MCQOPTIONS
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MCQOPTIONS
This section includes 492 Mcqs, each offering curated multiple-choice questions to sharpen your Civil Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 251. |
The angle between the prolongation of the preceding line and the forward line of a traverse is called |
| A. | eflection angle |
| B. | ncluded angle |
| C. | irect angle |
| D. | one of the above |
| Answer» B. ncluded angle | |
| 252. |
For a well-conditioned triangle, no angle should be less than |
| A. | 0° |
| B. | 0° |
| C. | 5° |
| D. | 0° |
| Answer» C. 5° | |
| 253. |
If the lower clamp screw is tightened and upper clamp screw is loosened, the theodolite may be rotated |
| A. | n its outer spindle with a relative motion between the vernier and graduated scale of lower plate |
| B. | n its outer spindle without a relative motion between the vernier and gra-duated scale of lower plate |
| C. | n its inner spindle with a relative motion between the vernier and the graduated scale of lower plate |
| D. | n its inner spindle without a relative motion between the vernier and the graduated scale of lower plate |
| Answer» D. n its inner spindle without a relative motion between the vernier and the graduated scale of lower plate | |
| 254. |
The process of determining the locations of the instrument station by drawing re sectors from the locations of the known stations is called |
| A. | adiation |
| B. | ntersection |
| C. | esection |
| D. | raversing |
| Answer» D. raversing | |
| 255. |
Cross staff is an instrument used for |
| A. | easuring approximate horizontal angles |
| B. | etting out right angles |
| C. | easuring bearings of the lines |
| D. | one of the above |
| Answer» C. easuring bearings of the lines | |
| 256. |
During chaining along a straight line, the . leader of the party has 4 arrows in his hand while the follower has 6. Distance of the follower from the starting point is |
| A. | chains |
| B. | chains |
| C. | 20 m |
| D. | 80m |
| Answer» C. 20 m | |
| 257. |
In a tropical year, the numbers of sidereal days are |
| A. | 65 |
| B. | 65.2224 |
| C. | 65.2422 |
| D. | 66.2422 |
| Answer» E. | |
| 258. |
For accurate work, the steel band should always be used in preference to chain because the steel band |
| A. | s lighter than chain |
| B. | s easier to handle |
| C. | s practically inextensible and is not liable to kinks when in use |
| D. | an be easily repaired in the field |
| Answer» D. an be easily repaired in the field | |
| 259. |
After fixing the plane table to the tripod, the main operations which are needed at each plane table station are(i) Levelling(ii) Orientation(iii) CenteringThe correct sequence of these operations is |
| A. | i), (ii), (iii) |
| B. | i), (iii), (ii) |
| C. | iii), (i), (ii) |
| D. | ii), (iii), (i) |
| Answer» C. iii), (i), (ii) | |
| 260. |
Normal tension is that pull which |
| A. | s used at the time of standardising the tape |
| B. | eutralizes the effect due to pull and sag |
| C. | akes the correction due to sag equal to zero |
| D. | akes the correction due to pull equal to zero |
| Answer» C. akes the correction due to sag equal to zero | |
| 261. |
If θ and δ be the latitude of a place and declination of a star respectively, the upper culmination of the star will be north of zenith if its zenith distance, is |
| A. | - θ |
| B. | - δ |
| C. | + δ |
| D. | θ + δ)/2 |
| Answer» B. - δ | |
| 262. |
In triangulation surveys |
| A. | he area is divided into triangular figures |
| B. | ontrol stations are located from which detailed surveys are carried out |
| C. | ides are not measured excepting the base line |
| D. | ll the above |
| Answer» E. | |
| 263. |
The maximum error in radial line assumption, is |
| A. | /H f tan θ |
| B. | /H f² tan θ |
| C. | /H f² sin θ |
| D. | /H f cos θ |
| Answer» B. /H f² tan θ | |
| 264. |
The altitudes of a circumpolar star at culminations are 70° and 10°, both culminations being north of zenith. The declination of the star, is |
| A. | 0° |
| B. | 0° |
| C. | 0° |
| D. | 0° |
| Answer» D. 0° | |
| 265. |
In the quadrantal bearing system, a whole circle bearing of 293° 30′ can be expressed as |
| A. | 23°30’N |
| B. | 66°30’W |
| C. | 113°30’N |
| D. | 23°30’W |
| Answer» C. 113°30’N | |
| 266. |
The maximum tolerance in a 20 m chain is |
| A. | 2 mm |
| B. | 3 mm |
| C. | 5 mm |
| D. | 8 mm |
| Answer» D. 8 mm | |
| 267. |
If v, t and f/H are the ground speed of the aircraft, the shutter speed of the camera and the scale of the photograph respectively, then the amount of image displacement |
