Our printable HVAC Basic Psychrometrics worksheet will help you get 100% ready for your coming exam

HVAC Basic

Fill in the blank. 
The <code>_________</code> of air is reached when the air reaches its moisture capacity.

- The saturation point of air is the point at which the air is holding the maximum amount of water vapor that it can hold at a given temperature and pressure. When the air reaches its saturation point, any additional water vapor will begin to condense into liquid form, which can lead to the formation of dew, fog, clouds, or precipitation.

 - The dew point, on the other hand, is the temperature at which air must be cooled in order for it to reach its saturation point and for condensation to occur.
 - The set point is a term used in control systems and refers to a desired or target value for a particular variable.

Gap filling. 
In summer, when the room is air conditioned, vapor pressure on the outside is <code>_________</code> than it on the inside.

In summer, when the room is air-conditioned, the vapor pressure on the outside is generally greater than on the inside. This is because air conditioning systems work by removing moisture from the air in the room, which lowers the vapor pressure inside. As a result, the outside air, which is often warmer and more humid, generally has a higher vapor pressure than the inside air. This is one of the reasons why air conditioning is effective at keeping us cool and comfortable during hot and humid summer weather.

What is the surface temperature of the average adults skin?

The surface temperature of the average adult's skin is approximately 80 degrees Fahrenheit (27 degrees Celsius). However, it's important to note that skin temperature can vary depending on the location on the body, level of physical activity, and environmental factors.

Is the following statement true or false? 
At 100% air saturation, wet-bulb temperature is equal to dry bulb-temperature.

At 100% air saturation, the air is holding the maximum amount of moisture it can at a particular temperature, which means that no more moisture can evaporate from a wet surface. This results in the wet-bulb temperature being equal to the dry-bulb temperature. This condition is known as the "wet-bulb depression" being zero.

Which of the following heat contents causes an increase in dry-bulb temperature?

Out of the options given, the heat content that causes an increase in dry-bulb temperature is the sensible heat content. Sensible heat is the heat that is added to or removed from a substance resulting in a change in its temperature but not in its phase.

 - Dew point temperature is the temperature at which the air would be saturated with water vapor and where condensation would occur, so it does not directly impact dry-bulb temperature.

 - Enthalpy is the total heat content of a substance, which includes both sensible and latent heat. While it is related to temperature, it does not directly cause an increase in dry-bulb temperature.

 - Latent heat is the heat absorbed or released during a change in phase, such as during evaporation or condensation. While it is an important factor in the overall heat balance of a system, it does not directly impact dry-bulb temperature.

A hygrometer is a device that is used to measure the amount of moisture or humidity in the air. It is commonly used in weather stations, greenhouses, and indoor spaces to monitor and control humidity levels. The other parameters you mentioned, such as air flow rate, enthalpy of the air, and latent heat of the air, require different types of instruments to measure.

Is the following statement true or false? 
The wet-bulb temperature can never be higher than the dry-bulb temperature.

The wet-bulb temperature is always equal to or lower than the dry-bulb temperature. The wet-bulb temperature is a measure of the lowest temperature that can be achieved through evaporative cooling, which occurs when water evaporates from a wet surface. The dry-bulb temperature, on the other hand, is a measure of the temperature of the air as measured by a regular thermometer.

Gap filling. 
In Psychrometric chart, lines of <code>_________</code> will run diagonally downward from left to right across the char.

- The lines that run diagonally downward from left to right across the psychrometric chart represent the lines of constant enthalpy. These lines are also known as the heat constant or the total heat lines. They represent the total amount of heat contained in a unit of moist air at a given condition, and they are useful in determining the amount of heat that needs to be added or removed from the air in order to achieve a desired condition.
 - Dry bulb temperature is represented by the horizontal lines.
 - Latent heat is represented by the diagonal lines that slope upward from left to right.
 - Relative humidity is represented by the curved lines that run from the bottom left to the top right of the chart.

