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Q1. | Diopter is the power of a lens having a focal length of. |

A. | 25 cm [Wrong Answer] |

B. | 50 cm [Wrong Answer] |

C. | 75 cm [Wrong Answer] |

D. | 125 cm [Correct Answer] |

View Answer
Explanation:-
Answer : DDiscuss it below :Amjad Ali Said on 2020-02-15 17:01:40100cm Himanshu Gupta Said on 2019-06-27 06:16:36100 cm Shriram Bairwa Said on 2018-11-03 07:25:16100cm !! OOPS Login [Click here] is required to post your answer/resultHelp other students, write article, leave your comments |

**Also Read Similar Questions Below :**

⇒ There are two stations

*A*and

*B*. Which of the following statements is correct :

the fore bearing of AB is AB

the back bearing of AB is BA

the fore and back bearings of AB differ by 180Â°

all the above.

⇒ If the rate of gain of radial acceleration is 0.3 m per sec

^{3}and full centrifugal ratio is developed. On the curve the ratio of the length of the transition curve of same radius on road and railway, is.

2.828

3.828

1.828

0.828.

⇒ If the radius of a simple curve is

*R*, the length of the chord for calculating offsets by the method of chords produced, should not exceed.

R/10

R/15

R/20

R/25.

⇒ Select the correct statement.

A contour is not necessarily a closed curve.

A contour represents a ridge line if the concave side of lower value con¬tour lies towards the higher value contour.

Two contours of different elevations do not cross each other except in case of an overhanging cliff.

All of the above statements are correct.

⇒ is a conventional sign of.

mosque

temple

church

idgah.

⇒ Pick up the correct statement from the following.

1 second of arc corresponds to a displacement ratio of 1:206, 300

1 degree of arc corresponds to a displacement ratio of 1:57

the angular errors tend to propagate themselves along a traverse as the square root of the number of stations

all the above.

⇒ The process of turning the telescope about the vertical axis in horizontal plane is known as

transiting

reversing

plunging

swinging

⇒ In plane table survey the method used for locating the plane table station is

Radiation

Intersection

Radiation or intersection

Traversing

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

secant of its reduced bearing

sine of its reduced bearing

cosine of its reduced bearing

tangent of its reduced bearing.

⇒ Pick up the correct statement from the following :

the length of the brass handle is included in the length of chain

the handles are on swivel joints to prevent twisting of the chain

the fifth tag from either end of the chain is numbered 5

all the above.

⇒ Horizontal distances obtained tacheometerically are corrected for.

slope correction

temperature correction

refraction and curvature correction

all the above.

⇒ If the length of a transition curve to be introduced between a straight and a circular curve of radius 500 m is 90 m, the maximum perpendicular offset for the transition curve, is.

0.70 m

1.70 m

2.70 m

3.70 m

⇒ In the double application of principle of reversion, the apparent error is

equal to true error

half the true error

two times the true error

four times the true error

⇒ If the magnetic bearing of the sun at a place at noon in southern hemisphere is 167°, the magnetic declination at that place is

77° N

23° S

13° E

13° W

⇒ To avoid large centering error with very short legs, observations are generally made.

to chain pins

by using optical system for centering the theodolite

to a target fixed on theodolite tripod on which theodolite may be fitted easily

all the above.

⇒ 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

⇒ For a well-conditioned triangle, no angle should be less than

20°

30°

45°

60°

⇒ Cross hairs in surveying telescopes, are fitted.

in the objective glass

at the centre of the telescope

at the optical centre of the eye piece

in front of the eye piece.

⇒ For the construction of highway (or railway).

longitudinal sections are required

cross sections are required

both longitudinal and cross sections are required

none of these.

⇒ Diopter is the power of a lens having a focal length of.

25 cm

50 cm

75 cm

125 cm

⇒ The accuracy of measurement in chain surveying, does not depend upon.

length of the offset

scale of the plotting

importance of the features

general layout of the chain lines.

⇒ Cross staff is an instrument used for

measuring approximate horizontal angles

setting out right angles

measuring bearings of the lines

none of the above

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

-0.11 m

-0.11 m

-1.87 m

-0.137 m

⇒ Contours of different elevations may cross each other only in the case of.

an over hanging cliff

a vertical cliff

a saddle

an inclined plane.

⇒ Pick up the correct statement from the following :

mistakes arise from inattention, inexperience or carelessness

systematic errors persist and have regular effects in the survey performances

accidental errors occur inspite of every precaution is taken

all the above.

⇒ A well conditioned triangle has no angle less than.

20Â°

30Â°

45Â°

60Â°

⇒ Contour interval is

the vertical distance between two con-secutive contours

the horizontal distance between two consecutive contours

the vertical distance between two points on same contour

the horizontal distance between two points on same contour

⇒ Off sets are

Chain lines out of alignment

Small measurements from chain line

Measurements taken in chain surveying

None of the above

⇒ The first temporary adjustment of a prismatic compass is

Levelling

Focussing of the prism

Removing the parallax

Centring

⇒ Which one of the following statements is correct ?

when the axes of rotation of the graduated circle and the verniers are not coincident, the instrument possesses eccentricity

the mean of the readings of the two verniers gives correct reading free from the eccentricity

one vernier may be used if the readings of two verniers differ by a constan

all the above.