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Civil Engineering - Surveying

Exercise : Surveying - Section 2
21.
The diaphragm of a stadia theodolite is fitted with two additional
horizontal hairs
vertical hairs
horizontal and two vertical hairs
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
Centering error of a theodolite produces an error
in all angles equally
which does not vary with the direction or pointing
which varies with the direction of pointing and inversely with the length of sight
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
In levelling operation
if second reading is more than first, it represents a rise
if first reading is more than second, it represents a rise
if first reading is less than second, it represents a fall
if second reading is less than first, it represents a fall
both (b) and (c).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
A tape of length l and weight W kg/m is suspended at its ends with a pull of P kg, the sag correction is
.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
Pick up the correct statement from the following :
in astronomical telescope, the rays from the object after refraction at the objective are brought to a focus before entering the eyepiece to produce a real inverted image in front of the eye piece
in Galileo's telescope, the rays from the object get refracted at the objective and are intercepted by the eyepiece before a real image is formed
a line passing through the optical centre of the objective traversing through the eyepiece, is called line of sight
the line of sight which passes through the intersection of cross-lines marked on a diaphragm fixed in front of the eyepiece in a plane at right-angles to the axis, is called the line of collimation
all the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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