Fill in the blank. 
The higher the temperature of the air is, the <code>_________</code> water vapor containing capacity of the air will be.

The higher the temperature of the air is, the higher water vapor containing capacity of the air will be.

This is because warm air can hold more water vapor than cold air. As the temperature of the air increases, the molecules in the air move faster, which increases the amount of water vapor that can be held in the air. Conversely, as the temperature of the air decreases, the amount of water vapor that can be held in the air decreases as well.

Is the following statement true or false? 
When the surrounding air is hotter than the skin temperature, the body will lose heat.

When the surrounding air is hotter than the skin temperature, the body will lose heat through a process called convection. Convection is the transfer of heat through the movement of a fluid, such as air or water. In this case, the warm air around the body will absorb heat from the skin and carry it away, causing the body to lose heat. This is why people often feel cooler when there is a breeze or when they are in a room with a fan or air conditioning, as these devices increase the flow of air around the body, facilitating heat loss.

Is the following statement true or false? 
Temperature determines the amount of water vapor that can be held by air.

Temperature is one of the main factors that determines the amount of water vapor that can be held by air. Warmer air can hold more water vapor than cooler air. This is because as the temperature of air increases, the molecules of air move faster and farther apart, which creates more space for water molecules to occupy. Conversely, as the temperature of air decreases, the molecules of air move slower and closer together, which leaves less space for water molecules to occupy.

Gap filling/ 
The greater the wet-bulb or dew point depression is, the <code>_________</code> the relative humidity will be.

When the wet-bulb or dew point depression is greater, it means that the dry-bulb temperature is higher relative to the wet-bulb or dew point temperature. This indicates that the air is drier, as the moisture in the air is evaporating more readily, resulting in lower relative humidity. Conversely, when the wet-bulb or dew point depression is smaller, it indicates that the air is more saturated with moisture, resulting in higher relative humidity.

Fill in the blank. 
In <code>_________</code>, the heat passes from one molecule to another while there is almost no noticeable movement of molecules.

Conduction is one of the three main methods of heat transfer, along with convection and radiation.

 In conduction, heat is transferred between two objects or substances that are in contact with each other. When there is a temperature difference between the two objects, the hotter object will transfer thermal energy to the cooler object through molecular collisions.

 This transfer of heat occurs because the hotter object has molecules that are vibrating at a higher frequency, and these high-energy molecules collide with the lower-energy molecules in the cooler object, transferring some of their energy to them. This process continues until the two objects reach thermal equilibrium, with both objects having the same temperature.

In what graphical form does a psychrometric chart typically present the properties of moist air?

A psychrometric chart typically presents both physical and thermal properties of moist air in a graphical form. The physical properties that are typically shown on a psychrometric chart include the dry-bulb temperature, wet-bulb temperature, dew point temperature, relative humidity, specific humidity, and enthalpy. The thermal properties that are typically shown on a psychrometric chart include the sensible heat and latent heat of the air-water vapor mixture.

Physical, Chemical and Thermal properties.

Gap filling. 
<code>_________</code> temperature measurement is an indication of air's moisture content.

- Wet-bulb temperature is the temperature recorded by a thermometer that has its bulb wrapped in a wet wick or cover. The wet-bulb temperature is lower than the dry-bulb temperature because of the cooling effect of evaporation, and it is often used in conjunction with the dry-bulb temperature to calculate relative humidity and other moisture-related parameters. 
 - The dew point is also a measure of air's moisture content, but it is not a temperature measurement. It is the temperature at which the air becomes saturated with water vapor and dew forms.

Gap filling. 
Vertical lines in Psychromteric charts show constant <code>_________</code> in degrees C or degrees F.

Vertical lines in Psychrometric charts show constant dry-bulb temperature in degrees Celsius or degrees Fahrenheit. Dry-bulb temperature is the temperature of the air measured by a regular thermometer, and it is one of the primary parameters used in psychrometry.

Gap filling. 
At the dew point temperature, wet-bulb temperature is <code>_________</code> dry-bulb temperature.

