Exam #2-EGCE Questions And Answers

The angle between the prolongation line and the forward line of a traverse is called correct answer: Deflection angle Angle adjustments in a closed traverse are done using following methods correct answer: Arbitrarily Balance and Equally Balance In engineering surveys, traverses are used as control surveys to correct answer: Locate topographical details for the preparation of plans, layout the construction sites, estimate earthquake quantities and prepare bills (ALL THE ABOVE) Latitudes are calculated using following equation correct answer: Distance (H) cos alpha The chainage mention as 3+ 71.26 meters means correct answer: 371.26meters In open traverse, measurements are done either in a clockwise direction or in a counterclockwise direction. Counterclockwise is quite common correct answer: False A traverse is a series of consecutive line whose ends have been marked in the field, and whose lengths and directions have been determined from measurements correct answer: True Departure is a north south rectangular component of a line. It is also called "northing" correct answer: False In an opened traverse the best option to verify the result is to check the distance and angles twice even thrice correct answer: True Open traverse begins and ends at the same station whose position is known correct answer: False The GPS is used for correct answer: Topographic survey, layout survey, vertical positioning (ALL OF THE ABOVE) To collect the accurate info the value of PDOP should be between correct answer: 2 to 6 What is the name of the USA Satellite System correct answer: NAVSTAR Which are the common errors in GPS correct answer: Clock error, Lonosphere error, multipath error (ALL THE ABOVE) Why do we need at 3 Satellites correct answer: To accurately locate the position of GPS In layout survey, Real Time Kinematic surveyor operates receiver and the other marks the station in the field correct answer: True Epoch is time event of short observation Interval correct answer: True In the Static survey two or more receivers record data from same satellite for the same epochs correct answer: True Kinematic survey is used efficiently in topographic and engineering surveys correct answer: True To eliminate clock errors the GPS receiver and satellite times must match correct answer: True