  ## Surveying MCQ Practice Questions (Civil Engineering) Set 5

##### Which one of the following mistakes/errors may be cumulative + or - :

Options are :

• Sag
• Erroneous length of chain

##### The bubble tube is nearly filled with:

Options are :

• All the above
• A liquid which is very mobile
• A liquid having low freezing point
• Alcohol or chloroform

##### A theodolite is said to be in perfect adjustment if:

Options are :

• Line of collimation sweeps out a vertical plane while the telescope is elevated or depressed
• Rotation axis is vertical to the transit axis
• Transit axis is perpendicular to line of collimation
• All the above

##### In tacheometrical observations, vertical staff holding is generally preferred to normal staffing, due to:

Options are :

• None of these
• Minimum effect of careless holding on the result
• Facility of holding
• Ease of reduction of observations

Answer :Minimum effect of careless holding on the result

##### If L is in kilometres, the curvature correction is:

Options are :

• 58.2 L^(2) mm
• 78.4 L^(2) mm
• 74.8 L^(2) mm
• 64.8 L^(2) mm

##### Magnetic bearing of a survey line at any place:

Options are :

• Varies differently in different months of the year
• Changes systematically
• Is always greater than true bearing
• Remains constant

Answer :Varies differently in different months of the year

Options are :

• 10 m
• 15 m
• 20 m
• 5 m

Options are :

• D
• C
• B
• A

##### Prismatic compass is considered more accurate than a surveyor's compass, because:

Options are :

• It is provided with a better magnetic needle
• Both C and D
• Its graduations are in whole circle bearings
• It is provided with a sliding glass in the object vane
• It is provided with a prism to facilitate reading of its graduated circle

##### A traverse deflection angle is:

Options are :

• The difference between the included angle and 180�
• More than 90� but less than 180�
• The difference between 360� and the included angle
• Less than 90�

Answer :The difference between the included angle and 180�

##### The Random errors tend to accumulate proportionally to:

Options are :

• Cube root of the number of operation involved
• Square root of the number of operation involved
• Reciprocal of operations involved
• Numbers of operations involved

Answer :Square root of the number of operation involved

##### An angle of deflection right, may be directly obtained by setting the instrument to read:

Options are :

• 90�
• Zero on back station
• 270� on back station
• 180� on back station

Options are :

• Resection
• Traversing
• Intersection

Options are :

• C
• A
• D
• B

##### The orthographical projection of a traverse leg upon the reference meridian, is known as:

Options are :

• Bearing of the leg
• Latitude to the leg
• Co-ordinate of the leg
• Departure of leg

##### Which of the following introduces an error of about 1 in 1000 if 20 m chain is used:

Options are :

• One end of chain 0.9 m higher than the other
• All the above
• One end of the chain 0.9 m off the line
• Middle of the chain 0.45 m off the line
• Length of chain 20 mm wrong

Options are :

• A
• D
• B
• C

##### Grid lines are parallel to:

Options are :

• None of these
• Line representing the central true meridian of the grid
• Magnetic meridian of the central point of the grid
• Geographical equator

Answer :Line representing the central true meridian of the grid

##### The direction of steepest slope on a contour, is:

Options are :

• Along the contour
• At right angles to the contour
• None of these
• At an angle of 45� to the contour

Answer :At right angles to the contour

Options are :

• N 20� W
• N 20� E
• N 70� W
• S 70� E

##### The bearing of AB is 190� and that of CB is 260� 30'. The included angle ABC, is:

Options are :

• 99� 30'
• 70� 30'
• 80� 30'
• None of these

##### In an internal focusing telescope:

Options are :

• All the above
• The objective is at a fixed distance from the diaphragm
• The focusing is done by the sliding of a divergent lens
• The focusing divergent lens is situated at about the middle of the tube

##### If a tacheometer is fitted with an anal-latic lens:

Options are :

• Both multiplying and additive constants are 100
• Additive constant is 100, multiplying constant is zero
• Both multiplying and additive constants are 50
• Multiplying constant is 100, additive constant is zero

Options are :

• 180�
• 60�
• 120�
• 45�
• 90�

Options are :

• A
• B
• D
• C

##### The slope correction may be ignored if:

Options are :

• To slope of the ground is say 1 in 19
• None of these
• The slope of the ground is less than 3�

Answer :To slope of the ground is say 1 in 19 The slope of the ground is less than 3�

Options are :

• 15"
• 20"
• 30"
• 10"
• 5"

##### Imaginary line passing through points having equal magnetic declination is termed as:

Options are :

• Isogon
• Isoclinic line
• None of these
• Agonic line

##### In an adjusted level, when the bubble is central, the axis of the bubble tube becomes parallel to:

Options are :

• None of these
• Line of collimation
• Line of sight
• Axis of the telescope

##### The 'fix' of a plane table from three known points, is good, if:

Options are :

• Middle station is farthest
• Middle station is nearest
• Either the right or left station is nearest
• None of these