The dew point temperature is the temperature at which the air becomes fully saturated with water vapor, meaning that it cannot hold any more moisture. The wet-bulb temperature is the lowest temperature that can be achieved through evaporative cooling of a wetted wick over a thermometer bulb, and it is an indicator of the amount of moisture in the air.

 When the air is fully saturated, the wet-bulb temperature and the dew point temperature are equal, and both are equal to the dry-bulb temperature. This is because the air cannot hold any more moisture, so any further cooling will result in condensation, which is the process that creates dew and fog.

Which of the following temperatures is registered with normal thermometer?

Both dry-bulb temperature and wet-bulb temperature can be measured with a normal thermometer. The dry-bulb temperature is the temperature of the air measured with a standard thermometer without any moisture on its bulb, while the wet-bulb temperature is the temperature of the air measured with a thermometer that has its bulb covered with a wet wick or cloth. The difference between the dry-bulb temperature and the wet-bulb temperature can be used to determine relative humidity and other meteorological parameters.

Gap filling. 
Latent heat can be associated with <code>_________</code>.

- Latent heat is the energy required to change the state of a substance from one phase to another, such as from a liquid to a gas or from a solid to a liquid. In the case of wet heat, the latent heat is associated with the phase change of water from a liquid to a vapor, as occurs during evaporation or boiling. 
 - Dry heat, on the other hand, does not typically involve a phase change and therefore does not involve latent heat.

What is the comfort range of relative humidity for dry-bulb temperatures?

For a dry-bulb temperature range of 20-26°C (68-78.8°F), the comfort range of relative humidity is typically between 45-65% RH. This range is based on the ASHRAE Standard 55-2017, which specifies thermal environmental conditions for human occupancy and is widely referenced in building design and construction.

Free printable HVAC Basic Psychrometrics worksheet part 2

Millions Of Interactive & Printable Worksheets For Education

Create academic content for both online and offline classes

Create addition practice for both online and offline classes

The free, easy, and smart way to make your own custom worksheets with help from AI or converting PDF/ images to interactive worksheets that students can practice online.

Create a group, add your students, assign exercises (by using WorksheetZone's resources, creating a new one, or uploading your own PDF), and then share group link (or student codes) with your students.

Teachers Assign Tasks Quickly

Assign exercises digitally, score them, and follow all students' progress on any devices (computers, mobiles, tablets,...) and at anywhere you want!

After joining group by 1-click login link or entering student code, students will see their tasks. They then can complete them online on their own devices!

Students Do Task Online

Interactive Tasks will be automatically scored. Teachers now can track and follow students' progress right on their phones or desktops.

Teachers Easily Track Results

Find a various coloring pages for multiple topics and ages

Spend less time, work more effectively with our comprehensive education supportive platform

Create worksheets from scratch just as easy as with Canva, no more Premium Elements

Create crossword activities with AI generator for both online and offline class

Spend less time, work more effectively with our all-in-one Education Management Platform

Create division practice for both online and offline classes

Create quick end-of-lesson questions to check student understanding

Create fill in the blank exercises for both online and offline classes

Millions of attractive and useful worksheets available for teachers & students

Browse & Save Millions Of Worksheets

Assign tasks, auto score, follow students progress with all-in-one class management tool

Manage & Track Students' Progress

Instantly create quiz questions from any YouTube video

Design engaging group work instructions tailored for classroom use

Create handwriting activities with just some clicks

Generate step-by-step classroom ice-breaker instructions

Produce structured informational passages with ease and accuracy

Create online interactive worksheet with AI assistant for distance learning

Diverse resources (worksheets, <a href='/coloring-pages' target='_blank'>coloring pages</a>, <a href='/lesson-plan' target='_blank'>lesson plans</a>) for all grades and subjects

Easily to find what you want with detailed filters

The resources are high quality and comply with core common standards, created by education experts

