358 + Mcqs in Surveying Telescope Page 3 McqOptions

101.	An imaginary line lying throughout on the surface of the earth and preserving a constant inclination to the horizontal, is called
A.	contour line
B.	contour gradient
C.	level line
D.	line of gentle scope.
Answer» C. level line

Discussion

102.	If the smallest division of a vernier is longer than the smallest division of its primary scale, the vernier is known as
A.	direct vernier
B.	double vernier
C.	retrograde vernier
D.	simple vernier.
Answer» D. simple vernier.

Discussion

103.	Whole circle bearing of a line is preferred to a quadrantal bearing merely because
A.	bearing is not completely specified by an angle
B.	bearing is completely specified by an angle
C.	Sign of the correction of magnetic declination is different in different quadrants
D.	its trigonometrical values may be extracted from ordinary tables easily.
Answer» C. Sign of the correction of magnetic declination is different in different quadrants

Discussion

104.	Bergchrund is a topograhical feature in
A.	plains
B.	water bodies
C.	hills
D.	glaciated region
Answer» C. hills

Discussion

105.	If whole circle bearing of a line is 120°, its reduced bearing is
A.	S 20° E
B.	S 60° E
C.	N 120° E
D.	N 60° E.
Answer» C. N 120° E

Discussion

106.	The bubble tube is nearly filled with
A.	alcohol or chloroform
B.	a liquid which is very mobile
C.	a liquid having low freezing point
D.	all the above.
Answer» E.

Discussion

107.	In tacheometrical observations, vertical staff holding is generally preferred to normal staffing, due to
A.	ease of reduction of observations
B.	facility of holding
C.	minimum effect of careless holding on the result
D.	none of these.
Answer» D. none of these.

Discussion

108.	Mistakes which may produce a very serious effect upon the final results arise due to
A.	in attention
B.	in experience
C.	carelessness
D.	all of these.
Answer» E.

Discussion

109.	Which one of the following procedures for getting accurate orientation is the most distinctive feature of the art of plane tabling
A.	radiation
B.	intersection
C.	traversing
D.	resection.
Answer» E.

Discussion

110.	For locating a distant object visible from two transit stations, the method usually preferred to, is
A.	Angles and distances from transit stations
B.	Angles from two transit stations
C.	distance from two transit stations
D.	Angle from one transit station and distance from the other.
Answer» C. distance from two transit stations

Discussion

111.	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.

Discussion

112.	The bearing of AB is 190° and that of CB is 260° 30'. The included angle ABC, is
A.	80° 30'
B.	99° 30'
C.	70° 30'
D.	none of these
Answer» D. none of these

Discussion

113.	The combined effect of curvature and refraction over a distance L kilometres is
A.	67.2 L² mm
B.	76.3 L² mm
C.	64.5 L² mm
D.	none of these.
Answer» B. 76.3 L² mm

Discussion

114.	The slope correction for a 3° slope for a length of 100 m, is
A.	-0.11 m
B.	-0.12 m
C.	-1.87 m
D.	-0.137 m
Answer» E.

Discussion

115.	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.

Discussion

116.	The distance between terminal points computed from a subsidiary traverse run between them, is generally known, as
A.	traverse leg
B.	a base
C.	traverse base
D.	all the above.
Answer» D. all the above.

Discussion

117.	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.

Discussion

118.	While measuring a chain line between two stations A and B intervened by a raised ground
A.	vision gets obstructed
B.	chaining gets obstructed
C.	both vision and chaining get obstructed
D.	all the above.
Answer» B. chaining gets obstructed

Discussion

119.	The imaginary line passing through the intersection of cross hairs and the optical centre of the objective, is known as
A.	line of sight
B.	line of collimation
C.	axis of the telescope
D.	none of these.
Answer» C. axis of the telescope

Discussion

120.	Closed contours of decreasing values towards their centre, represent
A.	a hill
B.	a depression
C.	a saddle or pass
D.	a river bed.
Answer» C. a saddle or pass

Discussion

121.	If L is in kilometres, the curvature correction is
A.	58.2 L² mm
B.	64.8 L² mm
C.	74.8 L2 mm
D.	78.4 L² mm.
Answer» E.

