Keeping the instrument height as 1½ m, length of staff 4 m, the up gradient of the ground 1 in 10,
the sight on the up slope must be less than
(A) 25 cm
(B) 20 m
(C) 45 m
(D) 10 m
Description : Keeping the instrument height as 1.5 m, length of staff 4 m, the slope of the ground as 1 in 10, the sight on the down-slope, must be less than (A) 30 m (B) 25 m (C) 20 m (D) 15 m
Last Answer : (B) 25 m
Description : The slope correction for a length of 30 m along a gradient of 1 in 20, is (A) 3.75 cm (B) 0.375 cm (C) 37.5 cm (D) 2.75 cm
Last Answer : (A) 3.75 cm
Description : A back sight (A) Is always taken on a point of known elevation or can be computed (B) Is added to the known level to obtain the instrument height (C) Taken on an inverted staff is treated as negative (D) All the above
Last Answer : (D) All the above
Description : A sewer is laid from a manhole to a manhole , 250 m away along a gradient of 1 in 125. If the reduced level of the invert at is 205.75 m and the height of the boning rod is 3 m, the reduced level of the sight rail at , is (A) 208.75 m (B) 202.75 m (C) 206.75 m (D) 211.75 m
Last Answer : (C) 206.75 m
Description : The difference of level between a point below the plane of sight and one above, is the sum of two staff readings and an error would be produced equal to (A) The distance between the zero of ... Thrice the distance between the zero of graduation and the foot of the staff (D) None of the above
Last Answer : (B) Twice the distance between the zero of graduation and the foot of the staff
Description : The ground surface slopes 1 in 50 along a proposed railway embankment 150 m in length. The height of the embankment at zero chainage is 0.5 m, the width is 11 m and side slopes 2:1. If the falling gradient ... calculated by Prismoidal formula, is (A) 3250 m3 (B) 3225 m3 (C) 3275 m3 (D) 3300 m3
Last Answer : (B) 3225 m3
Description : If the formation level of a highway has a uniform gradient for a particular length, and the ground is also having a longitudinal slope, the earthwork may be calculated by (A) Mid-section formula (B) Trapezoidal formula (C) Prismoidal formula (D) All the above
Description : A dumpy level was set up at the midpoint between two pegs A and B, 50 m apart and the staff readings at and were 1.22 and 1.06. With the level set up at , the readings at and were 1.55 and ... upwards (B) 0.04 m inclined downwards (C) 0.04 m inclined upward (D) None of these
Last Answer : (B) 0.04 m inclined downwards
Description : Pick up the correct statement from the following: (A) An observation or the resulting reading with the level on a levelling staff is called sight (B) A back sight is the first sight taken after setting up ... position (C) The first sight on each change point is a fore sight (D) All the above
Description : A level when set up 25 m from peg A and 50 m from peg B reads 2.847 on a staff held on A and 3.462 on a staff held on B, keeping bubble at its centre while reading. If the reduced levels of A and B are 283.665 m ... collimation error per 100 m is (A) 0.015 m (B) 0.030 m (C) 0.045 m (D) 0.060 m
Last Answer : (D) 0.060 m
Description : In a telescope the object glass of focal length 14 cm, is located at 20 cm from the diaphragm. The focussing lens is midway between them when a staff 16.50 m away is focussed. The focal length of the focussing lens, is (A) 5.24 cm (B) 6.24 cm (C) 7.24 cm (D) 8.24 cm
Last Answer : (C) 7.24 cm
Description : There are two hinged semicircular arches A, B and C of radii 5 m, 7.5 m and 10 m respectively and each carries a concentrated load W at their crowns. The horizontal thrust at their supports will be in the ratio of (A) 1 ... (B) 2 : 1½ : 1 (C) 1 : 1 : 2 (D) None of these
Last Answer : (C) 1 : 1 : 2
Description : For a clay slope of height of 10 m, the stability number is 0.05, = 2.0 t/m3 , C = 2.5 t/m2 , the critical height of the slope of the soil, is (A) 4.0 m (B) 12.5 m (C) 25.0 m (D) 15.0 m
Last Answer : (C) 25.0 m
Description : If the original scale of a negative is 1 : 10,000, the ground resolution, considering that we get nearly 20 lines pair per mm, will be : (a) 50 mm (b) 20 cm (c) 2 m (d) 25 cm
Last Answer : (d) 25 cm
Description : The best compromise between the increase of the length of a highway and reduction in its load carrying capacity, is the ruling gradient (A) 1 in 10 (B) 1 in 15 (C) 1 in 20 (D) 1 in 25
