Q76: The line which is used to collect the details of the objects in an area is called:
  • Base line
  • Check line
  • Main line
  • Tie line

Correct Answer: D. Tie line

Solution:

A tie line is a survey line that joins subsidiary or tie stations on the main survey lines. Its primary purpose is to take offsets to locate interior details of the objects in the area, thus "tying" them to the main framework.

Q77: Which of the following is NOT a traversing survey?
  • Chain and compass survey
  • Chain survey
  • Tacheometer survey
  • Plane table survey

Correct Answer: C. Tacheometer survey

Solution:

Traversing is a method of surveying where a series of connected lines form a framework. Chain survey, compass survey, and plane table survey are all methods that can be used to conduct a traverse. A tacheometer survey, however, is a method of optical distance measurement where horizontal and vertical distances are determined from stadia readings on a leveling staff, which is a form of triangulation/radiation, not traversing.

Q78: A prism square is used to:
  • set out a horizontal circular curve
  • set out a line at 45° to a survey line, without any linear measurement
  • get an enlarged view of station marks
  • set a line at right angles to a survey line

Correct Answer: D. set a line at right angles to a survey line

Solution:

A prism square is a handheld optical instrument used in surveying for the same primary purpose as an optical square or a cross-staff: to establish a line of sight that is precisely 90° to an existing survey line. This is essential for accurately setting out offsets.

Q79: Gunter's chain is .......... m long.
  • 23.12
  • 21.12
  • 22.12
  • 20.12

Correct Answer: D. 20.12

Solution:

A Gunter's chain is 66 feet long. To convert this to meters, we use the conversion factor 1 foot = 0.3048 meters.
Length in meters = 66 ft * 0.3048 m/ft = 20.1168 m.
This is approximately 20.12 meters.

Q80: In a chain surveying work of a traverse, it is necessary to apply the correction due to sag for the tape. The correction is:
  • always negative
  • always positive
  • either negative or positive
  • dependent on the temperature conditions

Correct Answer: A. always negative

Solution:

When a tape or chain is suspended between two points, it sags under its own weight into a catenary shape. The measured distance along this curve is always longer than the true horizontal distance between the two points. Therefore, the correction for sag must always be subtracted from the measured length, making it a negative correction.

Q81: A 30 m tape was tested before a survey and found to have a length of 29.93 m. If the length of a line measured with this tape is 270 m, find the true length of the line.
  • 274.18 m
  • 272.23 m
  • 269.37 m
  • 273.99 m

Correct Answer: C. 269.37 m

Solution:

The relationship between true and measured lengths is given by:
True Length = (Actual Length of Tape / Designated Length of Tape) * Measured Length
Given:
Actual Length of Tape = 29.93 m
Designated Length of Tape = 30 m
Measured Length = 270 m
True Length = (29.93 / 30) * 270 = 269.37 m.
Since the tape is shorter than standard, the true length measured will be less than the recorded length.

Q82: What is the length of a Surveyor's chain?
  • 33 feet
  • 133 feet
  • 66 feet
  • 100 feet

Correct Answer: C. 66 feet

Solution:

The standard Surveyor's chain, also known as Gunter's chain, has a length of 66 feet. This length was chosen because 10 square chains are equal to one acre, which was a convenient unit for land measurement.

Q83: The length of a road measured with a 30-metre chain was found to be 300 metres. What is the true length of the road if the chain was 10 cm too long?
  • 301 metres
  • 298 metres
  • 299 metres
  • 302 metres

Correct Answer: A. 301 metres

Solution:

We use the formula:
True Length = (Actual Length of Chain / Designated Length of Chain) * Measured Length
Given:
Actual Length of Chain = 30 m + 10 cm = 30.1 m
Designated Length of Chain = 30 m
Measured Length = 300 m
True Length = (30.1 / 30) * 300 = 301 m.
Since the chain is longer than standard, the true length will be more than the measured length.

Q84: The longest line in a chain survey, which passes through the center of the area, is called the:
  • Base line
  • Check line
  • Tie line
  • Main line

Correct Answer: A. Base line

Q85: An offset is called a perpendicular offset if the angle to the chain line is:
  • 45°
  • 90°
  • 120°
  • 180°

Correct Answer: B. 90°

Q86: In the stepping method of chaining on a slope, the chain is held:
  • Parallel to the slope
  • Horizontally
  • Vertically
  • At a 45° angle

Correct Answer: B. Horizontally

Q87: A Revenue chain consists of how many links?
  • 100
  • 16
  • 66
  • 33

Correct Answer: B. 16

Q88: The 'leader' in a chaining party is responsible for:
  • Dragging the chain forward and inserting arrows
  • Picking up the arrows
  • Directing the alignment
  • Recording the measurements in the field book

Correct Answer: A. Dragging the chain forward and inserting arrows

Q89: Offsets are generally classified into how many types?
  • Two
  • Three
  • Four
  • Five

Correct Answer: A. Two (Perpendicular and Oblique)

Q90: What is the length of one link in a Gunter's chain?
  • 1 foot
  • 0.66 feet
  • 0.33 feet
  • 1.5 feet

Correct Answer: B. 0.66 feet

Q91: An Engineer's chain is how long?
  • 66 ft
  • 100 ft
  • 33 ft
  • 150 ft

Correct Answer: B. 100 ft

Q92: A river is an example of which type of obstacle in chaining?
  • Obstacle to ranging only
  • Obstacle to chaining but not ranging
  • Obstacle to both chaining and ranging
  • Not an obstacle

Correct Answer: B. Obstacle to chaining but not ranging

Q93: The book in which chain or tape measurements are entered is called a:
  • Log book
  • Field book
  • Ledger
  • Survey diary

Correct Answer: B. Field book

Q94: The slope correction for a length 'L' and a difference in elevation 'h' is approximately:
  • h/2L
  • h²/L
  • h²/2L
  • h/L

Correct Answer: C. h²/2L

Q95: A survey line which is run to join some fixed points on the main survey lines is known as a:
  • Base Line
  • Tie Line
  • Check Line
  • Main Station

Correct Answer: B. Tie Line

Q96: Ranging rods are typically painted with alternate bands of:
  • Red and yellow
  • Blue and white
  • Red and white or Black and white
  • Green and yellow

Correct Answer: C. Red and white or Black and white

Q97: If the measured length of a line is 500 m and the chain used is 5 cm too short, the actual length of the line is:
  • 500.83 m
  • 499.17 m
  • 500.05 m
  • 499.95 m

Correct Answer: B. 499.17 m

Q98: What does the principle "working from whole to part" help to localize?
  • Errors
  • Survey stations
  • Obstacles
  • Details

Correct Answer: A. Errors

Q99: An offset rod is essentially a ranging rod that also has a:
  • Hook or notch at the top
  • Plumb bob attached
  • Hook for pulling the chain through hedges
  • Sharpened point

Correct Answer: A. Hook or notch at the top

Q100: Which type of error tends to cancel out over the course of a survey?
  • Systematic Error
  • Compensating Error
  • Cumulative Error
  • Mistake

Correct Answer: B. Compensating Error