601. Perpendicularity of an offset may be judged by eye, if the length of the offset is
A. 5 m
B. 10 m
C. 15 m
D. 20 m.

602. The construction of optical square is based, on the principle of optical
A. reflection
B. refraction
C. double refraction
D. double reflection.

603. The conventional sign shown in Fig. 3.1 represents a
A. road bridge
B. railway bridge
C. canal bridge
D. aquaduct,

604. is the conventional sign of
A. temple
B. mosque
C. idgah
D. church

605. The conventional sign shown in Fig. 3.2 represents
A. bridge carrying railway below road
B. bridge carrying road below railway
C. bridge carrying road and railway at the same level
D. a level crossing.

606. The conventional sign shown in Fig. 3.3 represent3 a
A. bridge carrying railway below road
B. bridge carrying road below railway
C. bridge carrying road and railway at the same level
D. a level crossi-Ig.

607. is a conventional sign of
A. mosque
B. temple
C. church
D. idgah.

608. 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.

609. Determining the difference in elevation between two points on the surface of the earth, is known as
A. levelling
B. simple leveling
C. differential levelling
D. longitudinal levelling.

610. 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.

NOTE
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