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WorksheetsChapter 4 Process Measurements and Instrumentations
Total questions: 10
Worksheet time: 9mins
What is the name of the sensor as shown in the picture.
Differential pressure sensor
Ultrasonic sensor
Float sensor
Bubble sensor
How does bubble sensor works in measuring the liquid level?
The time required for an ultrasonic wave emitted by a transducer and reflected off the surface of the liquid to return to the transducer, thus determining the liquid level
The differential pressure and density of the liquid, can obtain the liquid level
The force required to keep the float in place is proportional to the liquid level.
The pressure required to produce the continuous stream of bubbles can measure the liquid level.
What are the special features of level sensor?
I. Measurement can be accomplished without touching the liquid
II. There are no moving parts
III. Small and light
I and II
I, II and III
II and III
I and III
Which statement is correct about working principles of Resistance Temperature Devices (RTD) ?
I. Determine the temperature by measuring electrical resistance
II. Two different metals expand at different rates as they warm up.
III. The metal expand with temperature
IV. The electrical resistance of pure metals increases with increase in temperature.
I, II and III
I and II
II and III
I and IV
What are the conditions that may prevent the usage of orifice meter for flow rate measurement in pipeline?
I. Not enough available pressure drop e.g gravity flow
II. Fluid that far from their saturated vapor pressure
III. Flow of corrosive fluid
IV. Fluids with suspended solids
I and II
I, III and IV
II and III
III and IV
What is the name of the measurement?
Strain Gauge Sensor
Bellows-Type Sensor
Bourdon Tube Sensor
U-Tube Manometer
Which statement is correct about the working principle of Bourdon Tube Sensor?
I. When pressure is applied to the inside of the tube, the sealed end of the tube will tend to straighten out, which will cause a small amount of movement at the sealed end of the tube (expansion).
II. U-shaped tube half-full of liquid, one side of which is connected to the region of interest while the reference pressure (which might be the atmospheric pressure or a vacuum) is applied to the other.
III. This movement can be amplified directly by gears and a pointer to make a direct-reading pressure gauge
IV. The difference in liquid level represents the applied pressure
I and II
I and III
II and III
II and IV
What is the temperature range of thermocouple?
-200 to 1400 °C
0 to 1400 °C
0 to 1000 °C
200 to 1400 °C
Which one is NOT the advantage of bellow-type sensor?
Moderate cost
Adaptability for absolute and differential pressure
Limited availability of metals and work hardening of some of them
Delivery of high force
Which one is NOT the disadvantage of Diaphragms Sensor?
Lack good vibration and shock resistance
Difficult to repair.
Limited to relatively low pressures
Cost is moderate.
