Engine: General Subjects

Question 2,068 of 1,128

Suppose that a standard bourdon tube pressure gauge has a scale of 0 to 1000 psig. If the accuracy of the gauge is plus or minus .5% of the span, what would the range of measured pressure be if the gauge indicates 690 psig?

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Comments from mariners who studied this question.

Ni NicMY · Mar 3, 2016

.5% = .005, so the Answer should be D) 636.55 to 693.45
Unless I read wrong?

Sh Shawn · Mar 3, 2016

.005 * 1,000 = 5.. So +/- 5 from 690?

That's my guess, but I'm not an engineer.

Ni NicMY · Mar 4, 2016

Ah, yes. I re-read the question (the problem was my reading comprehension. Not the problem.) Thanks, Shawn.

rs rsfcg16 · Mar 7, 2016

Answer should be D) 686.55 to 693.45 as we are referring/basing to 690 PSIG and not the 1000 psig range of the gauge. correct me if am wrong.

Ni NicMY · Mar 8, 2016

It is actually C, because it is looking at the .5% from the span (1000 psig)