Deck 11: Temperature and Temperature-Related Variables in Engineering

Question 1

Temperature is a fundamental dimension.

Answer 1

True

Question 2

Material properties are not a function of temperature.

Answer 2

False

Question 3

Which of the following material properties varies with temperature?

A)density
B)viscosity
C)electrical resistance
D)all of the above

Answer 3

D

Question 4

Which of the following temperature scales is known as an absolute scale?

A)Rankine
B)Kelvin
C)all of the above

Question 5

Convert to Kelvins

Question 6

What does V stand for in the following equation (ideal gas law)?

A)Volume
B)Velocity
C)Voltage
D)Viscosity

Question 7

A temperature-measuring device that consists of two dissimilar metals is known as a

A)Thermocouple
B)Thermistor
C)Thermojunction
D)RTD

Question 8

The Kelvin and Rankine scales are based on the behavior of an ideal gas.

Question 9

A temperature-measuring device composed of a semiconductor material is known as a

A)Thermocouple
B)Thermistor
C)Thermojunction
D)RTD

Question 10

What does T stand for in the following equation (ideal gas law)?

A)Time
B)Period
C)Torque
D)Temperature

Question 11

Temperature is a macroscopic measurement of a microscopic phenomenon.

Question 12

Convert to Celsius

Question 13

The physical quantity that quantifies or provides a measure of how active molecules are on a microscopic level is

A)density
B)temperature
C)viscosity
D)specific weight

Question 14

Convert to Fahrenheit

Question 15

Civil engineers must design the structures in such a way as to allow for expansion and contraction of materials, such as concrete and steel that occur due to changes in the surrounding temperatures.

Question 16

The physical quantity that provides a measure of molecular activity and the internal energy of an object is

A)density
B)temperature
C)viscosity
D)specific weight

Question 17

What does P stand for in the following equation (ideal gas law)?

A)Pounds
B)Pressure
C)Power
D)Permeability

Question 18

Thermometers use varying physical properties to measure temperature.Which of the following variable physical properties are utilized in thermometers?

A)expansion
B)electrical resistance
C)color
D)all of the above

Question 19

Which of the following temperature scales is known as an absolute scale?

A)Fahrenheit
B)Celsius
C)Centigrade
D)Kelvin

Question 20

Convert to Kelvins

Question 21

The R-value or R-factor of a material provides a measure of resistance to heat flow: The higher the value, the less resistance to heat flow the material offers.

Question 22

Thermal conductivity is a property of materials that shows how good the material is in transferring thermal energy (heat) from a high-temperature region to a low-temperature region within the material.

Question 23

When using the ideal gas law, , what system of units should you use when entering temperature values?

A)Fahrenheit
B)Celsius
C)Kelvin
D)any of the above

Question 24

The amount of heat required to raise the temperature of of water by is known as a

A)Btu
B)calorie
C)Calorie
D)Joule

Question 25

What is the SI unit of thermal energy?

A)Calorie
B)Watt
C)Btu
D)Joule

Question 26

The temperature in this room is .The temperature outside the building is .What is the temperature difference in degrees Celsius?

A)
B)
C)
D)

Question 27

Before taking a bite of a piece of hot pizza you blow on it to cool it.What mode of heat transfer are you using in this situation?

A)conduction
B)convection
C)radiation
D)none of the above

Question 28

What does Btu stand for?

A)British temperature unit
B)British thermal unit
C)British thermocouple unit
D)Binary temperature unit

Question 29

A temperature difference in Celsius is equal to a temperature difference in Kelvin.

Question 30

For both the forced and the free convection situations, the overall heat transfer rate between the fluid and the surface is governed by Fourier's law of cooling.

Question 31

The energy content of food is typically expressed in Calories, which is equal to 1000 calories.

Question 32

All matter emits thermal radiation.This rule is true as long as the body in question is at a nonzero absolute temperature.

Question 33

The mode of heat transfer that occurs when a fluid in motion comes into contact with a solid surface whose temperature differs from the moving fluid is known as

A)conduction
B)convection
C)radiation
D)none of the above

Question 34

The amount of heat required to raise the temperature of 1 lbm of water by is known as a

A)Btu
B)calorie
C)Calorie
D)Joule

Question 35

Heat flows naturally from a hot object to a cold objects.

Question 36

A temperature difference in Celsius is equal to a temperature difference in Fahrenheit.

Question 37

Which of the following is NOT a mode of heat transfer?

A)transposition
B)convection
C)radiation
D)conduction

Question 38

When you touch a hot object with your finger, the heat transferred to your finger is by

A)conduction
B)convection
C)radiation
D)none of the above

Question 39

The temperature in a room is .The temperature outside the building is .What is the temperature difference in Kelvins?

A)52 K
B)11 K
C)20 K
D)29 K

Question 40

The mode of heat transfer that occurs when a temperature difference exists in a medium is known as

A)conduction
B)convection
C)radiation
D)none of the above

Question 41

A degree-day (DD) is the difference between 18°C (typically) and the average temperature of the outside air during a 24-hour period.

Question 42

In general, as the temperature of a material is increased, the material's length will

A)increase
B)decrease
C)remain the same

Question 43

The physical measurement that is intended to account for the combined effect of wind speed and air temperature is known as

A)Dew point
B)Ambient conditions
B)Relative temperature
C)Wind chill index

Question 44

The energy released by fuel when the combustion by-products include water in vapor form is known as the

A)higher heating value
B)lower heating value
C)all of the above
D)none of the above

Question 45

How much energy is required to raise the temperature of of aluminum from to ?

Question 46

A steel bridge is 150 m long when the temperature is .By how much will its length increase when the temperature is ? (Steel has a coefficient of linear expansion of

Question 47

You wish to make a large cup of tea.How much energy is needed to raise the temperature of 500 ml of tap water from to ?

Question 48

If you stay out too long at the beach you may get a sunburn as a result of too much heat being transferred to your skin.What mode of heat transfer is responsible for this?

A)conduction
B)convection
C)radiation
D)none of the above

Question 49

In general, as the temperature of a material is increased, the material's volume will

A)increase
B)decrease
C)remain the same

Question 50

Most conventional fuels that we use today to generate power come from coal, natural gas, oil, or gasoline.

Question 51

A unit commonly used to express the metabolic rate for an average person under sedentary conditions is called

A)metabavg
B)mravg
C)met
D)msed

Question 52

A unit that is generally used to express the insulating value of clothing is called

A)clo
B)ciu
C)cins
D)ivc

Question 53

The energy released by fuel when the combustion by-products include water in liquid form is known as the

A)higher heating value
B)lower heating value
C)all of the above
D)none of the above

Question 54

The physical quantity that provides a quantitative way to show how much thermal energy is required to raise the temperature of an object by a certain amount is

A)thermal conductivity
B)specific heat
C)specific weight
D)density

Question 55

The term that is used to quantify the amount of energy that is released when a unit mass or a unit volume of fuel is burned is known as

A)heating value
B)specific heat
C)specific mass
D)specific volume