Surveying Set 1 MCQs

Q1 | During chaining along a straight line, the . leader of the party has 4 arrows in his hand while the follower has 6. Distance of the follower from the starting point is

4 chains

6 chains

120 m

180m

Q2 | A metallic tape is made of

steel

invar

linen

cloth and wires

Q3 | For a well-conditioned triangle, no angle should beless than

20°

30°

45°

60°

Q4 | The angle of intersection of the two plane mirrors ofan optical square is

30°

45°

60°

90°

Q5 | The allowable length of an offset depends upon the

degree of accuracy required

method of setting out the perpendiculars and nature of ground

scale of plotting

all of the above

Q6 | Which of the following angles can be set out with the help of French cross staff?

45° only

90° only

either 45° or 90°

any angle

Q7 | Which of the following methods of offsets involves less measurement on theground?

method of perpendicular offsets

method of oblique offsets

method of ties

all involve equal measurement on the ground

Q8 | The permissible error in chaining for measurement with chain on rough or hillyground is

1 in 100

1 in 250

1 in 500

1 in 1000

Q9 | The correction for sag is

always additive

always subtractive

always zero

sometimes additive and sometimes subtractive

Q10 | Cross staff is an instrument used for

measuring approximate horizontal angles

setting out right angles

measuring bearings of the lines

none of the above

Q11 | Normal tension is that pull which

is used at the time of standardising the tape

neutralizes the effect due to pull and sag

makes the correction due to sag equal to zero

makes the correction due to pull equal to zero

Q12 | Which of the following is not used in measuring perpendicular offsets ?

line ranger

steel tape

optical square

cross staff

Q13 | If the length of a chain is found to be short on testing, it can be adjusted by

straightening the links

removing one or more small circular rings

closing the joints of the rings if opened out

all of the above

Q14 | The maximum tolerance in a 20 m chain is

±2 mm

±3 mm

±5 mm

±8 mm

Q15 | For accurate work, the steel band should always be used in preference to chainbecause the steel band

is lighter than chain

is easier to handle

is practically inextensible and is not liable to kinks when in use

can be easily repaired in the field

Q16 | The length of a chain is measured from

centre of one handle to centre of other handle

outside of one handle to outside of other handle

outside of one handle to inside of other handle

inside of one handle to inside of other handle

Q17 | Select the incorrect statement.

The true meridians at different places are parallel to each other.

The true meridian at any place is not variable.

The true meridians converge to a point in northern and southern hemispheres.

The maps prepared by national survey departments of any country are based on true meridi

Q18 | If the true bearing of a line AB is 269° 30?, then the azimuthof the line AB is

0° 30?

89° 30?

90° 30?

269° 30?

Q19 | In the prismatic compass

the magnetic needle moves with the box

the line of the sight does not move with the box

the magnetic needle and graduated circle do not move with the box

the graduated circle is fixed to the box and the magnetic needle always remains in the N-S direction

Q20 | For a line AB

the forebearing of AB and back bearing of AB differ by 180°

the forebearing of AB and back bearing of BA differ by 180°

both (a) and (b) are correct.

none is correct

Q21 | Local attraction in compass surveying may exist due to

incorrect levelling of the magnetic needle

loss of magnetism of the needle

friction of the needle at the pivot

presence of magnetic substances near the instrument

Q22 | In the quadrantal bearing system, a whole circle bearing of 293° 30? can be expressed as

W23°30’N

N66°30’W

S113°30’N

N23°30’W

Q23 | The prismatic compass and surveyor’s compass

give whole circle bearing (WCB) of a line and quadrantal bearing (QB) of a line respectively

both give QB of a line and WCB of a line

both give QB of a line

both give WCB of a line

Q24 | The horizontal angle between the true meridian and magnetic meridian at aplace is called

azimuth

declination

local attraction

magnetic bearing

Q25 | A negative declination shows that the magnetic meridian is to the

eastern side of the true meridian

western side of the true meridian

southern side of the true meridian

none of the above