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MCQOPTIONS
This section includes 301 Mcqs, each offering curated multiple-choice questions to sharpen your Civil Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
For high sensivity of the bubble tube |
| A. | A liquid of low viscosity is used |
| B. | A liquid of low surface tension is used |
| C. | The bubble space should be long |
| D. | All the above |
| Answer» E. | |
| 52. |
Prismatic compass is considered more accurate than a surveyor’s compass, because |
| A. | It is provided with a better magnetic needle |
| B. | It is provided with a sliding glass in the object vane |
| C. | Its graduations are in whole circle bearings |
| D. | It is provided with a prism to facilitate reading of its graduated circle |
| Answer» E. | |
| 53. |
Cross hairs in surveying telescopes, are fitted |
| A. | In the objective glass |
| B. | At the centre of the telescope |
| C. | At the optical centre of the eye piece |
| D. | In front of the eye piece |
| Answer» E. | |
| 54. |
s R, the length of its long chord, is |
| A. | R cos |
| B. | 2R cos |
| C. | R sin |
| D. | 2R sin |
| Answer» E. | |
| 55. |
Greater accuracy in linear measurements, is obtained by |
| A. | Tacheometry |
| B. | Direct chaining |
| C. | Direct taping |
| D. | All the above |
| Answer» D. All the above | |
| 56. |
The best method of interpolation of contours, is by |
| A. | Estimation |
| B. | Graphical means |
| C. | Computation |
| D. | All of these |
| Answer» D. All of these | |
| 57. |
The additional lines which are measured to show the correctness of the chain surveying are called |
| A. | Check clines |
| B. | Proof lines |
| C. | Tie lines |
| D. | All of these |
| Answer» E. | |
| 58. |
The chaining on sloping ground is |
| A. | Easier along the falling gradient |
| B. | Easier along the up gradient |
| C. | Equally convenient along falling as well as up gradient |
| D. | All the above |
| Answer» B. Easier along the up gradient | |
| 59. |
Magnetic bearing of a survey line at any place |
| A. | Remains constant |
| B. | Changes systematically |
| C. | Varies differently in different months of the year |
| D. | Is always greater than true bearing |
| Answer» D. Is always greater than true bearing | |
| 60. |
The diaphragm of a stadia theodolite is fitted with two additional |
| A. | Horizontal hairs |
| B. | Vertical hairs |
| C. | Horizontal and two vertical hairs |
| D. | None of these |
| Answer» B. Vertical hairs | |
| 61. |
In precision theodolite traverse if included angles are read twice and the mean reading accepted using both verniers having a least count of 30″. Assuming the instrument to be in perfect adjustment, linear measurements correct to 6 mm per 30 metre tape duly corrected for temperature, slope and sag, the angular error of closure not to exceed (where n is the number of traverse legs) |
| A. | 50″ n |
| B. | 30″ n |
| C. | 60″ n |
| D. | None of these |
| Answer» B. 30″ n | |
| 62. |
If the long chord and tangent length of a circular curve of radius R are equal the angle of deflection, is |
| A. | 30° |
| B. | 60° |
| C. | 90° |
| D. | 120° |
| Answer» E. | |
| 63. |
The apparent error on reversal is |
| A. | Equal to the actual error |
| B. | Twice the actual error |
| C. | Thrice the actual error |
| D. | None of these |
| Answer» C. Thrice the actual error | |
| 64. |
If the rate of gain of radial acceleration is 0.3 m per sec3 and full centrifugal ratio is developed. On the curve the ratio of the length of the transition curve of same radius on road and railway, is |
| A. | 2.828 |
| B. | 3.828 |
| C. | 1.828 |
| D. | 0.828 |
| Answer» B. 3.828 | |
| 65. |
The surface of zero elevation around the earth, which is slightly irregular and curved, is known as |
| A. | Mean sea level |
| B. | Geoid surface |
| C. | Level surface |
| D. | Horizontal surface |
| Answer» C. Level surface | |
| 66. |
The rise and fall method of reduction of levels, provides a check on |
| A. | Back sights |
| B. | Fore sights |
| C. | Intermediate sights |
| D. | All of these |
| Answer» E. | |
| 67. |
The main principle of surveying is to work |
| A. | From part to the whole |
| B. | From whole to the part |
| C. | From higher level to the lower level |
| D. | From lower level to higher level |
| Answer» C. From higher level to the lower level | |
| 68. |
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 |
