WorksheetsDay 61-Nov 24-worksheet-Diploma-Chain surveying part 2
Total questions: 15
Worksheet time: 10mins
The slope of survey lines is measured using a
Hand level
Ranging rod
Clinometer
Optical square
The horizontal distance from a sloping length l is obtained by the formula
D=ltanθ
D=lsecθ
D=lcosθ
D=lsinθ
An obstacle to vision but not to chaining is
Building
River
Forest
Pond
Cumulative errors are
Always negative
Always accidental
Proportional to measured length
Independent of length
When the chain is longer than standard, the measured distance will be
(a)
Correction for pull becomes additive when
P<Po
P=Po
P>Po
Pull is zero
Sag correction is always negative.
True
False
Error due to slope is compensating in nature.
True
False
Assertion (A): Errors due to bad ranging are cumulative. Reason (R): Bad ranging increases the measured length beyond the actual.
A and R true; R explains A
A and R true; R does not explain A
A true, R false
A false, R true
A pond is classified as an obstacle to ________ but not to ________.
(a)
Incorrect chain length produces (a) errors.
Temperature correction is Ct = α × L × (________ − ________).
Tm − T0
T0 − Tm
Tm + T0
α − L
Errors that tend to cancel each other are called (a) errors.
A 30 m chain is 0.03 m too long.What is it’s correction factor?
(a)
Find the odd one out (based on type of chaining error):
Sag
Temperature
Pull
Incorrect ranging
