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CE 111 Exam 1 Questions and Answers
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CE 111 Exam 1 Questions and Answers
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CE 111 Exam 1 Questionsand Answers
Denning [Date] [Course title]
,Fundamental Principle of Surveying - Correct Answers: No measurement is exact
Sources of Error - Correct Answers: 1. Nature
2. Instrument
3. Person/Operator
Error Equation - Correct Answers: Error = measured value - true value
Corrections = -error
Systematic Error - Correct Answers: can result from old equipment giving consistent results that are not
exact
Random Error - Correct Answers: - generally small in magnitude
- cannot be calculated directly
- can be positive or negative
- cannot be total eliminated
- follow a normal distribution pattern
Random Error Accumulation - Correct Answers: random errors accumulate as the square root of the
number of opportunities for the error
Relative Precision - Correct Answers: 1/x=standard error of mean/average length
Aim for 1/5000
Precision - Correct Answers: refers to the consistency of observations
Accuracy - Correct Answers: refers to the absolute nearness of observed quantities to their true value
, Cubit - Correct Answers: An early measurement; elbow to the tip of a man's middle finger
Fathom - Correct Answers: An early measurement; tip of man's left middle finger to the tip of man's
right middle finger when arms are completely outstretched
Foot - Correct Answers: An early measurement; length of an average man's foot (12 inches)
Rod/Pole/Perch - Correct Answers: An early measurement; taking 16 men and lining their left feet up
heal to toe
Gunter's Chain - Correct Answers: - invented in 1620
- distance = 66 feet
- comprised of 100 links (~8 in. long each)
- provides origin of the acre (the amount of work an oxen team could do in a day)
- used to lay out early 2-lane roads
Steel Tape - Correct Answers: - made from steel
- distance (typical) - 100 feet
- have to apply corrections (for temperature, sag, bends, tension, and more)
Burma, Liberia, and United States - Correct Answers: All countries use metric except:
Meter - Correct Answers: - 1/10,000,000 of the distance from the equator to the North Pole
- equal to 3.280840ft
Vertical, Horizontal, Slope - Correct Answers: three types of distances:
Techniques for Distance Measurement - Correct Answers: - pacing
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