EDJ27203 Quiz 2 Set 1

Q1. An RTD is rated as Pt100 (R0​=100Ω) with α=0.00385/∘C. If RT​=115Ω, calculate the temperature (T) in ∘C.

• 38.5∘C
• 15∘C
• 38.96∘C
• 150∘C

Q2. For an NTC thermistor, how does its electrical resistance behave as the measured temperature increases?

• Resistance increases proportionally
• Resistance remains constant
• Resistance decreases
• Resistance increases non-linearly

Q3. A process temperature sensor measures 55∘C. Convert this temperature to the Kelvin (K) scale.

• 328 K
• 218.15 K
• 328.15 K
• 300 K

Q4. An RTD has RT1​=100Ω at T1​=0∘C and α=0.00392/∘C. Calculate its resistance (RT2​) at 50∘C.

• 100Ω
• 101.96Ω
• 119.6Ω
• 139.2Ω

Q5. Which sensor is preferred for high linearity over a wide range, despite being expensive and having lower sensitivity than a thermistor?

• Thermistor (NTC)
• Resistance Temperature Detector (RTD)
• Thermocouple (Type K)
• Liquid column thermometer

Q6. Which thermocouple group is known for being expensive, having high stability, and long life at high temperatures?

• Type J
• Base Metal Thermocouples
• Noble Metal Thermocouples
• Type T

Q7. The maximum operating temperature of a lubricant is 356∘F. What is this temperature in Celsius (∘C)?

• 100∘C
• 150∘C
• 180∘C
• 200∘C

Q8. Define Stress (σ) in the context of material mechanics.

• Change in length divided by original length
• Measure of a solid's stiffness
• Force applied per unit cross-sectional area
• Amount of deformation or displacement

Q9. Define Strain (ϵ) and state its calculation formula.

• Force divided by area (σ=F/A)
• Stress divided by Young's Modulus (ϵ=σ/E)
• Change in dimension divided by the original dimension (ϵ=Δl/l)
• Resistance change divided by Gauge Factor

Q10. A high value of Young's Modulus indicates what about a solid material?

• The material is very elastic and flexible
• It experiences large deformation under a given load
• The material is inelastic or stiff
• The material has a high coefficient of thermal expansion