Podcast
Questions and Answers
What is the main purpose of compass surveys?
What is the main purpose of compass surveys?
- To measure distances using a magnetic compass
- To provide accurate measurements for small areas
- To provide rapid filling of details in larger surveys (correct)
- To align the compass needle to the earth's magnetic field
When is chain survey preferred over compass survey?
When is chain survey preferred over compass survey?
- When magnetic disturbances are present
- For large areas where rapid work is required
- When the survey line direction is important
- For small areas where high accuracy is needed (correct)
What is one major drawback of using a compass for determining the bearing of a line?
What is one major drawback of using a compass for determining the bearing of a line?
- The compass needle aligns inconsistently with the magnetic field (correct)
- High level of accuracy in determining direction
- Inability to measure distances accurately
- Constant reference point provided by the earth's magnetic field
What is the main use of a prismatic compass?
What is the main use of a prismatic compass?
Why should care be taken when using a compass survey?
Why should care be taken when using a compass survey?
Which type of survey is mainly used for rapid filling of details in larger surveys?
Which type of survey is mainly used for rapid filling of details in larger surveys?
What is the main difference between the Prismatic Compass and the Surveyor's Compass?
What is the main difference between the Prismatic Compass and the Surveyor's Compass?
What is the purpose of the 45º reflecting prism in the Prismatic Compass?
What is the purpose of the 45º reflecting prism in the Prismatic Compass?
What is the function of the lifting pin and lifting lever in the Prismatic Compass?
What is the function of the lifting pin and lifting lever in the Prismatic Compass?
Which part serves as the heart of the Prismatic Compass?
Which part serves as the heart of the Prismatic Compass?
Why do the graduations on the Prismatic Compass remain stationary with the needle?
Why do the graduations on the Prismatic Compass remain stationary with the needle?
What is the purpose of the mirror located in front of the forward vane in the Prismatic Compass?
What is the purpose of the mirror located in front of the forward vane in the Prismatic Compass?
Why is the graduated circle or ring in the Prismatic Compass marked from 0º to 360º?
Why is the graduated circle or ring in the Prismatic Compass marked from 0º to 360º?
What does the object vane in a Prismatic Compass carry?
What does the object vane in a Prismatic Compass carry?
What is a non-magnetic metal case with a glass top in a Prismatic Compass known as?
What is a non-magnetic metal case with a glass top in a Prismatic Compass known as?
What part of a Prismatic Compass carries a fine slit provided with an eye hole at bottom?
What part of a Prismatic Compass carries a fine slit provided with an eye hole at bottom?
What is the main purpose of a surveyor's compass?
What is the main purpose of a surveyor's compass?
How is the bearing measured in a surveyor's compass?
How is the bearing measured in a surveyor's compass?
What is the difference between Fore Bearing (FB) and Back Bearing (BB)?
What is the difference between Fore Bearing (FB) and Back Bearing (BB)?
If a Fore Bearing is 1200, what would be the corresponding Back Bearing?
If a Fore Bearing is 1200, what would be the corresponding Back Bearing?
How is a traverse plotted after traversing with the compass?
How is a traverse plotted after traversing with the compass?
What system measures the bearing in quadrants starting from North?
What system measures the bearing in quadrants starting from North?
What does Reduced Bearing (R.B) refer to?
What does Reduced Bearing (R.B) refer to?
In what direction are survey lines measured in Quadrantal Bearing System?
In what direction are survey lines measured in Quadrantal Bearing System?
'The bearing of a line measured with respect to magnetic meridian in clockwise direction.' Which system does this statement describe?
'The bearing of a line measured with respect to magnetic meridian in clockwise direction.' Which system does this statement describe?
'In this system, the bearing of survey lines are measured wrt to north line.' Which system is being referred here?
'In this system, the bearing of survey lines are measured wrt to north line.' Which system is being referred here?
What is the purpose of using sun glasses in the prismatic compass?
What is the purpose of using sun glasses in the prismatic compass?
How is the centering of the prismatic compass checked?
How is the centering of the prismatic compass checked?
What is the purpose of levelling the compass in a prismatic compass operation?
What is the purpose of levelling the compass in a prismatic compass operation?
What does the term 'whole circle bearing' refer to in a prismatic compass operation?
What does the term 'whole circle bearing' refer to in a prismatic compass operation?
What is the reason behind variations in magnetic declination mentioned in the text?
