1
MEEN 464 Midterm Questions and Correct
Answers
List the title and order of Labs 1-5
Ans✅✅: 1. Temp Measuring Devices
2. Linear/Radial Heat Conduction
3. Thermal Contact Conductance/Resistance
4. Steady 1-D Conduction for fins
5. Lumped Capacitance
Which is not an objective of lab 1?
a) To determine and compare the transient responses of temperature
measuring devices.
b)To determine and compare the steady state accuracies of temperature
measuring devices.
c) To determine the value of thermal conductivity of a solid medium
d)To conduct statistical uncertainty analyses with experimental data.
Ans✅✅: c
T-type thermocouples consist of _____.
Ans✅✅: Copper / Constantan
Which thermocouple will have the shortest time constant?
a) 30-gage T-type thermocouple with an exposed junction
b) Sheathed 0.25-inch diameter T-type thermocouple
c) Sheathed 0.25-inch diameter K-type thermocouple
d) Sheathed 0.125-inch diameter Ty-type thermocouple
Pretest - Stuvia US
, 2
Ans✅✅: a) 30-gage T-type thermocouple with an exposed junction
Overall uncertainty is defined as _____.
Ans✅✅: SQRT((bias limit)^2+(precision limit)^2)
A NIST calibrated thermometer show an air temp of 24.3 degC. A student used
alcohol thermometer to measure air temp shown below. What is the bias error
of the measurement with the alcohol thermometer?
20|=|=|=|=| | | | | | |30
Ans✅✅: 0.8 degC
From a temperature distribution, the Ti is 25 degC and Tf is 50 degC. At what
temperature is the time constant?
Ans✅✅: 40.8 degC
How do Resistance Temperature Detectors (RTD) measure the temperature?
Ans✅✅: The change in electrical resistance in pure metals as a
function of temperature
Use the given steady state temp measurements to calculate the precision limit
using 95% CL.
*C(95%,(N-1)=7) = 2.365
Reading | T (degC)
1 | 50.7
2 | 50.3
3 | 51.1
4 | 51.0
5 | 51.2
6 | 50.2
7 | 50.7
Pretest - Stuvia US
MEEN 464 Midterm Questions and Correct
Answers
List the title and order of Labs 1-5
Ans✅✅: 1. Temp Measuring Devices
2. Linear/Radial Heat Conduction
3. Thermal Contact Conductance/Resistance
4. Steady 1-D Conduction for fins
5. Lumped Capacitance
Which is not an objective of lab 1?
a) To determine and compare the transient responses of temperature
measuring devices.
b)To determine and compare the steady state accuracies of temperature
measuring devices.
c) To determine the value of thermal conductivity of a solid medium
d)To conduct statistical uncertainty analyses with experimental data.
Ans✅✅: c
T-type thermocouples consist of _____.
Ans✅✅: Copper / Constantan
Which thermocouple will have the shortest time constant?
a) 30-gage T-type thermocouple with an exposed junction
b) Sheathed 0.25-inch diameter T-type thermocouple
c) Sheathed 0.25-inch diameter K-type thermocouple
d) Sheathed 0.125-inch diameter Ty-type thermocouple
Pretest - Stuvia US
, 2
Ans✅✅: a) 30-gage T-type thermocouple with an exposed junction
Overall uncertainty is defined as _____.
Ans✅✅: SQRT((bias limit)^2+(precision limit)^2)
A NIST calibrated thermometer show an air temp of 24.3 degC. A student used
alcohol thermometer to measure air temp shown below. What is the bias error
of the measurement with the alcohol thermometer?
20|=|=|=|=| | | | | | |30
Ans✅✅: 0.8 degC
From a temperature distribution, the Ti is 25 degC and Tf is 50 degC. At what
temperature is the time constant?
Ans✅✅: 40.8 degC
How do Resistance Temperature Detectors (RTD) measure the temperature?
Ans✅✅: The change in electrical resistance in pure metals as a
function of temperature
Use the given steady state temp measurements to calculate the precision limit
using 95% CL.
*C(95%,(N-1)=7) = 2.365
Reading | T (degC)
1 | 50.7
2 | 50.3
3 | 51.1
4 | 51.0
5 | 51.2
6 | 50.2
7 | 50.7
Pretest - Stuvia US
