195 + Mcqs in Advanced Surveying Page 4 McqOptions

151.	The average eye base is assumed as
A.	58 mm
B.	60 mm
C.	62 mm
D.	64 mm
Answer» E.

Discussion

152.	The movement of the projector in y-direction, introduces in the model a y-parallax
A.	maximum at position 1
B.	maximum at position 2
C.	maximum at position 5 and 6
D.	equally throughout the model.
Answer» E.

Discussion

153.	For adjusting a quadrilateral whose both the diagonals are observed, the equations of conditions involved, are
A.	two angle equations and two side equations
B.	one angle equation and three side equations
C.	three angle equations and one side equation
D.	none of these.
Answer» D. none of these.

Discussion

154.	Pick up the incorrect statement from the following. In a spherical triangle
A.	every angle is less than two right angles
B.	sum of the three angles is equal to two right angles
C.	sum of the three angles less than six right angles and greater than two right angles
D.	if the sum of any two sides is π, the sum of the angles opposite them is also π
Answer» C. sum of the three angles less than six right angles and greater than two right angles

Discussion

155.	If E is the spherical excess and R the radius of the earth, the surface area of the triangle, is
A.	A
B.	B
C.	C
D.	D
Answer» C. C

Discussion

156.	Accidental errors
A.	do not follow any definite mathematical law
B.	cannot be removed by applying corrections to the observed values
C.	are generally small
D.	all the above.
Answer» E.

Discussion

157.	The want of correspondence in stereo-photographs
A.	is a good property
B.	is a function of tilt
C.	is not affected by the change of flying height between photographs
D.	is minimum when θ is 3°.
Answer» C. is not affected by the change of flying height between photographs

Discussion

158.	The station pointer is generally used in
A.	Triangulation surveying
B.	Astronomical surveying
C.	Hydrographical surveying
D.	Photogrammetric surveying.
Answer» D. Photogrammetric surveying.

Discussion

159.	Polaris is usually observed for the determination of the azimuth when it is
A.	at culmination
B.	at elongation
C.	neither at culmination nor at elongation
D.	either at culmination or at elongation.
Answer» C. neither at culmination nor at elongation

Discussion

160.	If δ is the declination of the Polaris and λ is the latitude of the place, the azimuth of the polaris, is
A.	A
B.	B
C.	C
D.	D
Answer» B. B

Discussion

161.	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.	A
B.	B
C.	C
D.	D
Answer» D. D

Discussion

162.	The following parallax equation is applicable to entire overlap of the photographs only if parallax is measured
A.	normal to base line
B.	parallel to base line
C.	both (a) and (b)
D.	neither (a) nor (b)
Answer» C. both (a) and (b)

Discussion

163.	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.	A
B.	B
C.	C
D.	D
Answer» E.

Discussion

164.	The correction applied to the measured base of length L is
A.	A
B.	B
C.	both C and D
D.	All of these
Answer» E.

Discussion

165.	The relation between the air base (B), photographic base (b), flying height (H) and the focal length (f) of a vertical photograph, is
A.	A
B.	B
C.	C
D.	D
Answer» B. B

Discussion

166.	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.	A
B.	B
C.	C
D.	D
Answer» D. D

Discussion

167.	The altitudes of a circumpolar star at culminations are 70Â° and 10Â°, both culminations being north of zenith. The declination of the star, is
A.	80Â°
B.	70Â°
C.	60Â°
D.	50Â°
Answer» D. 50Â°

Discussion

168.	Longitudes are measured from 0Â° to
A.	180Â° eastward
B.	180Â° westward
C.	180Â° east or westward
D.	360Â° eastward
Answer» D. 360Â° eastward

Discussion

169.	The product of the distances of plumb point and horizon point of a vertical photograph from its principal point, is
A.	f 2
B.	2 f 2
C.	3 f 2
D.	f
Answer» B. 2 f 2

Discussion

170.	The declination and right ascension of the sun becomes 23Â° 27' S and 270Â° respectively on
A.	March 21
B.	June 21
C.	September 21
D.	December 22.
Answer» E.

Discussion

171.	In a spherical triangle ABC right angled at C , sin b equals to
A.	sin c sin B
B.	cos c cos B
C.	tan c tan B
D.	sin c cos B
Answer» B. cos c cos B

Discussion

172.	In a spherical triangle ABC , right angled at C , sin b equals
A.	sin a cos A
B.	cos a sin A
C.	tan a cot A
D.	cot A tan a
Answer» D. cot A tan a

Discussion

173.	If a star whose declination is 60Â° N culminates at zenith, its altitude at the lower culmination, is
A.	10Â°
B.	20Â°
C.	30Â°
D.	40Â°
Answer» D. 40Â°

Discussion

174.	The longitudes of two places at latitude 60Â° N are 93Â° E and 97Â° W. Their departure is
A.	5100 nautical miles
B.	5700 nautical miles
C.	120 nautical miles
D.	500 nautical miles
Answer» C. 120 nautical miles

Discussion

175.	The declination and right ascension of the sun becomes 23Â° 27' N and 90Â° respectively on
A.	March 21
B.	June 21
C.	September 21
D.	December 22.
Answer» C. September 21

Discussion

176.	The sidereal day is the time interval between two successive upper transits of
A.	mean sun
B.	first point of Aries
C.	first point of Libra
D.	the polar star
Answer» C. first point of Libra

Discussion

177.	If two points differing by 1Â° of latitude and of the same longitude is 110 km apart on the earth, then two astronomical positions on the moon is about
A.	10 km
B.	25 km
C.	30 km
D.	50 km.
Answer» D. 50 km.