Discussion

122.	Check lines (or proof lines) in Chain Surveying, are essentially required
A.	to plot the chain lines
B.	to plot the offsets
C.	to indicate the accuracy of the survey work
D.	to increase the out-turn
Answer» D. to increase the out-turn

Discussion

123.	A clinometer is used for
A.	measuring angle of slope
B.	correcting line of collimation
C.	setting out right angles
D.	defining natural features.
Answer» B. correcting line of collimation

Discussion

124.	If the whole circle bearing of a line is 180°, its reduced bearing is
A.	S 0° E
B.	S 0° W
C.	S
D.	N.
Answer» D. N.

Discussion

125.	In an adjusted level, when the bubble is central, the axis of the bubble tube becomes parallel to
A.	line of sight
B.	line of collimation
C.	axis of the telescope
D.	None of these.
Answer» B. line of collimation

Discussion

126.	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.

Discussion

127.	Back bearing of a line is equal to
A.	Fore bearing ± 90°
B.	Fore bearing ± 180°
C.	Fore bearing ± 360°
D.	Fore bearing ± 270°
Answer» C. Fore bearing ± 360°

Discussion

128.	A sewer is laid from a manhole A to a manhole B, 250 m away along a gradient of 1 in 125. If the reduced level of the invert at A is 205.75 m and the height of the boning rod is 3 m, the reduced level of the sight rail at B, is
A.	208.75 m
B.	202.75 m
C.	206.75 m
D.	211.75 m
Answer» D. 211.75 m

Discussion

129.	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

Discussion

130.	Locating the position of a plane table station with reference to three known points, is known as
A.	intersection method
B.	radiation method
C.	resection method
D.	three point problem.
Answer» E.

Discussion

131.	The reduced bearing of a line is N 87° W. Its whole circle bearing is
A.	87°
B.	273°
C.	93°
D.	3°
Answer» C. 93°

Discussion

132.	The area of any irregular figure of the plotted map is measured with
A.	pentagraph
B.	sextant
C.	clinometer
D.	planimeter
Answer» E.

Discussion

133.	To orient a plane table at a point with two inaccessible points, the method generally adopted, is
A.	intersection
B.	resection
C.	radiation
D.	two point problem.
Answer» E.

Discussion

134.	The operation of revolving a plane table about its vertical axis so that all lines on the sheet become parallel to corresponding lines on the ground, is known
A.	levelling
B.	centering
C.	orientation
D.	setting.
Answer» D. setting.

Discussion

135.	Perpendicular offset from a tangent to the junction of a transition curve and circular curve is equal to
A.	shift
B.	twice the shift
C.	thrice the shift
D.	four times the shift.
Answer» E.

Discussion

136.	Chain surveying is well adopted for
A.	small areas in open ground
B.	small areas with crowded details
C.	large areas with simple details
D.	large areas with difficult details.
Answer» B. small areas with crowded details

Discussion

137.	The sag of 50 m tape weighing 4 kg under 5 kg tension is roughly
A.	0.043 m
B.	0.053 m
C.	0.063 m
D.	0.083 m
Answer» E.

Discussion

138.	When the bubble of the level tube of a level, remains central
A.	line of sight is horizontal
B.	axis of the telescope is horizontal
C.	line of collimation is horizontal
D.	geometrical axis of the telescope is horizontal.
Answer» B. axis of the telescope is horizontal

Discussion

139.	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.

Discussion

140.	For preparation of a contour plan for a route survey
A.	method of squares is used
B.	method of trace contour is used
C.	method of cross profile is used
D.	indirect method of contouring is used.
Answer» D. indirect method of contouring is used.

Discussion

141.	The sum of the interior angles of a geometrical figure laid on the surface of the earth differs from that of the corresponding plane figure only to the extent of one second for every
A.	100 sq. km of area
B.	150 sq. km of area
C.	200 sq. km of area
D.	none of these.
Answer» D. none of these.

Discussion

142.	Angles to a given pivot station observed from a number of traverse stations when plotted, the lines to the pivot station intersect at a common point
A.	angular measurements are correct and not the linear measurements
B.	linear measurements are correct and not the angular measurements
C.	angular and linear measurements are correct and not the plotting of traverse
D.	angular and linear measurements and also plotting of the traverse are correct.
Answer» E.

Discussion

143.	There are two stations A and B. Which of the following statements is correct :
A.	the fore bearing of AB is AB
B.	the back bearing of AB is BA
C.	the fore and back bearings of AB differ by 180°
D.	all the above.
Answer» E.

