centrifugal force
(B) Centrifugal ratio
(C) Super elevation
(D) Radial acceleration
Description : If is the speed of a locomotive in km per hour, g is the acceleration due to gravity, is the distance between running faces of the rails and is the radius of the circular curve, the required super elevation is (A) gV²/GR (B) Rg/GV² (C) GR/gV² (D) GV²/gR
Last Answer : (D) GV²/gR
Description : If V is speed of a moving vehicle, r is radius of the curve, g is the acceleration due to gravity, W is the width of the carriageway, the super elevation is (A) WV/gr (B) W²V/gr (C) WV²/gr (D) WV/gr²
Last Answer : Answer: Option C
Description : The length of a transition curve, is governed by (A) Rate of change of radial acceleration (B) Rate of change of super-elevation (C) Both (a) and (b) (D) Neither (a) nor (b)
Description : The correct formula for calculating super-elevation for the hill roads, is (A) e = V²/254 R (B) e = V²/225 R (C) e = V²/278 R (D) e = V²/114 R
Last Answer : Answer: Option B
Description : If V is speed in km/hour and R is radius of the curve, the super-elevation e is equal to (A) V²/125 R (B) V²/225 R (C) V²/325 R
Description : If the rate of gain of radial acceleration is 0.3 m per sec3 and full centrifugal ratio is developed. On the curve the ratio of the length of the transition curve of same radius on road and railway, is (A) 2.828 (B) 3.828 (C) 1.828 (D) 0.828
Last Answer : (A) 2.828
Description : With usual notations the depth of the neutral axis of a balanced section, is given by (A) mc/t = (d - n)/n (B) t/mc = (d - n)/n (C) t/mc = (d + n)/n (D) mc/t = n/(d - n)
Last Answer : Answer: Option D
Description : Pick up the incorrect statement from the following. The super-elevation on roads is (A) Directly proportional to width of pavement (B) Directly proportional to velocity of vehicles (C) Inversely proportional to acceleration due to gravity (D) Inversely proportional to the radius of curvature
Description : A particle is moving in a uniform circular motion with constant speed v along a circle of radius r. The acceleration-of the particle is – (1) zero (2) V/r (3) V/r² (4) V²/r
Last Answer : (4) V²/r Explanation: When a particle is moving in a uniform circular motion with constant speed and radius. the acceleration of the particle is given by v2/r. The particle will exhibit centripetal acceleration.
Description : An object moving in a circle of radius ‘r’ with a constant speed ‘v’ has a constant acceleration towards the center equal to A. v²⁄r B. v⁄r C. v²×r D. v×r
Last Answer : v²⁄r
Description : The elevation Z of the watershed is: (where letters carry their usual meanings) (A) Reduced level of the top most point of the basin (B) Reduced level of the lower most point of the basin (C) Average ... highest and lowest point of the drainage basin (D) Obtained by the formula Z = + + + anzn)/A
Description : Van der Waals derived an expression for the pressure defect', if the observed pressure is denoted as p' and volume is denoted as V', the gas pressure in the bulk of the gas is equal to: A. p + ... a: constant for the particular gas D. p + (a V²); where a: constant for the particular gas
Last Answer : p + a/(V²); where a: constant for the particular gas
Description : Pick up the correct statement from the following regarding radial flow centrifugal pumps: (A) These are provided with volute type or turbine type casings (B) In involute type of radial flow ... centrifugal pump, is always higher than that of volute type (D) All the above
Last Answer : (D) All the above
Description : Conversion of dynamic velocity head into static pressure head in a centrifugal pump is the result of : (a) Increasing area of flow between adjacent vanes from inlet to outlet (b) Difference in pressure between suction and delivery ends (c) Radial thrust in pumps (d) Stuffing Box
Last Answer : (b) Difference in pressure between suction and delivery ends
Description : Two bodies of equal mass are moving in circular paths at equal speed. The first body moves in a circle whose radius is twice as great as that of the second. The ratio of the centripetal or radial acceleration of the first body to that of the second is: w) 1 to 4 x) 1 to 3 y) 1 to 2 z) 1 to 1
Last Answer : ANSWER: Y -- 1 TO 2
Description : If V is the design speed of vehicles in km/hour, the change of radial acceleration in metres/sec3 , is (A) 65/(70 + V) (B) 60/(70 + V) (C) 70/(65 + V) (D) 70/(60 + V)
Description : The total length of a valley formed by two gradients - 3% and + 2% curve between the two tangent points to provide a rate of change of centrifugal acceleration 0.6 m/sec2 , for a design speed 100 kmph, is (A) 16.0 m (B) 42.3 m (C) 84.6 m (D) None of these
Description : An imaginary line joining the points of equal elevation on the surface of the earth, represents (A) Contour surface (B) Contour gradient (C) Contour line (D) Level line
Last Answer : (C) Contour line
Description : For a fluid rotating at constant angular velocity about vertical axis as a rigid body, the pressure intensity varies as the (A) Square of the radial distance (B) Radial distance linearly (C) Inverse of the radial distance (D) Elevation along vertical direction
Last Answer : (A) Square of the radial distance
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
Last Answer : Answer: Option A
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 : If V is the velocity in kmph, t the stopping distance S of the vehicle, is (A) 0.28V²t + V/0.01 (B) 0.28Vt + V²/0.1 (C) 0.28Vt + 0.01 (D) 0.28Vt + 0.01 V²/
Description : The safe stopping sight distance D, may be computed from the equation (A) D = 0.278 Vt + V²/254f (B) D = 0.254 Vt + V²/278f (C) D = 0.254 Vt + V²/225f (D) D = 0.225 Vt + V²/254f
Description : If V is the design speed in km/hour and R is the radius of the curve of a hill road, the superelevation (A) e = V / 127 R (B) e = V² / 127 R (C) e = V ²/ 225 R (D) e = V / 225 R
