Q.1

To have zero active pressure intensity at the tip of a wall in cohesive soil, one should apply a uniform surcharge intensity of

  • 2c tan α
  • 2c cot α
  • - 2c cot α
  • - 2c tan α
Q.2

The values of liquid limit and plasticity index for soils having common geological origin in a rectricted locality usually define

  • A zone above A-line
  • A straight line parallel to A-line
  • A straight line perpendicular to A-line
  • Points may be anywhere in the plasticity chart
Q.3

Critical factors for the activated sludge treatment process are

  • maximum hourly flow rate.
  • maximum and minimum flow rate.
  • maximum hourly flow rate and maximum daily organic load.
  • minimum hourly flow rate and minimum daily organic load.
Q.4

If an element of a stressed body is in a state of pure shear with a magnitude ofN/mm2 , the magnitude of maximum principal stress at that location is

  • 80 N/mm2
  • 113.14 N/mm2
  • 120 N/mm2
  • 56.57 N/mm2
Q.5

The repeating variables in dimensional analysis should :

  • include the dependent variable
  • have amongst themselves all the basic dimensions
  • be derivable from one another
  • exclude one of the basic dimensions
Q.6

Chlorine is some times used in sewage treatment

  • to avoid flocculation
  • to increase biological activity of bacteria
  • to avoid bulking of activated sludge
  • to help in grease separation
Q.7

The relationship between the length (l) and radius (r) of an ideal transition curve is given by

  • lr
  • lr2
  • l ∝ 1/r
  • l ∝ 1/r2
Q.8

The shape of clay particle is usually

  • angular
  • flaky
  • tubular
  • rounde
Q.9

A light house ofm height is just visible above the horizon from a ship. The correct distance (m) between the ship and the light house considering combined correction for curvature and refraction, is

  • 39.098
  • 42.226
  • 39098
  • 42226
Q.10

In deriving the equation for the hydraulic jump in a rectangular channel in terms of the conjugate depths and the initial Froude number.

  • continuity equation and energy equation are used
  • continuity equation and momentum equation are used
  • equations of continuity, mementum and energy are used
  • gradually varied flow equation is used
Q.11

The following characteristics pertain to the sand filters used in water industry.

  1. Filtration rate is 1 to 4 m3 (m2 day).
  2. Typical duration of operation in one run istohours.
  3. Operating cost is low.

Which of the above characteristics pertain to slow sand filters ?
  • I, II and III
  • I and II
  • II and III
  • I and III
Q.12

The dimension of a pressure gradient in a fluid flow are :

  • ML-1T2
  • ML-3T-2
  • ML-2T-2
  • M-1L-1T-2
Q.13

The ideal form of curve for the summit curve is :

  • spiral
  • parabola
  • circle
  • lemniscate
Q.14

Sewage treatment in an oxidation pond is accomplished primarily by :

  • alga-bacterial symbiosis
  • algal photosynthesis only
  • bacterial oxidation only
  • chemical oxidation only
Q.15

MPN index is a measure of one of the following :

  • Coliform bacteria
  • BOD5
  • Dissolved Oxygen Content
  • Hardness
Q.16

The minimum dissolved oxygen content (ppm) in a river necessary for the survival of aquatic life is

  • 0
  • 2
  • 4
  • 8
Q.17

The width of expansion joint gap is 2.5 cm in a cement concrete pavement. The spacing between expansion joints for a maximum rise in temperature of 25°C is, (assuming coefficient of thermal expansion of concrete asx 10-6 per degree C),

  • 5 m
  • 50 m
  • 100 m
  • 25 M
Q.18

As per IS : 800-the maximum allowable slenderness ratio of compression members carrying forces resulting from dead load and superimposed load is

  • 180
  • 250
  • 300
  • 400
Q.19

Water distribution systems are sized to meet the

  • maximum hourly demand
  • average hourly demand
  • maximum daily demand and fire demand
  • average daily demand and fire demand.
Q.20

The removal of dissolved organic matter occurs in

  • slow sand filters
  • trickling filters
  • rapid sand filters
  • dual media filters
Q.21

Water flows at a depth of 0.1 m with a velocity of 6 m/s in a rectangular channel. The alternate dpeth is

  • 0.30 m
  • 0.40 m
  • 0.86 m
  • 0.81 m
Q.22

Design rate of super elevation for horizontal highway curve of radiusm for a mixed traffic condition, having a speed ofkm/hour is

  • 1.0
  • 0.05
  • 0.07
  • 0.154
Q.23

The comparison between pumps operating in series and in parallel is :

  • Pumps operating in series boost the discharge, whereas pumps operating in parallel boost the head.
  • Pumps operating in parallel boost the discharge, whereas pumps operating in series boost the head.
  • In both cases there would be a boost in discharge only.
  • In both cases there would be a boost in head only.
Q.24

The deflection of a cantilever beam at free end b applied with a moment M at the same point is :

  • M l2/EI
  • M l2/2 EI
  • M l2/3 EI
  • M l2/4 EI
Q.25

The value of the camber recommended for cement concrete roads in areas of heavy rainfall is :

  • 1 in 25
  • 1 in 33
  • 1 in 40
  • 1 in 50
Q.26

An important purpose of prime coats is to:

  • promote the bond between the base and the wearing courses
  • promote the adhesion between an existing wearing surface and a subsequent wearing surface
  • promote the bond between the sub-base cause and the sub-grade
  • increase the stability of the sub-grade
Q.27

The width of expansion joint gap is 2.5 cm in a cement concrete pavement. The spacing between expansion joints for a maximum rise in temperature of 25°C is, (assuming coefficient of thermal expansion of concrete asx 10-6 per degree C),

  • 5 m
  • 50 m
  • 100 m
  • 25 M
Q.28

Effective length of a rafter member between two nodes at a distance L, perpendicular to the plane of the truss, is : .

  • 2.00 L
  • 0.85
  • 1.50
  • 1.00 L
Q.29

Maximum strain at the level of compression steel for a rectangular section having effective cover to compression steel as d' and neutral axis depth from compression face as xu is

  • 0.0035 (1 - d'/xu)
  • 0.002 (1 - d'/xu)
  • 0.0035 (1 - xu/d')
  • 0.002 (1 - xu/d')
Q.30

A septic tank is

  • an aerobic method of on site sewage treatment
  • an anaerobic method of on site treatment
  • a physical method of water treatment
  • a physicochemical method of water treatment
0 h : 0 m : 1 s