NEW MEXICO JUNIOR COLLEGE
|A.||Course Title:||Mechanical Science|
|B.||Course Number:||ENGT 223B - 30555|
|J.||Office Hours:|| Virtual Monday: 8:00:00 AM-8:00:00 PM (MST);
Virtual Tuesday: 8:00:00 AM-8:00:00 PM (MST);
Virtual Wednesday: 8:00:00 AM-8:00:00 PM (MST);
Virtual Thursday: 8:00:00 AM-8:00:00 PM (MST);
Virtual Friday: 8:00:00 AM-8:00:00 PM (MST);
Virtual Saturday: 8:00:00 AM-8:00:00 PM (MST);
(770) 973-3369 (H) Between 8AM to 8PM (Mountain Time); Anytime in an emergency.
|K.||Time Zone:||Mountain Time|
3 Credit Hours This course presents the basics of mechanical components, diesel engines, heat exchangers, pumps, and valves. Students will have the opportunity to understand the construction and operation of mechanical components associated with various energy industry facility and equipment operations and maintenance.
This course will meet the requirements of the Energy Technology Degree at New Mexico Junior College; however, it is important to check with the institution to which you are planning to transfer to determine transferability. All students are encouraged to keep the course syllabus, as it will help determine the transferability of this course credit to another institution.
DOE HANDBOOK Mechanical Science Volume 1 of 2 (provided by instructor)
DOE HANDBOOK Mechanical Science Volume 2 or 2 (provided by instructor)
DOE HANDBOOK 1084-95Primer On Lead-Acid Storage Batteries (provided by instructor)
Using LockDown Browser and a Webcam for Online Exams
This course requires the use of LockDown Browser and a webcam for online exams. The webcam can be built into your computer or can be the type that plugs in with a USB cable. Watch this video (http://www.respondus.com/products/lockdown-browser/student-movie.shtml) to get a basic understanding of LockDown Browser and the webcam feature.
You will be required to pay a one-time fee to use the webcam feature of Respondus Lockdown Browser. Once paid, you will be able to use the webcam for the remainder of the course. If you are on scholarship, this fee should be paid from your scholarship funds.
You must download and install LockDown Browser from this link:
Note: Don't download a copy of LockDown Browser from elsewhere on the Internet; those versions won't work at our institution.
To take an online test, start LockDown Browser and navigate to the exam. (You won't be able to access the exam with a standard web browser.) For additional details on using LockDown Browser, review this Student Quick Start Guide (http://www.respondus.com/products/lockdown-browser/guides.shtml#student).
Finally, when taking an online exam, follow these guidelines:
Ensure you're in a location where you won't be interrupted.
Turn off all mobile devices, phones, etc.
Clear your desk of all external materials books, papers, other computers, or devices.
Remain at your desk or workstation for the duration of the test.
If a webcam is required, make sure it is plugged in or enabled before starting LockDown Browser.
LockDown Browser will prevent you from accessing other websites or applications; you will be unable to exit the test until all questions are completed and submitted.
If a webcam is required, you will be recorded during the test to ensure you're using only permitted resources.
Harbrace Essentials with Resources Writing in Disciplines 2nd Edition by Cheryl Glenn & Loretta Gray (ISBN-10: 1285451813). This resource has been adopted by New Mexico Junior College as the common reference book for students to use for writing assignments in their courses. This book is available at the NMJC bookstore.
NOTE: Generally no books are available at the NMJC book store for the Energy Technology degree. If a text is required a link will be provided in the course syllabus. When DOE Handbooks or Modules are required they will be provided in the course.
You can buy your books online at the NMJC Bookstore.
This course is graded on a point system with the final grade based on a percentage of the total points of all exams/quizzes and written assignments.