Last Answer : Answer: Option C
Description : If the viscosity of ground water is 1.00, the Slitcher's constant is 400, the effective size of soil particles in aquifer is 0.5 mm and hydraulic gradient is 1 in 80, the velocity of flow is (A) 0.25 m/day (B) 0.50 m/day (C) 1.00 m/day (D) 1.25 m/day
Last Answer : Answer: Option D
Description : The ratio of various ingredients (cement, sand, aggregates) in concrete of grade M 200, is (A) 1 : 2 : 4 (B) 1 : 3 : 6 (C) 1 : 1½ : 3 (D) 1 : 1 : 2
Last Answer : (C) 1 : 1½ : 3
Description : The seepage exit gradient in a soil is the ratio of A) Total head to the length of seepage (B) Flow line to slope (C) Head upstream to that at downstream (D) Head loss to the length of the seepage
Description : The reduced levels of the string at the consecutive sight rails A and B are 203.575 m, 203.475 m respectively. If the difference of their R.D.s is 10 m, the gradient of the sewer line is A. 1 in 100 upward B. 1 in 500 upward C. 1 in 100 downward D. 1 in 503 upward
Last Answer : ANS: C
Description : Non-passing sight distance along a road is the longest distance at which the driver of a moving vehicle, may see an obstacle on the pavement (A) 10 cm high (B) 25 cm high (C) 50 cm high (D) 100 cm high
Last Answer : Answer: Option A
Description : While calculating the overtaking sight distance, the height of the object above road surface, is assumed (A) 50 cm (B) 75 cm (C) 100 cm (D) 120 cm
Description : The raft slab is projected beyond the outer walls of the structure by (A) 5 to 10 cm (B) 15 to 20 cm (C) 25 to 30 cm (D) 30 to 45 cm
Description : In levelling operation (A) When the instrument is being shifted, the staff must not be moved (B) When the staff is being carried forward, the instrument must remain stationary (C) Both (a) and (b) (D) Neither (a) nor (b)
Last Answer : (C) Both (a) and (b)
Description : Design of horizontal and vertical alignments, super-elevation, sight distance and grades, is worst affected by (A) Width of the vehicle (B) Length of the vehicle (C) Height of the vehicle (D) Speed of the vehicle
Description : During levelling if back sight is more than foresight (A) The forward staff is at lower point (B) The back staff is at lower point (C) The difference in level, cannot be ascertained (D) None of these
Last Answer : (B) The back staff is at lower point
Description : Pick up the correct statement from the following: (A) The lines of sight while observing back sight and fore sight lie in the same horizontal plane (B) The staff readings are measurements made ... readings are taken, coincides with the level surface through the telescope axis (D) All the above
Description : The height of a water column equivalent to a pressure of 0.15 MPa is (A) 15.3 m (B) 25.3 m (C) 35.3 m (D) 45.3 m
Last Answer : The height of a water column equivalent to a pressure of 0.15 MPa can be calculated using the hydrostatic equation: Pressure (P) = Density of water (rho) * Acceleration due to gravity (g) * Height (h) ... s^2) = 0.15 m Therefore, the height of the water column would be approximately 0.15 meters.
Description : If a ‘vertical aerial photograph’, (20 cm x 20 cm) in size, on a R.F.I: 10,000, has 60% longitudinal overlap and 40% side overlap, the actual ground length covered by each photograph in the longitudinal direction of the flight will be : (a) 4 km (b) 6 km (c) 0.8 km (d) 0.4 km
Last Answer : .8
Description : Define i) Back Sight Reading ii) Height of instrument
Last Answer : i) Back Sight Reading: This is the first staff reading taken in any set up of the instrument after leveling has been perfectly done. This reading is always taken on a point of known RL i.e on bench mark ... by adding the BS reading to the RL of the BM or CP on which the staff reading was taken.
Description : Define the following: (i) Height of instrument (i) Back sight (iii) Fore sight (iv) Axis of bubble tube
Last Answer : i. Height of instrument: It is the reduced level of line of collimation when the leveling instrument is properly leveled. It is obtained by adding the BS reading to RL of bench mark or change point on which the ... when the bubble is at the center of its run i.e. at middle point of the tube.
