Presence of excess nitrates in river water indicates :

The number of revolutions of a current meter inseconds were found to beandcorresponding to the velocities of 0.and 0.m/s respectively. What velocity (in m/s) would be indicated byrevolutions of that current meter in one minute ?

One of the probable causes of rutting on flexible pavements is

Both Reynolds and Froude numbers assume significance in one of following examples :

Stopping sight distance is the minimum distance available on a highway which is the

Determine the correctness of otherwise of the following Assertion [A] and the Reason [R].

Assertion [A] : The crown of the outgoing larger diameter sewer is always matched with the crown of incoming smaller diameter sewer.

Reason [R] : It eliminates backing up of sewage in the incoming smaller diameter sewer.

The toughness index of clayey soils is given by

Two footings, one circular and the other square, are founded on the surface of a purely cohesionless soil. The diameter of the circular footing is same as that of the side of the square footing. The ratio of their ultimate bearing capcities is

A mild steel specimen is under uni-axial tensile stress. Young's modulus and yield stress for mild steel are 2 x 10⁵ MPa andMPa respectively. The maximum amount of strain energy per unit volume that can be stored in this speciment without permanent set, is

At highway stretches where the required overtaking sight distance cannot be provided, it is necessary to incorporate in such sections the following :

A waste water sample diluted totimes with aeration water had an initial dissolved oxygen (DO) of 7.0 mg/l and after 5 days of incubation at 20°C, the DO was zero. The BOD of waste water is :

A trickling filter is primarily a :

The focal length of the object glass of a tacheometer ismm, the distance between the vertical axis of the tachometer and the optical centre of the object glass ismm 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

At highway stretches where the required overtaking sight distance cannot be provided, it is necessary to incorporate :

Two steel plates each of widthmm and thicknessmm are connected with threemm diameter rivets placed in a zig-zag pattern. The pitch of the rivets ismm and gauge ismm. If the allowable tensile stress isMPa, the maximum tensile force that the joint can withstand is

A lysimeter is used to measure :

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 :

A direct shear test was conducted on a cohesionless soil (c =specimen under a normal stress ofkN/m². The specimen failed at a shear stress ofkN/m². The angle of internal friction of the soil (degrees) is

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

An isochrone is a line on the basin map

A pile of 0.m diameter and of lengthm is embedded in a deposit of clay. The un-drained strength parameters of the clay are cohesion =kN/m² and the angle in internal friction =The skin friction capacity (kN) of the pile for an adhesion factor of 0.is

A soil having particles of nearly the same size is known as

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

Allowable average shear stress in an un-stiffened web for beams made of steel of gradeN/mm² is :

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

In IS :(the permissible compressive stress in column is based on :

Negative skin friction occurs when :

The order or the flexibility matrix for a structure is,

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

Muskingum method for routing of flood