7 Quizzes (total 620 points) [Weighted together as one grade]
5 Group Discussions (20 points each; total 100 points) [Combined together as one grade]
2 Written Discussions (100 points each; total 200 points) [Weighted together as one grade]
1 Written Report (100 points)
1 Final Exam (100 points)
Total: 1120 points
Students attending New Mexico Junior College are evaluated according to the following grading scale:
90 - 100% = A
80 - 89% = B
70 - 79% = C
60 - 69% = D
0 - 59% = F
Response Time Frames:
The instructor will respond to student e-mail within 24 hours on week days and 48 hours on weekends.
Grades for written assignments will generally be posted within a week of the due date if due mid-term or the day before final grades are submitted for end-of-term assignments.
Retrieving Grades from T-BirdWeb Portal
Go to the New Mexico Junior College T-BirdWeb Portal login page. Please enter your User Identification Number (ID), which is your Banner ID, and your Personal Identification Number (PIN). When finished, click Login.
Tips for Success in Online Courses:
1. Log in to class regularly.
2. Pay attention.
3. Take notes.
4. Keep up with readings and assignments.
5. Ask questions when you do not understand something.
6. Utilize your professor’s office hours and e-mail.
7. Read the text.
8. Adhere to the deadlines posted in the course outline.
New Mexico Junior Colleges institutional student learning outcomes represent the knowledge and abilities developed by students attending New Mexico Junior College. Upon completion students should achieve the following learning outcomes along with specific curriculum outcomes for respective areas of study:
DSLO1. Accurately solve problems using foundational mathematics, physical sciences, and energy technology concepts. (CT3; C1)
DSLO2. Demonstrate an understanding of environmental safety in regards to Energy Industry processes and procedures. (C1; SC1)
DSLO3. Conduct, analyze, and/or interpret real world scenarios and case studies or laboratory experiments. (CT1; CT3; C1; SC2)
DSLO4. Demonstrate effective oral and written communication skills using specific energy technology terminology. (C2; SC3)
DSLO5. Demonstrate knowledge of energy systems and operations. (CT2; C2)
This course presents the basics of mechanical components, diesel engines, heat exchangers, pumps, and valves. Students will have the opportunity to understand the construction and operation of mechanical components associated with various Energy Industry facility and equipment operations and maintenance. This is a three credit hour course.
1. Demonstrate an understanding of the basics and applications of mechanical components. (DSLO5)
2. Evaluate the use and/or operation of various types of mechanical equipment associate with the Energy Industry. (DSLO3)
By the end of this course, students should understand the basics of:
1. FUNDAMENTALS OF THE DIESEL CYCLE
2. DIESEL ENGINE SPEED, FUEL CONTROLS, AND PROTECTION
3. TYPES OF HEAT EXCHANGERS
4. HEAT EXCHANGER APPLICATIONS
5. CENTRIFUGAL PUMPS
6. CENTRIFUGAL PUMP OPERATION
7. POSITIVE DISPLACEMENT PUMPS
8. VALVE FUNCTIONS AND BASIC PARTS
9. TYPES OF VALVES
10. VALVE ACTUATORS
11. AIR COMPRESSORS
14. COOLING TOWERS
17. STEAM TRAPS
18. FILTERS AND STRAINERS
19. BATTERY COMPONENTS AND OPERATION
20. LEAD-ACID BATTERY TYPES
21. BATTERY APPLICATIONS
22. BATTERY SIZING AND SELECTION
23. BATTERY MAINTENANCE
24. BATTERY STORAGE, TRANSPORTATION, AND DISPOSAL
If you have not already received login information for Canvas/T-BirdWeb Portal/E-mail, you will need to contact the Enrollment Management office at (575) 492-2546.
Check first-time login page for instructions at www.nmjc.edu/distancelearning/coursescourseschedules/canvasinstructions.aspx.
You must have access, on a regular basis, to a computer that supports the Canvas minimum specifications and has an active connection to the Internet. See the minimum computer specification requirements at www.nmjc.edu/distancelearning/coursescourseschedules/Canvasinstructions.aspx.
Students will be held responsible for the information on these pages.