Description : The dimensions of a 35 litre forma for measuring aggregates by volume, are: (A) length 30 cm, breadth 25 cm, height 30 cm (B) length 39 cm, breadth 25 cm, height 32 cm (C) length 27 cm, breadth 27 cm, height 48 cm (D) length 220 cm, breadth 25 cm, height 40 cm
Description : The intercept of a staff (A) Is maximum if the staff is held truly normal to the line of sight (B) Is minimum if the staff is held truly normal to the line of sight (C) Decreases if the staff is tilted away from normal (D) Increases if the staff is tilted towards normal
Last Answer : (B) Is minimum if the staff is held truly normal to the line of sight
Description : A flag staff 17.5 m high casts a shadow of length 40.25m. What will be the height of a building, which casts a shadow of length 28.75m under similar conditions? a) 14m b) 11.4m c) 13.5m d) 12.5 m
Last Answer : d) 12.5 m
Description : A reinforced concrete cantilever beam is 3.6 m long, 25 cm wide and has its lever arm 40 cm. It carries a load of 1200 kg at its free end and vertical stirrups can carry 1800 kg. Assuming concrete to carry one- ... beam, the number of shear stirrups required, is (A) 30 (B) 35 (C) 40 (D) 45
Description : An R.C.C beam of 25 cm width has a clear span of 5 metres and carries a U.D.L. of 2000 kg/m inclusive of its self weight. If the lever arm of the section is 45 cm., the beam is ( ... shear (B) Is safe with stirrups (C) Is safe with stirrups and inclined members (D) Needs revision of the section
Description : On the recommendations of Indian Road Congress, the ruling gradient in plains, is (A) 1 in 15 (B) 1 in 20 (C) 1 in 30 (D) 1 in 45
Description : A portion of an embankment having a uniform up-gradient 1 in 500 is circular with radius 1000 m of the centre line. It subtends 180° at the centre. If the height of the bank is 1 m at the lower end, and side slopes 2 ... earth work involved. (A) 26,000 m3 (B) 26,500 m3 (C) 27,000 m3 (D) 27,500 m
Last Answer : (D) 27,500 m3
Description : Pick up the correct statement from the following: (A) Box sextant is used for the measurement of horizontal angles (B) Cross staff is used for setting out right angles (C) Gradiometer is used for setting out any required gradient (D) All the above
Description : Potentiometer wire of length `1 m` is connected in series with `490 Omega` resistance and `2 V` battery. If `0.2 mV/cm` is the potential gradient, the
Last Answer : Potentiometer wire of length `1 m` is connected in series with `490 Omega` resistance and `2 V` battery. If ... 7.9Omega` C. `5.9Omega` D. `6.9Omega`
Description : If the effective length of a 32 cm diameter R.C.C. column is 4.40 m, its slenderness ratio, is (A) 40 (B) 45 (C) 50 (D) 55
Description : Reduction of load capacity in a ruling gradient of (A) 1 in 10, is 10% (B) 1 in 15, is 15% (C) 1 in 20, is 10% (D) 1 in 25, is 25%
Description : Pickup the incorrect statement from the following: (A) The invert of pressure conduit is independent of the grade of the hydraulic gradient line (B) The pressure conduits may be taken uphill ... m (C) Aqueducts and tunnels sections are generally kept circular (D) None of these
Last Answer : (D) None of these
Description : Cross-staff is used for (A) Setting out right angles (B) Measuring contour gradient (C) Taking levels (D) Measuring distances
Last Answer : (A) Setting out right angles
Description : If is the difference in level between end points separated by , then the slope correction is [(h²/2l) + (h 4 /8l3 )]. The second term may be neglected if the value of in a 20 m distance is less than (A) ½ m (B) 1 m (C) 2 m (D) 3 m
Last Answer : (D) 3 m
Description : The ratio of circumferential stress to the longitudinal stress in the walls of a cylindrical shell, due to flowing liquid, is (A) ½ (B) 1 (C) 1½ (D) 2
Last Answer : (D) 2
Description : For the construction of R.C.C. slabs, columns, beams, walls, etc. the grade of concrete mix used, is (A) 1 : 3 : 6 (B) 1 : 1½ : 3 (C) 1 : 2 : 4 (D) 1 : 1 : 2
Last Answer : (C) 1 : 2 : 4
Description : For the construction of the retaining structures, the type of concrete mix to be used, is (A) 1 : 3 : 6 (B) 1 : 2 : 4 (C) 1 : 1½ : 3 (D) 1 : 4 : 8
Description : R.L. of floor at a building is 74.4 m, staff reading on the floor is 1.625 and staff reading when it is held inverted with bottom touching the ceiling of a hall is 2.870; then the height of the ceiling above the floor is (a) 3.593 m (b) 3.953 m (c) 4.495 m (d) 4. 594 m
Last Answer : (c) 4.495 m
Description : At what height must top rails be fitted above working platform? a. Between 90 cm (35 inches) and 110 cm (43 inches) b. Between 100 cm (39 inches) and 120 cm (47 inches) c. Between 95 cm (38 inches) and 115 cm ( 45 inches) d. Between 105 cm (41 inches)and 125 cm (49 inches)
Last Answer : c. Between 95 cm (38 inches) and 115 cm ( 45 inches)
Description : If is the difference in height between end points of a chain of length , the required slope correction is (A) h²/2l (B) h/2l (C) h²/l (D) 2h²/2l
Last Answer : (A) h²/2l