30 Questions
What is the primary purpose of the porcelain insulator in a resistance thermometer?
To provide electrical insulation between the platinum wire and the metal sheath
What is the effect of temperature change on the platinum wire in a resistance thermometer?
It increases the wire's resistance proportionally
What is the temperature range of a resistance thermometer?
-200 to 650°C
What is the advantage of a resistance thermometer over other temperature measurement instruments?
High accuracy and fast response
What is the principle behind the working of a thermocouple?
Thermoelectric effect
What is the primary material used in the construction of the C-type Bourdon tube pressure gauge?
Phosphor bronze
What is the disadvantage of using a bridge circuit with a resistance thermometer?
Result in slight inaccuracy due to current flowing through the bridge circuit
What is the purpose of the linkage and lever mechanism in the C-type Bourdon tube pressure gauge?
To operate the pointer
What happens to the shape of the Bourdon tube when the fluid under pressure enters it?
It changes from oval to circular
What is the purpose of the multiplication adjustment in the Bourdon tube?
To match the linear tip movement with the rotational pointer movement
What is the effect of a shorter lever on the Bourdon tube's operation?
It increases the rotation of the pointer for the same amount of tip travel
How is the pressure connection made in the C-type Bourdon tube pressure gauge?
Through a socket at the base of the tube
What is the primary function of a strain gauge?
To convert mechanical displacement into a change of resistance
What is the purpose of a Wheatstone bridge in a strain gauge circuit?
To convert the resistance change into a voltage
What is the difference between bonded and unbonded strain gauges?
Bonded strain gauges are attached to a structure, while unbonded strain gauges are not
What happens to the wire in a bonded strain gauge when the surface is disturbed?
The resistance of the wire changes
What is the limitation of the armature movement in an unbonded strain gauge?
It can move only in one direction
What is the material used to bond the paper sheet to the structure in a bonded strain gauge?
Adhesive material
What is the function of the LVDT in the given setup?
To convert ring deflection into a voltage signal
How do the strain gauges in the strain gauge load cell react to the applied force?
They decrease in length and increase in cross-sectional area
What is the purpose of the Rtc in the strain gauge load cell?
To compensate for the difference in temperature coefficient of resistance of four strain gauges
What is the advantage of LVDTs mentioned in the text?
They have relatively high output signal levels and high accuracies
What is the function of the external bosses A and B in the given setup?
To apply force to the ring
What is the purpose of the balancing of the Wheatstone bridge in the strain gauge load cell?
To provide a linear output voltage with respect to the applied force
What is the main reason for converting analog signals to digital signals?
To facilitate processing by the microcontroller
Which type of ADC is commonly used in general-purpose industrial applications?
Successive approximation
What is the primary function of an analog-to-digital converter (ADC)?
To convert analog signals to digital signals
What is the characteristic of analog signals in terms of their range of values?
Infinite range of values
What is the purpose of the 'Wait' step in the analog-to-digital conversion process?
To allow the voltage to stabilize
Which of the following is an example of a physical signal that is typically analog?
Temperature
This quiz covers the components of pressure measurement instruments, including pocket closure cups, bobbins, and pressure gauges. Learn about the construction and working of C-type Bourdon tube pressure gauges and more.
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