| A. | = v. t. H/f |
| B. | = v. f/t. H |
| C. | = v. t. (f/H) |
| D. | = t. H/v. f |
| Answer» D. = t. H/v. f | |
| 268. |
The latitude (λ) of a place and the altitude (α) of the pole are related by |
| A. | = α |
| B. | = 90° - α |
| C. | = α - 90° |
| D. | = 180° - α |
| Answer» B. = 90° - α | |
| 269. |
If α, H, A and δ be the altitude, hour angle, azimuth and declination of a circumpolar star at its elongation, in latitude λ, the following relation holds good |
| A. | os H = tan λ/tan δ |
| B. | in α = sin λ/sin δ |
| C. | in A = cos δ/cos λ |
| D. | ll the above |
| Answer» E. | |
| 270. |
The angle of intersection of the two plane mirrors of an optical square is |
| A. | 0° |
| B. | 5° |
| C. | 0° |
| D. | 0° |
| Answer» C. 0° | |
| 271. |
If α is the observed altitude, the refraction correction in seconds, is |
| A. | 8" cot α |
| B. | 8" tan α |
| C. | 8 sin α |
| D. | 8 cos α |
| Answer» B. 8" tan α | |
| 272. |
The necessary geometrical condition for triangulation adjustment is: |
| A. | he sum of the angles around a station should be 360° |
| B. | he sum of the three angles of a plane triangle should be 180° |
| C. | he sum of the eight angles of a braced quadrilateral should be 360° |
| D. | ll the above |
| Answer» E. | |
| 273. |
The following points form a pair of homologous points: |
| A. | hoto principal point and ground principal point |
| B. | hoto isocenter and ground isocenter |
| C. | hoto plumb point and ground plumb point |
| D. | ll the above |
| Answer» E. | |
| 274. |
If the distance between the projectors is altered by a movement along X-axis of one projector, |
| A. | he length of the air base is increased |
| B. | he scale of the model is altered |
| C. | -parallax is not affected |
| D. | ll the above |
| Answer» E. | |
| 275. |
Assuming human normal vision distance 25 cm, smallest measurable angle 20", and intraocular distance 6.5 cm, the smallest depth to be discerned is |
| A. | .1 mm |
| B. | .5 mm |
| C. | .00 mm |
| D. | .1 mm |
| Answer» B. .5 mm | |
| 276. |
The difference between a level line and a horizontal line is that |
| A. | evel line is a curved line while hori-zontal line is a straight line |
| B. | evel line is normal to plumb line while horizontal line may not be normal to plumb line at the tangent point to level line |
| C. | orizontal line is normal to plumb line while level line may not be normal to the plumb line |
| D. | oth are same |
| Answer» B. evel line is normal to plumb line while horizontal line may not be normal to plumb line at the tangent point to level line | |
| 277. |
Which of the following methods of offsets involves less measurement on the ground? |
| A. | ethod of perpendicular offsets |
| B. | ethod of oblique offsets |
| C. | ethod of ties |
| D. | ll involve equal measurement on the ground |
| Answer» B. ethod of oblique offsets | |
| 278. |
If θ and δ be the latitude of an observer and declination of a heavenly body respectively, the upper culmination of the body will be south of zenith if its zenith distance, is |
| A. | - θ |
| B. | - δ |
| C. | + δ |
| D. | (θ - δ) |
| Answer» C. + δ | |
| 279. |
The longitudes of two places at latitude 60° N are 93° E and 97° W. Their departure is |
| A. | 100 nautical miles |
| B. | 700 nautical miles |
| C. | 20 nautical miles |
| D. | 00 nautical miles |
| Answer» C. 20 nautical miles | |
| 280. |
The methods used for locating the plane table stations arei) radiationii) traversingiii) intersectioniv) resectionThe correct answer is |
| A. | i) and (ii) |
| B. | iii) and (iv) |
| C. | ii) and (iv) |
| D. | i) and (iii) |
| Answer» D. i) and (iii) | |
| 281. |
A lemniscate curve between the tangents will be transitional throughout if the polar deflection angle of its apex, is |
| A. | /2 |
| B. | /3 |
| C. | /4 |
| D. | /6 |
| Answer» E. | |
| 282. |
The hour angle of the heavenly body for Greenwich meridian equals the hour angle of the body for any other meridian + longitude: |
| A. | ean sun |
| B. | rue sun |
| C. | ernal equinox |
| D. | ll the above |
| Answer» E. | |
| 283. |
The length of a parallel of λ latitude between two meridians is equal to difference in longitudes multiplied by |
| A. | in λ |
| B. | os λ |
| C. | an λ |
| D. | ot λ |
| Answer» C. an λ | |
| 284. |
When a star is between the pole and the horizon, the relationship between latitude (λ), zenith distance (z) and declination δ, is |
| A. | = z + δ |
| B. | = δ - z |
| C. | = 180° - (z + δ) |
