301. What is the maximum number of passenger cars that can pass a given point on a lane or roadway during one hour under ideal roadway and traffic conditions, known as ?
302. In PERT, the actual time duration along the critical path for the project completion time is probabilistic. It is usually presumed to follow which one of the following ?
303. Why are moorings provided ?
304. Allowable disposable rate of application of sludge on land is determined by
305. Which of the following treatments reduce salinity of water
1. Flash mixing and sedimentation
2. Electrodialysis
3. Reverse osmosis
4. Freezing
5. Filtration
Select the correct answer using the codes given below:
306. Why is lime added to cement slurry for the topcoat of plastering ?
307. A concentrated load W moves on the span of a three-hinged arch. The horizontal thrust at the supports is maximum when the load is at which one of the following ?
308. A 30 m steel tape was standardised at 20°C measurements of distances were taken as 15°C. If the coefficient of linear expansion of the material of the tape were 0.00, 00112 degree centigrade, then the error, due to temperature, per tape length would be
309. A mixture of water and alcohol can be separated by:?
310. Which one of the following is not related to theories of creep of rails ?
311. Preliminary project report for a road project must contain
312. The final deflection due to all loads including the effects of temperature, creep and shrinkage and measured from as-cast level of supports of floors, roofs and all other horizontal members should NOT exceed
313. Why are bricks soaked in water before using in brick masonry ?
314. A bed of sand consists of three horizontal layers of equal thickness. The value of Darcy's k for the upper and lower layers is 1 x 10-2 cm/sec and that for the middle layer is 1 x 10-1 cm/sec. The ratio of the permeability of the bed in the horizontal direction to that in the vertical direction is
315. Consider the following statements relating to hydraulic gradient line and energy gradient line
1. In the case of a fluid flowing in a pipeline, hydraulic gradient line and energy gradient line may coincide.
2. The line joining the points representing piezometric heads is known as hydraulic gradient line.
3. In the case of ideal fluid, energy gradient line is always horizontal.
4. Hydraulic gradient line has a downward slope in the case of flow through pipes.
Of these statements :
316. An open cylindrical vessel with axis vertical and filled with a liquid is falling freely with an acceleration What will be the absolute pressure at the base of the vessel ?
317. Dechlorination of water is achieved by adding
318. On which of the following is the working principle of concrete hammer for non-destructive test based ?
319. Given for a soil sample :
Degree of saturation = 90%
Specific gravity of soil grains = 2.70
Void ratio = 0.30
The water content of the sample is
320. The pattern of Centre - State relations in India can be traced back to?
321. Consider the following factors :
1. Air traffic control measures
2. Aircraft traffic composition
3. VFR/IFR operation
4. Runway configuration
Which of these factors affect the capacity of a runway ?
322. A city supply of 15000 cubic metres of water per day is treated with a chlorine dosage of 0.5 ppm. For this purpose, the requirement of 25% bleaching powder per day would be
323. The ratio between the stress produced in a bar by a sudden application of load (impact loading) as compared to the stress produced by the gradual application of same load is
324. The shear stress distribution over a rectangular cross-section of a beam follows
325. Which among the following brings about the Hazardous Waste Management and Handling Rules in India?