# Practice Test: Question Set - 21

**1. The chaining on sloping ground is**

- (A) Easier
along the falling gradient

- (B) Easier
along the up gradient

- (C) Equally
convenient along falling as well as up gradient

- (D) All
the above

**2. The additional lines which are measured to show the correctness of the chain surveying are called:**

- (A) Check clines

- (B) Proof
lines

- (C) Tie lines

- (D) All of these

**3. The best method of interpolation of contours, is by**

- (A) Estimation

- (B) Graphical
means

- (C) Computation

- (D) All
of these

**4. Greater accuracy in linear measurements, is obtained by**

- (A) Tacheometry

- (B) Direct
chaining

- (C) Direct
taping

- (D) All
the above

**5. 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*

**6. If Δ is the angle of deflection of a simple curve of radius**

*R*, the length of its long chord, is- (A)

*R*cos Δ/2

- (B) 2

*R*cos Δ/2

- (C)

*R*sin Δ/2

- (D) 2

*R*sin Δ/2

**7. Cross hairs in surveying telescopes, are fitted**

- (A) In the
objective glass

- (B) At
the centre of the telescope

- (C) At the
optical centre of the eye piece

- (D) In
front of the eye piece

**8. Prismatic compass is considered more accurate than a surveyor's compass, because**

- (A) It is
provided with a better magnetic needle

- (B) It
is provided with a sliding glass in the object vane

- (C) Its
graduations are in whole circle bearings

- (D) It
is provided with a prism to facilitate reading of its graduated circle

**9. For high sensivity of the bubble tube**

- (A) A
liquid of low viscosity is used

- (B) A
liquid of low surface tension is used

- (C) The
bubble space should be long

- (D) All
the above

**10. If 50 m point of a 100 m tape is 50 cm off line, and 50 m sections are straight, an error is generated equal to**

- (A) 1/10,000

- (B) 1/15,000

- (C) 1/20,000

- (D) 1/25,000

**11. The radius of curvature of the arc of the bubble tube is generally kept**

- (A) 10
m

- (B) 25 m

- (C) 50
m

- (D) 100
m

**12. The direction of steepest slope on a contour, is**

- (A) Along the
contour

- (B) At
an angle of 45° to the contour

- (C) At
right angles to the contour

- (D) None
of these

**13. The difference in the lengths of an arc and its subtended chord on the earth surface for a distance of 18.2 km, is only**

- (A) 1 cm

- (B) 5 cm

- (C) 10 cm

- (D) 100 cm

**14. If deflection angles are measured in a closed traverse, the difference between the sum of the right-hand and that of the left hand angles should be equal to**

- (A) 0°

- (B) 90°

- (C) 180°

- (D) 360°

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

- (A) Length
of the offset

- (B) Scale
of the plotting

- (C) Importance
of the features

- (D) General
layout of the chain lines

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