| D. | = (z + δ) - 180° |
| Answer» D. = (z + δ) - 180° | |
| 285. |
The method of surveying by triangulation was first introduced by the Dutchman Snell in |
| A. | 600 |
| B. | 615 |
| C. | 630 |
| D. | 650 |
| Answer» C. 630 | |
| 286. |
α and β are the angles subtended by a point of elevation h at their air station with respective plumb points. Photo scale and focal length of the lens being ‘S’ and ‘f’ respectively. Parallax displacement of the point due to relief, is |
| A. | tan α/S |
| B. | tan β/S |
| C. | (tan α + tan β)/S |
| D. | (tan α - tan β)/S |
| Answer» D. (tan α - tan β)/S | |
| 287. |
In the cross-section method of indirect contouring, the spacing of cross-sections depends uponi) contour intervalii) scale of planiii) characteristics of groundThe correct answer is |
| A. | nly (i) |
| B. | i) and (ii) |
| C. | ii) and (iii) |
| D. | i), (ii) and (iii) |
| Answer» E. | |
| 288. |
If altitude bubble is provided both on index frame as well as on telescope of a theodolite, then the instrument is levelled with reference toi) altitude bubble on index frameii) altitude bubble on index frame if it is to be used as a leveliii) altitude bubble on telescopeiv) altitude bubble on telescope if it is to be used as a level The correct answer is |
| A. | nly (i) |
| B. | oth (i) and (iv) |
| C. | nly (iii) |
| D. | oth (ii) and (iii) |
| Answer» C. nly (iii) | |
| 289. |
The scale of a vertical photograph of focal length ‘f’ taken from height of ‘H’ metres above M.S.L., at a point of reduced level ‘h’, is |
| A. | /H |
| B. | /(H + h) |
| C. | /(H - h) |
| D. | H - h)/f |
| Answer» D. H - h)/f | |
| 290. |
Which of the following methods of plane table surveying is used to locate the position of an inaccessible point ? |
| A. | adiation |
| B. | ntersection |
| C. | raversing |
| D. | esection |
| Answer» C. raversing | |
| 291. |
A metallic tape is made of |
| A. | teel |
| B. | nvar |
| C. | inen |
| D. | loth and wires |
| Answer» E. | |
| 292. |
Which of the following errors can be neutralised by setting the level midway between the two stations ? |
| A. | rror due to curvature only |
| B. | rror due to refraction only |
| C. | rror due to both curvature and re-fraction |
| D. | one of the above |
| Answer» D. one of the above | |
| 293. |
‘H’ is the flying height above mean ground level and ‘f’ is the principal distance of a vertical photograph. The mean scale of the photographs is |
| A. | . f |
| B. | /f |
| C. | /H |
| D. | + f |
| Answer» D. + f | |
| 294. |
The scale of a tilted photograph of focal length f, taken from an altitude H, along the plate parallel through plumb point, is |
| A. | /H sec θ |
| B. | sec θ/H |
| C. | /H |
| D. | /H cos ½θ |
| Answer» C. /H | |
| 295. |
If ‘δ’ is the declination of the Polaris and ‘λ’ is the latitude of the place, the azimuth of the Polaris, is |
| A. | os δ/cos λ |
| B. | os (90° - δ)/cos (90° - λ) |
| C. | in (90° - δ)/sin (90° - λ) |
| D. | an (90° + δ)/tan (90° + λ) |
| Answer» B. os (90° - δ)/cos (90° - λ) | |
| 296. |
Which of the following errors is not eliminated by the method of repetition of horizontal angle measurement ? |
| A. | rror due to eccentricity of verniers |
| B. | rror due to displacement of station signals |
| C. | rror due to wrong adjustment of line of collimation and trunnion axis |
| D. | rror due to inaccurate graduation |
| Answer» C. rror due to wrong adjustment of line of collimation and trunnion axis | |
| 297. |
Pick up the incorrect statement from the following. The angular distance of heavenly bodies on observer's meridian measured from the pole, is |
| A. | o-declination |
| B. | o-altitude |
| C. | o-latitude |
| D. | olar distance |
| Answer» B. o-altitude | |
| 298. |
If the staff is not held vertical at a level¬ling station, the reduced level calculated from the observation would be |
| A. | rue R.L. |
| B. | ore than true R.L. |
| C. | ess than true R.L. |
| D. | one of the above |
| Answer» D. one of the above | |
| 299. |
The latitude of the observer's position, is |
| A. | levation of the elevated pole |
| B. | eclination of the observer's zenith |
| C. | ngular distance along the observer's meridian between equator and the observer |
| D. | ll the above |
| Answer» E. | |
| 300. |
A negative declination shows that the magnetic meridian is to the |
| A. | astern side of the true meridian |
| B. | estern side of the true meridian |
| C. | outhern side of the true meridian |
| D. | one of the above |
| Answer» C. outhern side of the true meridian | |