# CDC 3E151B : Heating, Ventilation, And Refrigeration! Hardest Trivia Quiz

100 Questions | Total Attempts: 740  Settings  Have you just finished the CDC 3E151B course on Heating, Ventilation, And Refrigeration? What is a better way there to see how attentive you are than showing off how much you learned? Take up this quiz and review what you learned. Be sure to post your score to see how you fair among others. All the best of luck!

• 1.
Anything that has weight and takes up space is
• A.

Energy

• B.

Matter

• C.

Motion

• D.

Atoms

• 2.
What is the relationship among matter, energy, and heat?
• A.

Energy is made up of atoms, which consists of electrons kept in motion by matter, which is a form of heat

• B.

Heat is made up of molecules, which consists of electrons kept in motion by energy, which is a form of matter

• C.

Matter is made of atoms, which consists of electrons kept by heat, which is a form of energy

• D.

Energy is made up of molecules, which consists of electrons kept in motion by heat, which is a form of matter

• 3.
Conduction is the transfer of heat
• A.

Similar to that of light waves and radio waves

• B.

By the movement of a fluid such as air or water over a substance

• C.

Where a fan is used to propel the air across a hot or cold surface

• D.

Through a substance or from one body to another when the bodies are in direct contact

• 4.
What form of heat transfer most commonly used in the HVAC indusrty is
• A.

Conduction

• B.

Convection

• C.

• D.

• 5.
Sensible heat added to a substance will be indicated by a
• A.

Drop in temperature of that substance

• B.

Change in physical state of the substance

• C.

Stable temperature of that substance

• D.

Rise in temperature of that substance

• 6.
The heat that changes water at 212* F to steam at 212*F is known as
• A.

Latent heat of vaporization

• B.

Latent heat of condensation

• C.

Sensible heat of vaporization

• D.

Sensible heat of condensation

• 7.
Which is the correct formula for converting Fahrenheit to Celsius?
• A.

F = (C x 1.8) + 32

• B.

F = (C x 1.8) - 32

• C.

C = (F - 32) / 1.8

• D.

C = (F + 32) / 1.8

• 8.
What is the specific volume of one pound of dry air at standard conditions?
• A.

13.33 cubic feet

• B.

0.016 cubic feet

• C.

29.92 inches mercury

• D.

62.4 pounds/cubic foot

• 9.
To the closest tenth, what is normal atmospheric presure sea level?
• A.

11 psi

• B.

14.7 psi

• C.

110 psi

• D.

340 psi

• 10.
Where would you likely find the fasest moving air within a duct?
• A.

Along the walls

• B.

At the top

• C.

At the bottom

• D.

In the center

• 11.
Saturated steam is steam
• A.

• B.

At a temperature below boiling water

• C.

At a temperature above boiling water

• D.

At the temperature of boiling water

• 12.
To begin a plotting procedure on the psychometric chart, you must know the
• A.

Grains of moisture and specific heat

• B.

Dewpoint and wet-bulb temperatures

• C.

Wet-bulb and dry-bulb temperatures

• D.

Dry-bulb and dewpoint temperatures

• 13.
Heat content i plotted on the psychometric chart by extending the
• A.

Relative humidity line

• B.

Dew point line

• C.

Dry-bulb line

• D.

Wet-bulb line

• 14.
Refer to figure 1-10. If the wet-bulb temperature is 57*F and the dry-bulb temperature is 65*F, what is the relative humidity?
• A.

57 percent

• B.

61 percent

• C.

65 percent

• D.

70 percent

• 15.
Which process follows the line of constant enthalpy or has no heat change?
• A.

Latent heat process

• B.

Sensible heat process

• C.

Moisture injection process

• D.

• 16.
The term for temperature control that uses no external source of energy is
• A.

Pneumatic

• B.

Electronic

• C.

Self-contained

• D.

Electromechanical

• 17.
Hot-water reset is an example of what type of contol loop?
• A.

Open

• B.

Closed

• C.

Combination

• D.

Reverse reset

• 18.
What is a typical application of floating control?
• A.

Static pressure in a variable air volume system

• B.

Controlling temperature in a laboratory

• C.

Hot water reset from outdoor air

• D.

Room and discharge

• 19.
What mode of control corrects the problem of offset?
• A.

Proportional-plus-integral

• B.

Proportional-with-reset

• C.

Proportional

• D.

Floating

• 20.
Use the following information to answer this question about a pneumatic sensor: What is the output pressure of a pneumatic sensor with a range of 0* to 100* F if the temperature measured is 24*F?
• A.

3.52 psi

• B.

5.88 psi

• C.

9.20 psi

• D.

11.60 psi

• 21.
Use the following information to answer this question about a pneumatic sensor: What is the output pressure of a pneumatic sensor with a range of  50* to 100* F if the temperature measured is 80*F?
• A.

3.0 psi

• B.

8.6 psi

• C.

9.4 psi

• D.

10.2 psi

• 22.
Use the following information to answer this question about a single-input pneumatic controller: What is the proportional band required to obtain the desired performance?
• A.

5 percent

• B.

10 percent

• C.

15 percent

• D.

20 percent

• 23.
Use the following information to answer this question about a single-input pneumatic controller: What is the ouput of the contoller at 70*F?
• A.

3 psi

• B.

8 psi

• C.

10 psi

• D.

13 psi

• 24.
After you have drawn the performance graph for calibrating a single-input controller, what must you do next?
• A.

Find the transmitting pressure for both corners and the set point

• B.

Use a simulator in place of both sensors

• C.

Set the proportional

• D.

• 25.
What is the last step in the calibration of a single-input pneumatic controller?
• A.

Adjust the calibration screw to equal the predicted output pressure

• B.

Adjust the sensors to the predicted output pressures

• C.

Disconnect the sensor simulators

• D. Back to top