4TH CLASS PART A POWER ENGINEERING - INSTRUMENTATION FINAL REVIEW 2025 QUESTIONS AND ANSWERS

4TH CLASS PART A POWER ENGINEERING -
INSTRUMENTATION FINAL REVIEW 2025
QUESTIONS AND ANSWERS



Flow is proportional to:

Select one:

a. the square root extractor

b. pressure differential

c. the square root of the temperature differential

d. the square root of the pressure differential


e. a constant head - CORRECT ANSWER✔️✔️-d


A capillary is the name given to:

Select one:

a. the bulb holding the fluid of a filled thermometer

b. the line attached to the measuring junction of a thermocouple

c. a tube with a small uniform bore

d. the key part of a thermistor



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,e. a unit used only in refrigeration - CORRECT ANSWER✔️✔️-c


Thermo wells are:




Select one:

a. Used in pipes only

b. Not used with thermocouples

c. Used to protect the bulb from erosion, corrosion and impact

d. Used in conjunction with a capillary tube


e. Made of soft material - CORRECT ANSWER✔️✔️-c


Which flowmeter has a ball-like structure with a small shaft in the centre?

Select one:

a. nutating disc

b. rotary meter

c. magnetic flowmeter

d. target flowmeter


e. rotameter - CORRECT ANSWER✔️✔️-a


Flow inside a pipeline can differ considerably. Normal flow is referred to as:

Select one:




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,a. transitional

b. laminar

c. segmental

d. lunar


e. turbulent - CORRECT ANSWER✔️✔️-b


What is not a characteristic of a radiation detector?

Select one:

a. radiation source is usually uranium

b. high in cost with special handling requirements

c. needs a lead-lined stainless steel container

d. special precautions must be taken


e. radiation received from the source is an indication of the level - CORRECT ANSWER✔️✔️-a


Another name for a variable area meter is:

Select one:

a. nutating disc

b. pressurized bubbler

c. atmospheric bubbler

d. target flowmeter




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, e. rotameter - CORRECT ANSWER✔️✔️-e


On a thermocouple the joined end is called the:

Select one:

a. proportional connection

b. none of the answers

c. measuring junction

d. thermowell


e. reference junction - CORRECT ANSWER✔️✔️-c


To get more rotation of a pointer, the bimetal strip would be made ----------.

Select one:

a. shorter

b. in the form of a helix

c. longer

d. thicker


e. thinner - CORRECT ANSWER✔️✔️-b


Which flowmeter gives the least pressure loss?

Select one:

a. Pitot tube




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