Digital materials can be interactively used and automatically graded

Browse Millions Of High Quality Educational Resources

Easily make any worksheets with <a href='/worksheet-maker' target='_blank'>our worksheet maker</a>

Quickly create online quizzes and puzzles like word search, crossword, or handwriting,... with comprehensive toolsets empowered by AI assistants

Conveniently transform traditional paper and classwork to engaging online activities

Make Worksheets Quickly And Innovatively

Host activities to maintain focus and increase engagement for the students

Keep students interested with interactive lessons

Encourage students to work together and communicate

Use multimedia and interactive displays to create a lively learning environment

Host Activities For The Class

Easily manage classworks and results

Track students’ progress closely

Suggest customized learning path for each students with specialized AI assistants

Reuse classes' information conveniently when leveling up or easily applied to other classes.

Manage After-Class Tasks With Paper-Alike Experience

Find thousand of ready-to-use lesson plan

Create lesson plan for both online and offline classes

Create math crossword activities for both online and offline classes

Create multiplication practice for both online and offline classes

Create name-tracing sheet for class opening activities with just a click

Generate reading comprehension texts, passage for any topics, subjects...

Generate reading passage for any topics, subjects...

Build detailed grading rubrics quickly with clear scoring criteria

Use natural language to find desired resources

Transform printable resources into live worksheets.

Convert PDF To Digital

Select a worksheet <a href='https://worksheetzone.org/worksheets/quiz'>(Quiz or Interactive format)</a> or <a href='https://worksheetzone.org/worksheet-maker'>Generate a new worksheet</a>

Click “Assign” and configure time, attempts, and feedback settings

Share the assignment via link, code, QR, or platforms like Google Classroom

Monitor student progress live from your assignment dashboard

Easily assign worksheets from your library or custom creations. Monitor individual student progress and performance in real time.

Assign Online Exercises

Host live games with interactive worksheet

Select a worksheet (Quiz or Interactive format) and click “Start teaching activities”

Choose desired mode and configure timing, question order, scoring, etc.

Share the session via code or link for students to join

Start the session and monitor progress and stats live

Host real-time, interactive sessions with any quiz-based worksheet. Learn together through friendly competition.

Increase Interactivity During Classes

Select a worksheet and click “Self-paced Learning”

Configure number of questions, timing, and feedback settings

Students practice independently on any device

Submit the assignment to view scores and leaderboard ranking

Let students learn at their own pace with custom questions, time limits, auto-scoring, and motivational leaderboards.

Personalized learning suggestions

AI-powered insights —all in one centralized dashboard

Add topics and assign worksheets inside the Activity tab

Monitor each student’s progress and completion

Use AI suggestions to improve teaching strategies and personalize assignments

Turn every worksheet into a personalized learning journey. Assign in 1 minute, track in real time, and teach with AI-powered insights by your side.

Worksheetzone Classroom

Features

How it works

Create Sentence Scramble activities with AI generator for both online and offline class

<ul><li> Easily Find and Create teaching materials</li></ul>

<ul><li> Make Learning Fun and Effective by turning traditional lessons into quizzes and games</li></ul>

<ul><li> Save Time and Professionally Manage after-class tasks</li></ul>

Printable & interactive resources with instant download. Worksheets, coloring pages, lesson plans, and AI-powered tools for every grade and subject.

Everything teachers and learners need in one powerful platform

Create subtraction practice for both online and offline classes

Worksheetzone: Easy Solution For Teaching & Learning

Create new or edit available worksheets in just a few clicks, and the rest let AI do!

Create New Or Customize Templates

Easy Solution For Teaching & Learning

Create vocabulary list for both online and offline classes

Create Word Scramble activities with AI generator for both online and offline class

Create word search activities with AI generator for both online and offline class

Generate clear wrap-up instructions to end your lesson effectively

AI-powered suggestions to improve clarity, grammar, and flow

View, edit & interact with this in A4 form

Free printable HVAC Basic Psychrometrics worksheet part 2

Other similar worksheets