Description : Transition curves are introduced at either end of a circular curve, to obtain (A) Gradually decrease of curvature from zero at the tangent point to the specified quantity at the junction of the ... specified amount at the junction of the transition curve with main curve (D) None of these
Last Answer : (B) Gradual increase of super-elevation from zero at the tangent point to the specified amount at the junction of the transition curve with main curve
Description : Maximum super-elevation on hill roads should not exceed (A) 5 % (B) 7 % (C) 8 % (D) 10 %
Description : If x% is the gradient of an alignment and y% is the gradient after proper super-elevation along a curved portion of a highway, the differential grade along the curve, is (A) (x + y) % (B) (x - y) % (C) (y - x) % (D) (y + x) %
Description : The convexity provided to the carriageway between the crown and edge of the pavement, is known as (A) Super-elevation (B) Camber (C) Height of the pavement (D) None of these
Description : If the designed speed on a circular curve of radius 1400 m is 80 km/hour, no super-elevation is provided, if the camber, is (A) 4 % (B) 3 % (C) 2 % (D) 1.7 %
Description : Before providing super-elevation on roads, the portion of the carriageway between the crown and the outer edge is made (A) To have a reduced fall (B) Horizontal (C) To have slope of the camber on the other half of the carriageway (D) None of these
Description : no super elevation is provided on a road along curves, pot holes may develop at (A) Inner edge of the road (B) Outer edge of the road (C) Centre of the road (D) Nowhere on the road
Description : If the rate of change of the super-elevation along a curved portion of a 7 metre wide road is 1 in 150 and the maximum super-elevation allowed is 1 in 15, the maximum length of the transition curve to be provided at either end, is (A) 65 m (B) 70 m (C) 75 m (D) 80 m
Description : Raising of outer edge of a road with respect to inner edge, is known (A) Super elevation (B) Cant (C) Banking (D) All the above
Description : Design of horizontal and vertical alignments, super-elevation, sight distance and grades, is worst affected by (A) Width of the vehicle (B) Length of the vehicle (C) Height of the vehicle (D) Speed of the vehicle
Description : The minimum super-elevation in rolling terrain in plains, is limited to (A) 4 % (B) 5 % (C) 6 % (D) 7 %
Description : Super-elevation on roads in snow bound areas, should generally not exceed (A) 15 % (B) 12 % (C) 10 % (D) 7 %
Description : If the width of carriage way is 12.5 metres, outer edge 50 cm higher than the inner edge, the required super elevation is (A) 50 cm (B) 1 in 25 (C) 1 in 400 (D) 1 in 40
Description : To ensure that bullock carts may not overturn on curves, the maximum value of super-elevation, recommended by I.R.C., is (A) 1 in 10 (B) 1 in 12 (C) 1 in 15 (D) 1 in 20
Description : The advantage of providing super-elevation on roads, is (A) Higher speed of vehicles (B) Increased volume of traffic (C) Reduced maintenance cost of the roads (D) All the above
Description : The difference in gradients after full super-elevation and the initial alignment of a road, is known as (A) Ruling gradient (B) Rising gradient (C) Compensated gradient (D) Differential gradient
Description : A district road with a bituminous pavement has a horizontal curve of 1000 m for a design speed of 75 km ph. The super-elevation is (A) 1 in 40 (B) 1 in 50 (C) 1 in 60 (D) 1 in 70
Description : If the coefficient of friction on the road surface is 0.15 and a maximum super-elevation 1 in 15 is provided, the maximum speed of the vehicles on a curve of 100 metre radius, is (A) 32.44 km/hour (B) 42.44 kg/hour (C) 52.44 km/hour (D) 62.44 km/hour
Description : The most commonly adopted method to provide super-elevation on roads, is by pivoting the road surface about (A) Outer edge so that the inner edge is lowered (B) Crown so that outer edge is raised and inner edge is lowered (C) Inner edge so that outer edge is raised (D) None of these
Description : Which one of the following types of impeller vanes are most commonly used in centrifugal type compressors? A. Forward curved B. Radial C. Backward curved D. Tangential
Last Answer : ANSWER : C
Description : A centrifugal filtration unit operating at a rotational speed of w has inner surface of the liquid (density ρL) located at a radial distance R from the axis of rotation. The thickness of the liquid film is δ and no cake is formed. The ... . ρL (C) ½w 2 . δρL (2R + δ) (D) ½w 2 . R . ρL(R + 2δ)
Last Answer : (C) ½w 2 . δρL (2R + δ)
Description : Higher specific speed (200-500) of a centrifugal pump indicates that the pump is of __________ flow type. (A) Axial (B) Radial (C) Mixed (D) None of these
Last Answer : (A) Axial
Description : A mixed flow centrifugal pump (A) Employs such an impeller, through which the flow is a combination of radial & axial flow (B) Mixes the two fluids before pumping them (C) Pumps the two fluids separately and then mixes them (D) Employs impellers in both the radial & axial directions
Last Answer : (A) Employs such an impeller, through which the flow is a combination of radial & axial flow
Description : A rectangular surface 3' × 4', has the lower 3 edge horizontal and 6' below a free oil surface (sp. gr. 0.8). The surface inclination is 300 with the horizontal. The force on one side of the surface is (where, y = specific weight of water) (A) 39.6y (B) 48y (C) 49.2y (D) 58y
Last Answer : (B) 48y
Description : If the atmospheric pressure on the surface of an oil tank (sp. gr. 0.8) is 0.2 kg/cm", the pressure at a depth of 50 m below the oil surface will be (A) 2 meters of water column (B) 3 meters of water column (C) 5 meters of water column (D) 6 meters of water Column