What is the reason behind variations in magnetic declination mentioned in the text?
What is the secular variation related to magnetic declination?
What is the secular variation related to magnetic declination?
How is the magnetic bearing of a survey line defined?
How is the magnetic bearing of a survey line defined?
What defines the direction of a magnetic meridian at any place?
What defines the direction of a magnetic meridian at any place?
'Angle of Declination' is defined as:
'Angle of Declination' is defined as:
How does Diurnal Variation differ from Secular Variation in terms of time frame?
How does Diurnal Variation differ from Secular Variation in terms of time frame?
What is local attraction in compass survey?
What is local attraction in compass survey?
How is local attraction detected in a compass survey?
How is local attraction detected in a compass survey?
What is the first method used to eliminate local attraction?
What is the first method used to eliminate local attraction?
In a closed traverse, what is a check available for angular error?
In a closed traverse, what is a check available for angular error?
What does the transit rule apply to in surveying?
What does the transit rule apply to in surveying?
What is levelling in surveying?
What is levelling in surveying?
What is a level surface in levelling?
What is a level surface in levelling?
How is horizontal surface defined in levelling?
How is horizontal surface defined in levelling?
What is the role of inspection compasses in surveying?
What is the role of inspection compasses in surveying?
What is the point or surface with respect to which levels of other points or planes are calculated called?
What is the point or surface with respect to which levels of other points or planes are calculated called?
What is the average height of the sea of all stages of tides known as?
What is the average height of the sea of all stages of tides known as?
What is a relatively permanent point of reference with a known elevation w.r.t. a datum called?
What is a relatively permanent point of reference with a known elevation w.r.t. a datum called?
Which instrument provides a horizontal line of sight and magnifies readings far away from it?
Which instrument provides a horizontal line of sight and magnifies readings far away from it?
What is the main advantage of a dumpy level over a wye level?
What is the main advantage of a dumpy level over a wye level?
What is a levelling staff used for?
What is a levelling staff used for?
What imaginary line is horizontal when the bubble in the telescope is centered?
What imaginary line is horizontal when the bubble in the telescope is centered?
What is the main purpose of differential leveling in surveying?
What is the main purpose of differential leveling in surveying?
What is another term for 'Fly Leveling' as mentioned in the text?
What is another term for 'Fly Leveling' as mentioned in the text?
In surveying, what is the purpose of taking back sight readings at turning points?
In surveying, what is the purpose of taking back sight readings at turning points?
What is the method used to calculate Reduced Levels in differential leveling?
What is the method used to calculate Reduced Levels in differential leveling?
What does the arithmetic check ΣB.S - ΣF.S = ΣRISE - ΣFALL represent in surveying?
What does the arithmetic check ΣB.S - ΣF.S = ΣRISE - ΣFALL represent in surveying?
Why is setting up turning points necessary in differential leveling?
Why is setting up turning points necessary in differential leveling?
What is the term for the operation of bringing the clear image of an object into the plane of cross hairs in a telescope?
What is the term for the operation of bringing the clear image of an object into the plane of cross hairs in a telescope?
What is the error that occurs when the bubble is not in the center of the run in a bubble tube?
What is the error that occurs when the bubble is not in the center of the run in a bubble tube?
In levelling, what is the term for the last reading taken from an instrument just before shifting it?
In levelling, what is the term for the last reading taken from an instrument just before shifting it?
What is the term for a point on which both fore sight and back sight are taken?
What is the term for a point on which both fore sight and back sight are taken?
Which type of levelling involves determining the difference in levels of two nearby points?
Which type of levelling involves determining the difference in levels of two nearby points?
What is the term for carrying out levelling with respect to a temporary bench mark?
What is the term for carrying out levelling with respect to a temporary bench mark?
Which type of levelling involves finding reduced levels of various points at regular intervals along a line or set of lines?
Which type of levelling involves finding reduced levels of various points at regular intervals along a line or set of lines?
What kind of telescope is externally focused by moving either the objective or eye piece?
What kind of telescope is externally focused by moving either the objective or eye piece?
What is eliminated by making the lengths of two sides equal in a bubble tube?
What is eliminated by making the lengths of two sides equal in a bubble tube?
What is the term for the type of levelling used when it's not possible to balance fore sight and back sight due to various errors?
What is the term for the type of levelling used when it's not possible to balance fore sight and back sight due to various errors?
