## Saturday, January 4, 2014

### Surveying notes for GATE, PSUs - Part 9

Hello there,
How have you been? Here is 9th part of one liners for the preparation of the GATE and PSUs.
All information is learned through books and practical exercises.

• If quantity A has a weight of 3, then the weight of A/3 will be 27.
• In a parabolic vertical curve, the rising grade g1= +0.80% and the falling grade g2= -0.70%. The rate of change of grade is 0.05 per chain, then the length of the vertical curve is 30 chains.
• While measuring horizontal angles by the method of repetition with a theodolite, readings are taken on both the vernier. Error due to imperfect graduations will be eliminated.
• An angle-measuring instrument reading up to one-sixth of a degree on the main scale is equipped with a vernier having 19 main scale divisions divided into 20 parts. The correct least count for the instrument is 30 seconds.
• If it is required to produce the plan of a small area under the magnetic influence, plane table survey will be the best choice.
• Clinometer- An angle measuring instrument.
• Tellurometer - microwave instrument
• Pantograph- Plan enlarging instrument
• Ghat tracer - Grading finding instrument.
• Offsets are lateral measurements made with respect to main survey line.
Other parts :

### Solved Example-Distance of a Point from a Line, whose end Co-ordinates are given.

Hi, Problem: The X and Y co-ordinates(in meters) of station Shore are 246.87 and 659.46 respectively, and those for station Rock are 437...