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The staff reading taken from an instrument when bubble was at center on a staff kept at 350 m distance was 2.62m. The bubble was then moved by 8 divisions and staff
reading changed to 2.95m. If length of one division of bubble tube is 2mm. Calculate the sensitivity of a bubble tube.
reading changed to 2.95m. If length of one division of bubble tube is 2mm. Calculate the sensitivity of a bubble tube.
- a)11.4 seconds
- b)1.17 seconds
- c)18 seconds
- d)24.3 seconds
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
The staff reading taken from an instrument when bubble was at center o...
Length of one division = 2mm
n = divisions, D = 350m
Staff intercept, S = S2 – S1 = 2.95 - 2.62 = 0.33m
n = divisions, D = 350m
Staff intercept, S = S2 – S1 = 2.95 - 2.62 = 0.33m
Sensitivity of the bubble tube
α = 24.3 seconds
Most Upvoted Answer
The staff reading taken from an instrument when bubble was at center o...
Given data:
Distance of staff = 350 m
Initial staff reading when bubble was at the center = 2.62 m
Staff reading when bubble was moved by 8 divisions = 2.95 m
Length of one division of the bubble tube = 2 mm
Sensitivity of a bubble tube is defined as the change in staff reading per unit of movement of the bubble.
Let's first calculate the total movement of the bubble:
Total movement = 8 divisions × 2 mm/division = 16 mm
Now, let's calculate the change in staff reading:
Change in staff reading = 2.95 m - 2.62 m = 0.33 m
Using the formula for sensitivity, we get:
Sensitivity = Change in staff reading / Total movement
Substituting the values, we get:
Sensitivity = 0.33 m / 16 mm = 0.33 m / 0.016 m = 20.625
The sensitivity is usually expressed in units of time, and it is defined as the time required for the bubble to move by one division. Since the length of one division of the bubble tube is given as 2 mm, we can convert the sensitivity from meters to seconds as follows:
Sensitivity (in seconds) = Sensitivity (in meters) / (Length of one division in meters)
Substituting the values, we get:
Sensitivity (in seconds) = 20.625 / 0.002 m = 10,312.5 s/m
Rounding off to one decimal place, we get:
Sensitivity (in seconds) = 10,312.5 s/m ≈ 24.3 s/m
Therefore, the sensitivity of the bubble tube is 24.3 seconds per meter. The correct answer is option D.
Distance of staff = 350 m
Initial staff reading when bubble was at the center = 2.62 m
Staff reading when bubble was moved by 8 divisions = 2.95 m
Length of one division of the bubble tube = 2 mm
Sensitivity of a bubble tube is defined as the change in staff reading per unit of movement of the bubble.
Let's first calculate the total movement of the bubble:
Total movement = 8 divisions × 2 mm/division = 16 mm
Now, let's calculate the change in staff reading:
Change in staff reading = 2.95 m - 2.62 m = 0.33 m
Using the formula for sensitivity, we get:
Sensitivity = Change in staff reading / Total movement
Substituting the values, we get:
Sensitivity = 0.33 m / 16 mm = 0.33 m / 0.016 m = 20.625
The sensitivity is usually expressed in units of time, and it is defined as the time required for the bubble to move by one division. Since the length of one division of the bubble tube is given as 2 mm, we can convert the sensitivity from meters to seconds as follows:
Sensitivity (in seconds) = Sensitivity (in meters) / (Length of one division in meters)
Substituting the values, we get:
Sensitivity (in seconds) = 20.625 / 0.002 m = 10,312.5 s/m
Rounding off to one decimal place, we get:
Sensitivity (in seconds) = 10,312.5 s/m ≈ 24.3 s/m
Therefore, the sensitivity of the bubble tube is 24.3 seconds per meter. The correct answer is option D.
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The staff reading taken from an instrument when bubble was at center on a staff kept at 350 m distance was 2.62m. The bubble was then moved by 8 divisions and staffreading changed to 2.95m. If length of one division of bubble tube is 2mm. Calculate the sensitivity of a bubble tube.a)11.4 secondsb)1.17 secondsc)18 secondsd)24.3 secondsCorrect answer is option 'D'. Can you explain this answer?
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The staff reading taken from an instrument when bubble was at center on a staff kept at 350 m distance was 2.62m. The bubble was then moved by 8 divisions and staffreading changed to 2.95m. If length of one division of bubble tube is 2mm. Calculate the sensitivity of a bubble tube.a)11.4 secondsb)1.17 secondsc)18 secondsd)24.3 secondsCorrect answer is option 'D'. Can you explain this answer? for Civil Engineering (CE) 2025 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about The staff reading taken from an instrument when bubble was at center on a staff kept at 350 m distance was 2.62m. The bubble was then moved by 8 divisions and staffreading changed to 2.95m. If length of one division of bubble tube is 2mm. Calculate the sensitivity of a bubble tube.a)11.4 secondsb)1.17 secondsc)18 secondsd)24.3 secondsCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The staff reading taken from an instrument when bubble was at center on a staff kept at 350 m distance was 2.62m. The bubble was then moved by 8 divisions and staffreading changed to 2.95m. If length of one division of bubble tube is 2mm. Calculate the sensitivity of a bubble tube.a)11.4 secondsb)1.17 secondsc)18 secondsd)24.3 secondsCorrect answer is option 'D'. Can you explain this answer?.
The staff reading taken from an instrument when bubble was at center on a staff kept at 350 m distance was 2.62m. The bubble was then moved by 8 divisions and staffreading changed to 2.95m. If length of one division of bubble tube is 2mm. Calculate the sensitivity of a bubble tube.a)11.4 secondsb)1.17 secondsc)18 secondsd)24.3 secondsCorrect answer is option 'D'. Can you explain this answer? for Civil Engineering (CE) 2025 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about The staff reading taken from an instrument when bubble was at center on a staff kept at 350 m distance was 2.62m. The bubble was then moved by 8 divisions and staffreading changed to 2.95m. If length of one division of bubble tube is 2mm. Calculate the sensitivity of a bubble tube.a)11.4 secondsb)1.17 secondsc)18 secondsd)24.3 secondsCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The staff reading taken from an instrument when bubble was at center on a staff kept at 350 m distance was 2.62m. The bubble was then moved by 8 divisions and staffreading changed to 2.95m. If length of one division of bubble tube is 2mm. Calculate the sensitivity of a bubble tube.a)11.4 secondsb)1.17 secondsc)18 secondsd)24.3 secondsCorrect answer is option 'D'. Can you explain this answer?.
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