NEW
Font size
S
M
L
XL
WorksheetsEDJ27203 Quiz 2 Set 1
Total questions: 16
Worksheet time: 25mins
Name
Class
Date
1.
Q1. An RTD is rated as Pt100 (R0=100Ω) with α=0.00385/∘C. If RT=115Ω, calculate the temperature (T) in ∘C.
a)
38.5∘C
b)
15∘C
c)
38.96∘C
d)
150∘C
2.
Q2. For an NTC thermistor, how does its electrical resistance behave as the measured temperature increases?
a)
Resistance increases proportionally
b)
Resistance remains constant
c)
Resistance decreases
d)
Resistance increases non-linearly
3.
Q3. A process temperature sensor measures 55∘C. Convert this temperature to the Kelvin (K) scale.
a)
328 K
b)
218.15 K
c)
328.15 K
d)
300 K
4.
Q4. An RTD has RT1=100Ω at T1=0∘C and α=0.00392/∘C. Calculate its resistance (RT2) at 50∘C.
a)
100Ω
b)
101.96Ω
c)
119.6Ω
d)
139.2Ω
5.
Q5. Which sensor is preferred for high linearity over a wide range, despite being expensive and having lower sensitivity than a thermistor?
a)
Thermistor (NTC)
b)
Resistance Temperature Detector (RTD)
c)
Thermocouple (Type K)
d)
Liquid column thermometer
6.
Q6. Which thermocouple group is known for being expensive, having high stability, and long life at high temperatures?
a)
Type J
b)
Base Metal Thermocouples
c)
Noble Metal Thermocouples
d)
Type T
7.
Q7. The maximum operating temperature of a lubricant is 356∘F. What is this temperature in Celsius (∘C)?
a)
100∘C
b)
150∘C
c)
180∘C
d)
200∘C
8.
Q8. Define Stress (σ) in the context of material mechanics.
a)
Change in length divided by original length
b)
Measure of a solid's stiffness
c)
Force applied per unit cross-sectional area
d)
Amount of deformation or displacement
9.
Q9. Define Strain (ϵ) and state its calculation formula.
a)
Force divided by area (σ=F/A)
b)
Stress divided by Young's Modulus (ϵ=σ/E)
c)
Change in dimension divided by the original dimension (ϵ=Δl/l)
d)
Resistance change divided by Gauge Factor
10.
Q10. A high value of Young's Modulus indicates what about a solid material?
a)
The material is very elastic and flexible
b)
It experiences large deformation under a given load
c)
The material is inelastic or stiff
d)
The material has a high coefficient of thermal expansion
11.
Q11. A 20mm×25mm steel bar is subjected to F=75kN. Calculate the resulting Stress (σ) in N/m2 (Pa).
a)
150×103N/m2
b)
75×106N/m2
c)
150×106N/m2
d)
37.5×106N/m2
12.
Q12. A wire with original length (l) of 4 meters is stretched by Δl=3cm. Calculate the resulting Strain (ϵ) in microstrain (μϵ).
a)
0.0075μϵ
b)
75μϵ
c)
750μϵ
d)
7500μϵ
13.
Q13. A strain gauge has R=120Ω and GF=2. What is the change in resistance (ΔR) when the gauge experiences a strain (ϵ) of 500μϵ?
a)
0.12Ω
b)
0.024Ω
c)
1.2Ω
d)
0.0012Ω
14.
Q14. A steel rod with E=200×109N/m2 has σ=120×106N/m2. Calculate the resulting Strain (ϵ).
a)
0.006
b)
0.0006
c)
1.67×103
d)
600×10−9
15.
Q15. A 10kΩ NTC thermistor is at 25∘C. If the temperature drops to 10∘C, will its resistance RT be greater than or less than 10kΩ?
a)
Greater than 10kΩ
b)
Less than 10kΩ
c)
Exactly 10kΩ
d)
Cannot be determined
16.
Q16. What is the condition for a Wheatstone bridge used with strain gauges to be balanced (Vo=0)?
a)
All four resistors must be active strain gauges
b)
The bridge is connected to an operational amplifier
c)
The ratio of resistances is equal (R1/R4=R2/R3)
d)
The supply voltage (Vs) is maximized
Reset
