Strengths and Improvement Opportunities
ME306-Spring 2019- Quiz-3 G2
Course: Instrumentation & Control Engineering Instructor: Eng. Aliaa Maar Questions: 8
StdDev = 1.63Mean = 8.38Median = 9Rank = 16/21Percentile Rank = 19.0476
*Bonus points were available on this assessment and were calculated into the score.
87.50%
My Score
(7/8)*
104.76%
Average Score
(8.38/8)*
QUESTION
PARTIAL CREDIT
CORRECT
INCORRECT
1
Multiple earthing points can create potential difference between them and lead to an internal noise signal
>
True
X False
2
Twisted pairs of wires is used to avoid capacitive coupling because the e.m.f induced in each pair cancel out the
other
X
True
> False
3
A microprocessor can be used as a data processing element in instrumentation systems
>
True
X False
4
A changing current in a nearby circuit produces a changing magnetic field which can induce e.m.f.s in the
measurement system. the above statement indicate a certain type of noise. select the correct answer.
> A:
Inductive coupling
X B: Capacitive coupling
X C: Multiple earths
X D: None of the above answers
5
In the data transmission, the voltage attenuation can be avoided by using analouge voltage trasmission
X True
>
False
6
[BONUS QUESTION] A microprocessor gives a maximum output of the binary word (1111111) . This is fed through
a digital-to-analogue converter to a control valve which requires 7.0 V to be fully open. If the fully open state is to
be indicated by the maximum output (1111111) and the fully closed state ro be indicated by the minimum output
(0000000) , what will be the change in output to the valve when there is a change of 1 bit? Note: Show the
calculation steps on the provided exam sheet & select the correct answer. (2-Marks)
> A:
54.6800 mV
X B: 0.00545 V
X C: 0.0315 V
X D: 31.5200 V
7
A thermocouple gives an output of 0.3 mV for each degree change in temperature. What will be the word length
required when its output passes through an analogue-to-digital converter if temperatures from 0 to 200 C are to
be measured with a resolution of 0.5 C? Note: Show the calculation steps on the provided exam sheet & select
the correct answer. (2-Marks)
> A: 9 bits
X B:
11 bits
X C: 18 bits
X D: 8 bits
Lina Jameel Almolhem; StudentID:
181008
8
Select the graph that indicate a digital signal
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