A 30-m metric chain is found to be 10 cm too short throughout a measurement. If the distance measured is recorded as 300 m, what is the actual distance?
The whole circle bearings of lines AB and BC are 30°15′ and 120°30′. What is the included angle ABC between the line AB and BC?
A lighthouse is visible just above the horizon at a certain station at the sea level. Distance between the station and the lighthouse is 60 km. The height of the lighthouse is
Consider the following statements: Reciprocal leveling eliminates the effect of
1. Errors due to Earth’s curve
2. Errors due to atmospheric refraction
3. Mistakes in taking leveling staff readings
4. Errors due to line of collimation
Which of these statements are correct?
The type of surveying in which the curvature of the Earth is taken into account is called
Errors in changing is generally due to
Match List-I with List-II and select the correct answer using the codes given below (where the letters have their usual meaning)
Which of the following errors affect the surveying work seriously?
Chain surveying is suitable when
What is the slope correction for a length of 30 m along a gradient of 1 in 20?
In a chain surveying conducted using 20 m chain, the distance was recorded as 327 m. But later on the chain was found 3 cm longer. What will be the true distance, then?
In a closed traverse having six sides, what will be the sum of the inclined angles?
A bench mark (BM) with reduced level (RL) = 155.305 m has been established at the floor of a room. It is required to find out the RL of the underside of the roof (R) of the room using spirit leveling. The back sight (BS) to the BM has been observed as 1.500 m whereas the foresight (FS) to R has been observed as 0.575 m (staff held inverted). The RL (m) of R will be
The plan of a map was photocopied to a reduced size such that a line originally 100 mm, measures 90 mm. The original scale of the plan was 1 : 1000. The revised scale is
original scale 1:1000
reduced as 90
so put 90/100 for 1
that is 0.9 for 1
new scale is 0.9 for 1000
0.9 :1000 or
The following table gives data of consecutive co-ordinates in respect of a closed theodolite traverse PQRSP.
The magnitude and direction of error of closure in whole circle bearing are
The following measurements were made during testing a leveling instrument
P1 is close to P and Q1 is close to Q. If the reduced level of station P is 100.000 m, the reduced level of station Q is
The plan of a survey plotted to a scale of 10 m to 1 cm is reduced in such a way that a line originally 10 cm long now measures 9 cm. The area of the reduced plan is measured as 81 cm2. The actual (m2) of the survey is ____________.
The observations from a closed loop traverse around an obstacle are:
What is the value of the missing measurement (rounded off to the nearest 10 mm)?
The latitude and departure of a line AB are +78 m and –45.1 m, respectively. The whole circle bearing of the line AB is
Following bearings are observed while traversing with a compass
After applying the correction due to local attraction, the corrected fore bearing of line BC will be