HARD QUESTION EXAM VEDA, INDIABIX ETC QUESTIONS

HARD QUESTION EXAM VEDA, INDIABIX ETC QUESTIONS

WITH CORRECT ANSWERS 2024

If a star whose declination is 60° N culminates at zenith, its altitude at the lower culmination, is

A. 10°

B. 20°

C. 30°

• 40° - Correct Answer C. 30°

If 'δ' is the declination of the star and 'φ' is the latitude of the observer then the hour angle of the star at elongation is given by

• sin H = tan φ . cot δ
• cos H = tan φ . cot δ
• tan H = tan φ . cot δ
• None of these - Correct Answer B. cos H = tan φ . cot δ

The suitable contour interval for a map with scale 1 : 10000 is

• 2 m
• 5 m
• 10 m
• 20 m - Correct Answer A. 2 m

Which of the following errors cannot be eliminated by taking both face observations ?

• error due to horizontal axis not being perpendicular to the vertical axis
• index error i.e. error due to imperfect adjustment of the vertical circle vernier
• error due to non-parallelism of the axis of telescope level and line of collimation
• none of the above - Correct Answer D. none of the above

Which of the following errors can be eliminated by taking mean of bot face observations ?

• error due to imperfect graduations
• error due to eccentricity of verniers
• error due to imperfect adjustment of plate levels 1 / 4

• error due to line of collimation not being perpendicular to horizontal axis - Correct Answer D. error

due to line of collimation not being perpendicular to horizontal axis Circumpolar stars

• Rotate round the North Pole
• Rotate round the celestial pole
• Remain always above the horizon
• Are seldom seen near the pole star - Correct Answer C. Remain always above the horizon

Perspective centre relates to

• Parallel projection
• Orthogonal projection
• Central projection
• None of these - Correct Answer C. Central projection

Invar tapes used for measuring base lines, is made of nickel-iron alloy containing nickel

A. 24 %

B. 36 %

C. 40 %

• 60 % - Correct Answer B. 36 %

In direct method of contouring, the process of locating or identifying points lying on a contour is called

• ranging
• centring
• horizontal control
• vertical control - Correct Answer D. vertical control

In the cross-section method of indirect contouring, the spacing of cross-sections depends upon

• contour interval

ii) scale of plan iii) characteristics of ground 2 / 4

The correct answer is

• only (i)
• (i) and (ii)
• (ii) and (iii)
• (i), (ii) and (iii) - Correct Answer D. (i), (ii) and (iii)

Height of instrument method of levelling is

• more accurate than rise and fall method
• less accurate than rise and fall method
• quicker and less tedious for large number of intermediate sights
• none of the above - Correct Answer C. quicker and less tedious for large number of intermediate

sights The hour angle of the heavenly body for Greenwich meridian equals the hour angle of the body for

any other meridian + longitude:

• Mean sun
• True sun
• Vernal equinox
• All the above - Correct Answer D. All the above

Which of the following is not used in measuring perpendicular offsets ?

• line ranger
• steel tape
• optical square
• cross staff - Correct Answer A. line ranger

The nearest star is so far away from the earth that the directions to it from two diametrically opposite points on the earth differs less than

• 0.01 second
• 0.001 second
• 0.0001 second
• None of these - Correct Answer C. 0.0001 second 3 / 4

The method of surveying by triangulation was first introduced by the Dutchman Snell in

A. 1600

B. 1615

C. 1630

• 1650 - Correct Answer B. 1615

The rise and fall method

• is less accurate than height of instrument method
• is not suitable for levelling with tilting levels
• provides a check on the reduction of intermediate point levels
• quicker and less tedious for large number of intermediate sights - Correct Answer C. provides a

check on the reduction of intermediate point levels A telescope is said to be inverted if its

• vertical circle is to its right and the bubble of the telescope is down
• vertical circle is to its right and the bubble of the telescope is up
• vertical circle is to its left and the bubble of the telescope is down
• vertical circle is to its left and the bubble of the telescope is up - Correct Answer A. vertical circle is

to its right and the bubble of the telescope is down A telescope is said to be inverted if its

• vertical circle is to its right and the bubble of the telescope is down
• vertical circle is to its right and the bubble of the telescope is up
• vertical circle is to its left and the bubble of the telescope is down
• vertical circle is to its left and the bubble of the telescope is up - Correct Answer A. vertical circle is

to its right and the bubble of the telescope is down Size of a theodolite is specified by

• the length of telescope
• the diameter of vertical circle
• the diameter of lower plate
• / 4