| Answer» D. 8.24 cm | |
| 69. |
Probable accidental error in precise levelling as recommended by International Geodetic Association should not exceed (where k is in kilometers.) |
| A. | ± 0.1 k mm |
| B. | ± 0.5 k mm |
| C. | ± 1 k mm |
| D. | ± 5 k mm |
| Answer» D. ± 5 k mm | |
| 70. |
For orientation of a plane table with three points A, B and C, Bessel’s drill is |
| A. | Align B through A and draw a ray towards C, align A through B and draw A ray towards C, finally align C through the point of intersection of the previously drawn rays |
| B. | Align C through A and draw a ray towards B, align A through C and draw A ray towards B, finally align B through the point of intersection of the previously drawn rays |
| C. | Align c through B and draw a ray towards A, align B through C and draw A ray towards A, finally align A, through the point of intersection of the previously, drawn rays |
| D. | In the first two steps any two of the points may be used and a ray drawn towards the third point, which is sighted through the point of intersection of previously drawn rays in the final step. |
| Answer» E. | |
| 71. |
Pick up the method of surveying in which field observations and plotting proceed simultaneously from the following |
| A. | Chain surveying |
| B. | Compass surveying |
| C. | Plan table surveying |
| D. | Tacheometric surveying |
| Answer» D. Tacheometric surveying | |
| 72. |
A lens or combination of lenses in which the following defect is completely eliminated is called aplanatic |
| A. | Spherical aberration |
| B. | Chromatic aberration |
| C. | Coma |
| D. | Astigmatism |
| Answer» B. Chromatic aberration | |
| 73. |
In chain surveying, perpendiculars to the chain line are set out by |
| A. | A theodolite |
| B. | A prismatic compass |
| C. | A level |
| D. | An optical square |
| Answer» E. | |
| 74. |
A theodolite is said to be in perfect adjustment if |
| A. | Rotation axis is vertical to the transit axis |
| B. | Transit axis is perpendicular to line of collimation |
| C. | Line of collimation sweeps out a vertical plane while the telescope is elevated or depressed |
| D. | All the above |
| Answer» E. | |
| 75. |
Diopter is the power of a lens having a focal length of |
| A. | 25 cm |
| B. | 50 cm |
| C. | 75 cm |
| D. | 100 cm |
| Answer» E. | |
| 76. |
Contours of different elevations may cross each other only in the case of |
| A. | An overhanging cliff |
| B. | A vertical cliff |
| C. | A saddle |
| D. | An inclined plane |
| Answer» B. A vertical cliff | |
| 77. |
While measuring the distance between two points along upgrade with the help of a 20 m chain, the forward end of the chain is shifted forward through a distance |
| A. | 20 (sin – 1) |
| B. | 20 (cos – 1) |
| C. | 20 (sec – 1) |
| D. | 20 (cosec – 1) |
| Answer» D. 20 (cosec – 1) | |
| 78. |
In a constant level tube, size of the bubble remains constant because upper wall is |
| A. | Of relatively larger radius |
| B. | Of relatively smaller radius |
| C. | Flat |
| D. | Convex downwards |
| Answer» B. Of relatively smaller radius | |
| 79. |
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 |
| Answer» C. Decreases if the staff is tilted away from normal | |
| 80. |
The approximate formula for radial or perpendicular offsets from the tangent, is |
| A. | x/2R |
| B. | x²/2R |
| C. | x/R |
| D. | x²/R |
| Answer» C. x/R | |
| 81. |
The power of a lens |
| A. | Is reciprocal of its focal length |
| B. | Is positive if it is a convex lens |
| C. | Is negative if it is a concave lens |
| D. | Is measured in Diopter |
| Answer» E. | |
| 82. |
A relatively fixed point of known elevation above datum, is called |
| A. | Bench mark |
| B. | Datum point |
| C. | Reduced level |
| D. | Reference point |
| Answer» B. Datum point | |
| 83. |
R, the distance between the mid-point of the curve and long chord, is |
| A. | R (1 – |
| B. | R |
| C. | R |
| D. | R (1 – |
| Answer» E. | |
| 84. |
Bergschrund is a topographical feature in |
| A. | Plains |
| B. | Water bodies |
| C. | Hills |
| D. | Glaciated region |
| Answer» C. Hills | |
| 85. |
The magnetic meridian at any point, is the direction indicated by a freely suspended |
| A. | Magnetic needle |
| B. | And properly balanced magnetic needle |
| C. | Properly balanced and uninfluenced by local attractive force |
| D. | Magnetic needle over an iron pivot |
| Answer» D. Magnetic needle over an iron pivot | |
| 86. |