Discussion

178.	23 cm x 23 cm photographs are taken from a flying height with a camera of focal length of 3600 m and 15.23 cm respectively. A parallax difference of 0.01 mm represents
A.	1 m
B.	2 m
C.	3 m
D.	4 m
Answer» B. 2 m

Discussion

179.	If the altitudes of a star at its upper and lower transits are 60Â° 30' and 19Â° 30' respectively, the latitude of the place, is
A.	30Â°
B.	35Â°
C.	40Â°
D.	45Â°.
Answer» D. 45Â°.

Discussion

180.	Pick up the in-correct statement from the folowing :
A.	Correction for refraction is always negative
B.	Correction for parallax is always positive
C.	Correction for semi-diameter is always negative
D.	Correction for dip is always negative
Answer» D. Correction for dip is always negative

Discussion

181.	The normal longitudinal overlap is generally kept
A.	50%
B.	60%
C.	70%
D.	75%.
Answer» C. 70%

Discussion

182.	The great circle along which the sun appears to trace on the celestial sphere with earth as centre during the year, is called
A.	equator
B.	celestial equator
C.	ecliptic
D.	none of these.
Answer» D. none of these.

Discussion

183.	The great circle whose plane is perpendicular to the axis of rotation of the earth, is called
A.	equator
B.	terrestrial equator
C.	0Â° latitude
D.	all the above.
Answer» E.

Discussion

184.	The plane at right angle to the zenith-nadir line and passing through the centre of the earth, is called
A.	rational horizon
B.	true horizon
C.	celestial horizon
D.	all the above.
Answer» E.

Discussion

185.	The Polaris describes a small circle round the pole whose radius is approximately
A.	1Â°
B.	2Â°
C.	3Â°
D.	4Â°.
Answer» B. 2Â°

Discussion

186.	The distance between the minor control point and the principal point should be equal to
A.	base line of the left photograph of stereo pair
B.	base line of the right photograph of stereo pair
C.	sum of the base lines of stereo pair
D.	mean of the base lines of the stereo pair.
Answer» E.

Discussion

187.	The difference of height of two points whose parallax difference is 0.8 mm on a pair of stereo pair taken from a height H is 100 m. If mean photo base is 95.2 mm, the flying height is
A.	8,000 m
B.	10,000 m
C.	12,000 m
D.	14,000 m
Answer» D. 14,000 m

Discussion

188.	The flying height of the camera is 1, 000 m above mean ground level, the distance of the top of a Minar from a nadir point is 10 cm and the relief displacement of Minar is 7.2 mm. The height of the Minar, is
A.	52 m
B.	62 m
C.	72 m
D.	82 m.
Answer» D. 82 m.

Discussion

189.	Rotation of the camera at exposure about its vertical axis, is known as
A.	swing
B.	tilt
C.	tip
D.	none of these.
Answer» B. tilt

Discussion

190.	The following points form a pair of homologous points :
A.	Photo principal point and ground principal point
B.	Photo isocentre and ground isocentre
C.	Photo plumb point and ground plumb point
D.	all the above.
Answer» E.

Discussion

191.	By applying clockwise swing to right projector, maximum y -parallax is introduced in the model at
A.	position 1
B.	position 2
C.	position 4
D.	position 6.
Answer» B. position 2

Discussion

192.	If the equatorial distance between two meridians is 100 km, their distance at 60Â° latitude will be
A.	1000 km
B.	800 km
C.	600 km
D.	500 km
Answer» E.

Discussion

193.	The rate of change of parallax dp / dh with respect to change in h , may be expressed as
A.	fB /( H - h )
B.	fB /( H - h ) 2
C.	fB /( H + h )
D.	fB /( H + h ) 2 .
Answer» C. fB /( H + h )

Discussion

194.	The difference in longitude of two places expressed in time is equal to the difference in their
A.	sidereal time
B.	apparent solar time
C.	mean solar time
D.	all the above.
Answer» E.

Discussion

195.	The parallax equation is applicable to entire overlap of the photographs only if parallax is measured
A.	normal to base line
B.	parallel to base line
C.	both (a) and (b)
D.	neither (a) nor (b).
Answer» C. both (a) and (b)

Discussion

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If two points differing by 1Â° of latitude and of the same longitude is 110 km apart on the earth, then two astronomical positions on the moon is about

23 cm x 23 cm photographs are taken from a flying height with a camera of focal length of 3600 m and 15.23 cm respectively. A parallax difference of 0.01 mm represents

If the altitudes of a star at its upper and lower transits are 60Â° 30' and 19Â° 30' respectively, the latitude of the place, is

Pick up the in-correct statement from the folowing :

The normal longitudinal overlap is generally kept

The great circle along which the sun appears to trace on the celestial sphere with earth as centre during the year, is called

The great circle whose plane is perpendicular to the axis of rotation of the earth, is called

The plane at right angle to the zenith-nadir line and passing through the centre of the earth, is called

The Polaris describes a small circle round the pole whose radius is approximately

The distance between the minor control point and the principal point should be equal to

The difference of height of two points whose parallax difference is 0.8 mm on a pair of stereo pair taken from a height H is 100 m. If mean photo base is 95.2 mm, the flying height is

The flying height of the camera is 1, 000 m above mean ground level, the distance of the top of a Minar from a nadir point is 10 cm and the relief displacement of Minar is 7.2 mm. The height of the Minar, is

Rotation of the camera at exposure about its vertical axis, is known as

The following points form a pair of homologous points :

By applying clockwise swing to right projector, maximum y -parallax is introduced in the model at

If the equatorial distance between two meridians is 100 km, their distance at 60Â° latitude will be

The rate of change of parallax dp / dh with respect to change in h , may be expressed as

The difference in longitude of two places expressed in time is equal to the difference in their

The parallax equation is applicable to entire overlap of the photographs only if parallax is measured