26901. The following characteristics pertain to the sand filters used in water industry. Filtration rate is 1 to 4 m3 (m2 day).Typical duration of operation in one run is 24 to 72 hours.Operating cost is low.
Which of the above characteristics pertain to slow sand filters ?
26902. Effective length of a rafter member between two nodes at a distance L, perpendicular to the plane of the truss, is : .
26903. Consistency Index for a clayer soil is [LL = Liquid Limit, PL = Plastic Limit, PI = Plas-ticity Index, W - natural moisture content]
26904. The slope of the elastic curve at the free end of a cantilever beam of span L, and with fluxural rigidity EI, subjected to uniformly distributed load of intensity w is
26905. If duty (D) is 1428 hectares/cumec and base period (B) is 120 days for an irrigated crop, then delta (Δ) in meters is given by
26906. The repeating variables in dimensional analysis should :
26907. The minimum dissolved oxygen content (ppm) in a river necessary for the survival of aquatic life is
26908. Stopping sight distance is the minimum distance available on a highway which is the
26909. A body moving through still water at 6 m/sec produces a water velocity of 4 m/sec at a point 1 m ahead. The difference in pressure between the nose and the point 1 m ahead would be
26910. Critical factors for the activated sludge treatment process are
26911. MPN index is a measure of one of the following :
26912. One of the probable causes of rutting on flexible pavements is
26913. The basic assumption of plane sections normal to the neutral axis before bending, remaining plane and normal to the neutral axis after bending, leads to :
26914. Negative skin friction occurs when :
26915. The dimension of a pressure gradient in a fluid flow are :
26916. Rewrite as directed:How kind of you to help him like that! (Change into an assertive sentence)?
26917. Which three of the following were the Dravida Kingdom in India?
26918. The maximum shear stress in a solid shaft of circular cross-section having diameter d subjected to a torque T is τ. If the torque is increased by four times and the diameter of the shaft is increased by two times, the maximum shear stress in the shaft will be
26919. In a drained triaixal compression test, a saturated specimen of a cohesionless sand fails under a deviatoric stress of 3 kgf/cm2 when the cell pressure is 1 kgf/cm2 . The effective angle of shearing resistance of sand is about
26920. The particle size distribution curves are extremely useful for the classification of
26921. If an element of a stressed body is in a state of pure shear with a magnitude of 80 N/mm2 , the magnitude of maximum principal stress at that location is
26922. Three reservoirs A, B and C are interconnected by pipes as shown in the below figure Water surface elevations in the reservoirs and the Piezometric Head at the junction J are indicated in the below figure.
Discharges Q1, Q2 and Q3 are related as
26923. Both Reynolds and Froude numbers assume significance in one of following examples :
26924. A direct shear test was conducted on a cohesionless soil (c = 0) specimen under a normal stress of 200 kN/m2. The specimen failed at a shear stress of 100 kN/m2. The angle of internal friction of the soil (degrees) is
26925. The following two statements are made with reference to a simply supported under-reinforced RCC beam : Failure takes place by crushing of concrete before the steel has yieled.The neutral axis moves up as the load is increased.
With reference to the above statements, which of the following applies ?
26926. In deriving the equation for the hydraulic jump in a rectangular channel in terms of the conjugate depths and the initial Froude number.
26927. An important purpose of prime coats is to:
26928. A trickling filter is primarily a :
26929. A soil having particles of nearly the same size is known as
26930. The ideal form of curve for the summit curve is :
26931. A septic tank is
26932. At highway stretches where the required overtaking sight distance cannot be provided, it is necessary to incorporate :
26933. The members EJ and IJ of steel truss shown in the figure below are subjected to a temperature rise of 30° C. The coefficient of thermal expansion of steel is 0.000012 per °C per unit length. The displacement (mm) of joint E relative to joint H along the direction HE of the truss, is
26934. A-2-hour unit hydrograph can be approximated as trapezoidal as shown in the below figure. The unit hydrograph refers to catchment of area
26935. If the pump head is 75 m, discharge is 0.464 m3/s and the motor speed is 1440 rpm at rated condition, the specific speed of the pump is about
26936. When a retaining wall moves away from the backfill, the pressure exerted on the wall is termed as
26937. Two primary air pollutants are
26938. Flocculation is a process
26939. The effective length of a circular electric pole of length L and constant diameters erected on ground is,
26940. The focal length of the object glass of a tacheometer is 200 mm, the distance between the vertical axis of the tachometer and the optical centre of the object glass is 100 mm and the spacing between the upper and lower line of the diaphragm axis is 4 mm. With the line of collima-tion perfectly horizontal, the staff intercepts are 1 m (top), 2 m (middle), and 3 m (bottom). The horizontal distance (m) between the staff and the instrument station is
26941. Allowable average shear stress in an un-stiffened web for beams made of steel of grade 250 N/mm2 is :
26942. The superelevation needed for a vehicle travelling at a speed of 60 kmph on a curve of radius 128 m on a surface with a coefficient of friction of 0.15 is :
26943. The plastic modulus of a section is 4.8 x 10-4 m3. The shape factor is 1.2. The plastic moment capacity of the section is 120 kN.m. The yield stress of the material is
26944. A propped cantilever beam in shown in the below figure. The plastic moment capacity of the beam is M0. The collapse load P is
26945. The removal of dissolved organic matter occurs in
26946. The toughness index of clayey soils is given by
26947. A cantilever beam is shown in the below figure. The moment to be applied at free end for zero vertical deflection at that point is
26948. The order or the flexibility matrix for a structure is,
26949. The Bowen ratio is defined as :
26950. Water flows at a depth of 0.1 m with a velocity of 6 m/s in a rectangular channel. The alternate dpeth is