Discussion

144.	The co-ordinate of a point measured perpendicular to the parallel, is called
A.	total latitude
B.	meridian distance
C.	total departure
D.	consecutive co-ordinate.
Answer» B. meridian distance

Discussion

145.	Metric chains are generally available in
A.	10 m and 20 m length
B.	15 m and 20 m length
C.	20 m and 30 m length
D.	25 m and 100 m length
Answer» D. 25 m and 100 m length

Discussion

146.	If the length of a chain line along a slope of θ° is l, the required slope correction is
A.	2l cos² θ/2
B.	2l sin² θ/2
C.	l tan² θ/2
D.	l cos² θ/2.
Answer» C. l tan² θ/2

Discussion

147.	The Random errors tend to accumulate proportionally to
A.	numbers of operations involved
B.	reciprocal of operations involved
C.	square root of the number of operation involved
D.	cube root of the number of operation involved.
Answer» D. cube root of the number of operation involved.

Discussion

148.	In an internal focusing telescope
A.	the objective is at a fixed distance from the diaphragm
B.	the focusing is done by the sliding of a divergent lens.
C.	the focusing divergent lens is situated at about the middle of the tube
D.	all the above.
Answer» E.

Discussion

149.	The length of a traverse leg may be obtained by multiplying the latitude and
A.	secant of its reduced bearing
B.	sine of its reduced bearing
C.	cosine of its reduced bearing
D.	tangent of its reduced bearing.
Answer» B. sine of its reduced bearing

Discussion

150.	The total change in level along the line is equal to total back sights
A.	minus total fore sights
B.	the total rises minus total falls
C.	the reduced level of last point minus reduced level of the first point
D.	all the above.
Answer» E.

Discussion

Explore topic-wise MCQs in Surveying.

An imaginary line lying throughout on the surface of the earth and preserving a constant inclination to the horizontal, is called

If the smallest division of a vernier is longer than the smallest division of its primary scale, the vernier is known as

Whole circle bearing of a line is preferred to a quadrantal bearing merely because

Bergchrund is a topograhical feature in

If whole circle bearing of a line is 120°, its reduced bearing is

The bubble tube is nearly filled with

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

Mistakes which may produce a very serious effect upon the final results arise due to

Which one of the following procedures for getting accurate orientation is the most distinctive feature of the art of plane tabling

For locating a distant object visible from two transit stations, the method usually preferred to, is

Magnetic bearing of a survey line at any place

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

The combined effect of curvature and refraction over a distance L kilometres is

The slope correction for a 3° slope for a length of 100 m, is

The best method of interpolation of contours, is by

The distance between terminal points computed from a subsidiary traverse run between them, is generally known, as

Greater accuracy in linear measurements, is obtained by

While measuring a chain line between two stations A and B intervened by a raised ground

The imaginary line passing through the intersection of cross hairs and the optical centre of the objective, is known as

Closed contours of decreasing values towards their centre, represent

If L is in kilometres, the curvature correction is

Check lines (or proof lines) in Chain Surveying, are essentially required

A clinometer is used for

If the whole circle bearing of a line is 180°, its reduced bearing is

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

The magnetic meridian at any point, is the direction indicated by a freely suspended

Back bearing of a line is equal to

A sewer is laid from a manhole A to a manhole B, 250 m away along a gradient of 1 in 125. If the reduced level of the invert at A is 205.75 m and the height of the boning rod is 3 m, the reduced level of the sight rail at B, is

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

Locating the position of a plane table station with reference to three known points, is known as

The reduced bearing of a line is N 87° W. Its whole circle bearing is

The area of any irregular figure of the plotted map is measured with

To orient a plane table at a point with two inaccessible points, the method generally adopted, is

The operation of revolving a plane table about its vertical axis so that all lines on the sheet become parallel to corresponding lines on the ground, is known

Perpendicular offset from a tangent to the junction of a transition curve and circular curve is equal to

Chain surveying is well adopted for

The sag of 50 m tape weighing 4 kg under 5 kg tension is roughly

When the bubble of the level tube of a level, remains central

The power of a lens

For preparation of a contour plan for a route survey

The sum of the interior angles of a geometrical figure laid on the surface of the earth differs from that of the corresponding plane figure only to the extent of one second for every

Angles to a given pivot station observed from a number of traverse stations when plotted, the lines to the pivot station intersect at a common point

There are two stations A and B. Which of the following statements is correct :

The co-ordinate of a point measured perpendicular to the parallel, is called

Metric chains are generally available in

If the length of a chain line along a slope of θ° is l, the required slope correction is

The Random errors tend to accumulate proportionally to

In an internal focusing telescope

The length of a traverse leg may be obtained by multiplying the latitude and

The total change in level along the line is equal to total back sights