WorksheetsChain Survey - Part 5
Total questions: 10
Worksheet time: 5mins
Name
Class
Date
1.
Linear error in an offset occurs when:
a)
The offset is not perpendicular to the chain line
b)
The measured length of the offset is wrong
c)
The chain line is not straight
d)
The ranging rod is misaligned
2.
Angular error in an offset is caused when:
a)
The chain length is incorrect
b)
The offset length is too long
c)
The offset is not taken at 90° to the chain line
d)
The staff is not properly held
3.
The error due to wrong direction in an offset is proportional to:
a)
The square of the offset length
b)
The cosine of the angular error
c)
The sine of the angular error
d)
The tangent of the angular error
4.
The combined error in an offset measurement is caused by:
a)
Only incorrect chaining
b)
Only incorrect angle
c)
Both incorrect offset length and incorrect direction
d)
Only slope of the ground
5.
Directional error becomes larger when:
a)
The offset length is small
b)
The offset length is large
c)
The chain line is sloping
d)
The tape is steel
6.
The error due to wrong direction in an offset acts:
a)
Along the chain line
b)
Perpendicular to the true offset
c)
Parallel to the measured offset
d)
Along the ground slope
7.
Which instrument is used to avoid angular error while taking offsets?
a)
Ranging rod
b)
Surveyor’s compass
c)
Cross staff or optical square
d)
Dumpy level
8.
Which practical step reduces the magnitude of offset errors?
a)
Increasing offset length
b)
Observing angles by estimation
c)
Keeping offsets short
d)
Using only a measuring tape
9.
A plotting error caused by both incorrect offset length and incorrect angle is termed as:
a)
Chaining error
b)
Resultant offset error
c)
Bearing error
d)
Leveling error
10.
The magnitude of direction error depends mainly on:
a)
Time of observation
b)
Offset length and angular deviation
c)
Temperature conditions
d)
Colour of the ranging rod
100 %