the error over the whole length of the traverse of lines of length is |
| A. | l n |
| B. | n |
| C. | n |
| D. | n |
| Answer» B. n | |
| 87. |
The bearings of two traverse legs AB and BC are N52° 45′ E and N34° 30′ E respectively. The deflection angle is |
| A. | 18° 15′ E |
| B. | 18° 15′ N |
| C. | 18° 15′ W |
| D. | 18° 15′ L |
| Answer» E. | |
| 88. |
Two hill tops and 20 km apart are intervened by a third top . If the top most contour of the three hill tops are of the same value, state whether the line of sight AB |
| A. | Passes clear of hill top C |
| B. | Passes below the hill top C |
| C. | Grazes the hill top C |
| D. | None of these |
| Answer» C. Grazes the hill top C | |
| 89. |
A transit is oriented by setting its vernier A to read the back azimuth of the preceding line. A back sight on the preceding transit station taken and transit is rotated about its vertical axis. The vernier A reads |
| A. | Azimuth of the forward line |
| B. | Bearing of the forward line |
| C. | Back bearing of the forward line |
| D. | Equal to 360°-azimuth of the forward line |
| Answer» B. Bearing of the forward line | |
| 90. |
A dumpy level was set up at mid-point between pegs A and B, 80 m apart and the staff readings were 1.32 and 1.56. When the level was set up at a point 10 m from A on BA produced, the staff readings obtained at A and B were 1.11 and 1.39. The correct staff reading from this set up at S should be |
| A. | 1.435 |
| B. | 1.345 |
| C. | 1.425 |
| D. | None of these |
| Answer» C. 1.425 | |
| 91. |
Systematic errors are those errors |
| A. | Which cannot be recognised |
| B. | Whose character is understood |
| C. | Whose effects are cumulative and can be eliminated |
| D. | None of these |
| Answer» D. None of these | |
| 92. |
A uniform slope was measured by the method of stepping. If the difference in level between two points is 1.8 m and the slope distance between them is 15 m, the error is approximately equal to |
| A. | Cumulative, + 0.11 m |
| B. | Compensating, ± 0.11 m |
| C. | Cumulative, – 0.11 m |
| D. | None of these |
| Answer» B. Compensating, ± 0.11 m | |
| 93. |
The defect of a lens whereby rays of white light proceeding from a point get dispersed into their components and conveyed to various foci, forming a blurred and coloured image is known as |
| A. | Chromatic aberration |
| B. | Spherical aberration |
| C. | Astigmatism |
| D. | Coma |
| Answer» B. Spherical aberration | |
| 94. |
The distances AC and BC are measured from two fixed points A and B whose distance AB is known. The point C is plotted by intersection. This method is generally adopted in |
| A. | Chain surveying |
| B. | Traverse method of surveys |
| C. | Triangulation |
| D. | None of these |
| Answer» B. Traverse method of surveys | |
| 95. |
The orthographical projection of a traverse leg upon the reference meridian, is known as |
| A. | Departure of leg |
| B. | Latitude to the leg |
| C. | Co-ordinate of the leg |
| D. | Bearing of the leg |
| Answer» C. Co-ordinate of the leg | |
| 96. |
The sensitiveness of a level tube decreases if |
| A. | Radius of curvature of its inner surface is increased |
| B. | Diameter of the tube is increased |
| C. | Length of the vapour bubble is increased |
| D. | Both viscosity and surface tension are increased |
| Answer» E. | |
| 97. |
The 10 mm markings on a levelling staff placed at 20 m are separated by |
| A. | 1/1000 radian |
| B. | 1/1500 radian |
| C. | 1/2000 radian |
| D. | 1/2500 radian |
| Answer» D. 1/2500 radian | |
| 98. |
The boundary of water of a still lake represents |
| A. | Level surface |
| B. | Horizontal surface |
| C. | Contour line |
| D. | A concave surface |
| Answer» D. A concave surface | |
| 99. |
The distance between steps for measuring downhill to obtain better accuracy |
| A. | Decreases with decrease of slope |
| B. | Increases with increase of slope |
| C. | Decreases with increase of slope |
| D. | Decreases with decrease of weight of the chain |
| Answer» D. Decreases with decrease of weight of the chain | |
| 100. |
The most reliable method of plotting a theodolite traverse, is |
| A. | By consecutive co-ordinates of each station |
| B. | By independent co-ordinates of each station |
| C. | By plotting included angles and scaling off each traverse leg |
| D. | By the tangent method of plotting |
| Answer» C. By plotting included angles and scaling off each traverse leg | |