Test 1 november 2011 page 1

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This document appears to be a test from a university in Malaysia. It contains 6 questions related to electrical engineering topics. Question 4 asks about factors to consider when designing a waste water treatment monitoring system for a textile factory involving level, flow, and temperature measurements. Question 5 provides information about a platinum resistance thermometer and asks to determine the temperature of a hot gas based on its resistance. Question 6 asks about the working principle of a bimetallic strip thermostat and how it can be used for temperature control in a baking oven.

Technology Business

Faculty of Electrical Engineering
Universiti Teknologi Malaysia
81310 UTM Skudai, Johor
@IITM
RESEARCH UNIVERSITY
sEI41s3".
TEST I (10 %)
IttNovember 2011

4. You are an engineer working in a waste water treatment company. You are given a task to design
a waste water treatment monitoring system for a textile factory that will involve level, flow and
temperature measurements. Upon providing the chosen transducers, please state three factors that
you will take into serious consideration before researching on possible transducers to be used for
the designed system. (6 Marks)

5. A platinum resistance thermometer has a resistance of 140.5 f,) and 100 O at 100 "C and 0'C,
respectively. tf its resistance becomes 305.3 O when it is in contact with a hot gas, determine the
tglqperature of the gp. The temperature coefficient, o of platinum is 0.0039 f C. I Equatiop
needed: R.z: Rr + cRo (tz-tr)] (4 Marks)

6. Explain the working principle of bimetallic strip thermostat and also how can be used in baking
oven for temperature control operations. (6 Marks)

iT

a:
t
ii

20tt/2012 -I Prof. Dr. Ruzairi Abdul Rahim
Dr. Leow Pei Ling

,FJ

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Test 1 november 2011 page 1

1. Faculty of Electrical Engineering Universiti Teknologi Malaysia 81310 UTM Skudai, Johor @IITM RESEARCH UNIVERSITY sEI41s3". TEST I (10 %) IttNovember 2011 4. You are an engineer working in a waste water treatment company. You are given a task to design a waste water treatment monitoring system for a textile factory that will involve level, flow and temperature measurements. Upon providing the chosen transducers, please state three factors that you will take into serious consideration before researching on possible transducers to be used for the designed system. (6 Marks) 5. A platinum resistance thermometer has a resistance of 140.5 f,) and 100 O at 100 "C and 0'C, respectively. tf its resistance becomes 305.3 O when it is in contact with a hot gas, determine the tglqperature of the gp. The temperature coefficient, o of platinum is 0.0039 f C. I Equatiop needed: R.z: Rr + cRo (tz-tr)] (4 Marks) 6. Explain the working principle of bimetallic strip thermostat and also how can be used in baking oven for temperature control operations. (6 Marks) iT a: t ii 20tt/2012 -I Prof. Dr. Ruzairi Abdul Rahim Dr. Leow Pei Ling ,FJ

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