276. xx, x1 x1 and x2 x2 are parallel axes of which XX is the centroidal axis. If moment of inertia of the figure about x1 x1 axis is 10m4, what is the moment of inertia of the figure about x2 x2 axis?
277. As per Lacey's regime equation, what is the flow velocity proportional to ?
278. Which of the following types of pumps can be used for concreting ?
1. Piston operated.
2. Pneumatically operated.
3. Centrifugal operated, with straight blades.
4. Screw type.
279. For medium silt where average grain size is 0.16 mm, Lackey's silt factor is likely to be
280. Guide banks are provided to
281. A soil fails under an axial vertical stress of 100 kN/m2 in unconfined compression test. The failure plane makes an angle of 50° with the horizontal. The shear parameters c and φ respectively will be
282. The fix of a plane table from three known points is good if
283. A hollow steel shaft of external diameter 100 mm and internal diameter 50 mm is to be replaced by a solid alloy shaft. Assuming the same value of polar modulus for both, the diameter of the solid alloy shaft will be
284. For a circular curve of radius 200 m, the coefficient of lateral friction of 0.15 and the design speed is 40 kmph. The equilibrium superelevation (for equal pressure on inner and outer wheel) would be
285. A ball of mass 1 kg moving with a velocity 2 m/s collides directly with a m2 stationary ball of mass 2 kg. If the first ball comes to rest after the impact, what is the velocity of the second ball after impact ?
286. What is number of categories into which masonry buildings are divided on the basis of earthquake resistance features ?
287. A mild steel bar is 40 cm long. The lengths of parts AB and BC of the bar are 20 cm each. It is loaded as shown in the given figure. The ratio of the stresses, σ1 in part AB to σ2 in part BC is
288. Zero hardness of water is achieved by :
289. The normal duration and normal cost of an activity are 10 days and Rs 350/- respectively. The cost slope is Rs 75/- per day. If the crash duration is 8 days, then what is the crash cost of the activity ?
290. Laboratory vane shear test can also be used to determine
291. Consider the following statements regarding base-line measurements :
1. Very precise measurement can be done only on densely cloudy days or at nights.
2. Error due to application of non-standardised pull on the tape can be either cumulative or compensating type.
3. Intermediate obstructions in the measurement of base-lines can be cleared by erecting towers.
Of these statements :
292. In a hydraulic jump occurring in a horizontal rectangular channel, the sequent depths are 0.3 m and 1.2 m. What is the approximate value of energy loss in the jump ?
293. Acidic soils are reclaimed by
294. The function of coping is to serve as a :
295. Which one of the following statements is correct ? The function of an air vessel in a reciprocating pump is to obtain :
296. Dolphin is a type of which one of the following ?
297. A steel rod, 100 mm long is held between two rigid supports. It is heated by 20°C. If the coefficient of thermal expansion of the material of the rod is 15 x 10-6 /° C and modulus of elasticity is 200 x 103 MN/m2, what is the stress in the rod ?
298. Consider for following statements :
In an under-reinforced concrete beam,
1. actual depth of neutral axis is less than the critical depth of neutral axis.
2. concrete reaches ultimate stress prior to steel reaching the ultimate stress.
3. moment of resistance is less than that of balanced sections.
4. lever arm of resisting couple is less than that of balanced sections.
Which of the statements given above are correct ?
299. What is the appropriate field test to determine the in-situ undrained shear strength of a soft clay ?
300. The Chalisa or the Group of Forty was the nickname of?