Each student is expected to maintain the highest standards of honesty and integrity in online academic and professional matters. The College reserves the right to take disciplinary action, up to and including dismissal, against any student who is found guilty of academic dishonesty or otherwise fails to meet these standards. Academic dishonesty includes, but is not limited to, dishonesty in quizzes, tests, or assignments; claiming credit for work not done or done by others; and nondisclosure or misrepresentation in filling out applications or other College records. Cheating or gaining illegal information for any type of graded work is considered dishonest and will be dealt with accordingly.
Americans with Disabilities Act (ADA) Information
Any student requiring special accommodations should contact the Special Needs Student Services Coordinator at (575) 492-2576 or by e-mail at firstname.lastname@example.org.
Attendance Policy and Participation Expectations
It is expected that you regularly log into class at least three times weekly and check your Canvas mail to ensure you have not missed any changes/updates. Students are expected to complete discussions/quizzes/tests/ assignments before deadlines expire.
If you experience difficulty with Canvas you may reach the Canvas Helpdesk at email@example.com, or by calling the 24 hour helpdesk phone at (575) 399-2199.
The professor is responsible for monitoring and evaluating student conduct and student behavior within the Canvas course. By registering for this class, the student is assumed to have entered into an agreement with New Mexico Junior College and the professor to log into the class regularly and to behave in an appropriate manner at all times. Disruptive behavior may result in the student being removed from the class and dropped for the semester. For comprehensive information on the common rules of netiquette and other online issues, please review the NMJC Online Student Handbook.
Online Learning Environment
By participating in an online class, you undertake responsibility for your own progress and time management.
Offering the work of another as ones own, without proper acknowledgment, is plagiarism; therefore, any student who fails to give credit for quotations or essentially identical expression of material taken from books, encyclopedias, magazines and other reference works, or from the themes, reports, or other writings of a fellow student, is guilty of plagiarism. Plagiarism violates the academic honesty policy and is considered cheating.
Free tutoring services are available to all NMJC students through Brainfuse and the Academic Success Center located in Mansur Hall room 123 and 124.
The instructor has the right to drop any student who has failed to log on to Canvas for two weeks or more, but it is not guaranteed that the instructor will drop you. If the student chooses to stop attending a class, he/she should withdraw from the class by accessing your student account in the T-Bird Web Portal at www.nmjc.edu, or submitting the required paperwork to the Registrar’s Office by 5:00 p.m. on Friday, September 28, 2018. Failure to withdraw yourself from a course by this date may result in your receiving an “F” in the course. All students are encouraged to discuss their class status with the professor prior to withdrawing from the class.
Course Information Module
Module 0 Getting Started:
MODULE 1: Diesel Engine Fundamentals, DOE FUNDAMENTALS HANDBOOK, MECHANICAL SCIENCE, Volume 1 of 2, Module 1
MODULE 1 TERMINAL OBJECTIVE
1.0 Without references, DESCRIBE the components and theory of operation for a diesel engine.
1.1 DEFINE the following diesel engine terms:
a. Compression ratio
d. Combustion chamber
1.2 Given a drawing of a diesel engine, IDENTIFY the following:
e. Intake ports or valve(s)
f. Exhaust ports or valve(s)
g. Fuel injector
1.3 EXPLAIN how a diesel engine converts the chemical energy stored in the diesel fuel into mechanical energy.
1.4 EXPLAIN how the ignition process occurs in a diesel engine.
1.5 EXPLAIN the operation of a 4-cycle diesel engine to include when the following events
occur during a cycle:
c. Fuel injection
1.6 EXPLAIN the operation of a 2-cycle diesel engine, including when the following events occur during a cycle:
c. Fuel injection
1.7 DESCRIBE how the mechanical-hydraulic governor on a diesel engine controls engine speed.
1.8 LIST five protective alarms usually found on mid-sized and larger diesel engines.
Major Components of a Diesel Engine
Diesel Engine Support Systems
FUNDAMENTALS OF THE DIESEL CYCLE
The Basic Diesel Cycles
The Four-Stoke Cycle
The Two-Stroke Cycle
DIESEL ENGINE SPEED, FUEL CONTROLS, AND PROTECTION
Operation of a Governor
Group Discussion 1
Module 1 Quiz: Diesel Engine Fundamentals
MODULE 2: Heat Exchangers, DOE FUNDAMENTALS HANDBOOK, MECHANICAL SCIENCE, Volume 1 of 2, Module 2
MODULE 2 TERMINAL OBJECTIVE
1.0 Without references, DESCRIBE the purpose, construction, and principles of operation for each major type of heat exchanger: parallel flow, counter flow, and cross flow.
1.1 STATE the two types of heat exchanger construction.
1.2 Provided with a drawing of a heat exchanger, IDENTIFY the following internal parts:
b. Tube sheet
1.3 DESCRIBE hot and cold fluid flow in parallel flow, counter flow, and cross flow heat exchangers.
1.4 DIFFERENTIATE between the following types of heat exchangers:
a. Single-pass versus multi-pass heat exchangers.
b. Regenerative versus non-regenerative heat exchangers.
1.5 LIST at least three applications of heat exchangers.
1.6 STATE the purpose of a condenser.
1.7 DEFINE the following terms:
b. Condensate depression
1.8 STATE why condensers in large steam cycles are operated at a vacuum.
TYPES OF HEAT EXCHANGERS
Types of Heat Exchanger Construction
Types of Heat Exchangers
Comparison of the Types of Heat Exchangers
HEAT EXCHANGER APPLICATIONS
Air Conditioner Evaporator and Condenser
Large Steam System Condensers
Group Discussion 2
Module 2 Quiz: Heat Exchangers
MODULE 3: Pumps, DOE FUNDAMENTALS HANDBOOK, MECHANICAL SCIENCE, Volume 1 of 2, Module 3
MODULE 3 TERMINAL OBJECTIVE
1.0 Without references, DESCRIBE the purpose, construction, and principles of operation for centrifugal pumps.
1.1 STATE the purposes of the following centrifugal pump components:
e. Lantern ring
f. Wearing ring
1.2 Given a drawing of a centrifugal pump, IDENTIFY the following major components:
a. Pump casing
b. Pump shaft
e. Stuffing box
f. Stuffing box gland
h. Lantern ring
i. Impeller wearing ring
j. Pump casing wearing ring
1.3 DEFINE the following terms:
a. Net Positive Suction Head Available
c. Gas binding
d. Shutoff head
e. Pump runout
1.4 STATE the relationship between net positive suction head available and net positive suction head required that is necessary to avoid cavitation.
1.5 LIST three indications that a centrifugal pump may be cavitating.
1.6 LIST five changes that can be made in a pump or its surrounding system that can reduce
1.7 LIST three effects of cavitation.
1.8 DESCRIBE the shape of the characteristic curve for a centrifugal pump.
1.9 DESCRIBE how centrifugal pumps are protected from the conditions of dead heading and pump run-out.
2.0 Without references, DESCRIBE the purpose, construction, and principle of operation for
positive displacement pumps.
2.1 STATE the difference between the flow characteristics of centrifugal and positive displacement pumps.
2.2 Given a simplified drawing of a positive displacement pump, CLASSIFY the pump as one of the following:
a. Reciprocating piston pump
b. Gear-type rotary pump
c. Screw-type rotary pump
d. Lobe-type rotary pump
e. Moving vane pump
f. Diaphragm pump
2.3 EXPLAIN the importance of viscosity as it relates to the operation of a reciprocating positive displacement pump.
2.4 DESCRIBE the characteristic curve for a positive displacement pump.
2.5 DEFINE the term slippage.
2.6 STATE how positive displacement pumps are protected against overpressurization.
Centrifugal Pump Classification by Flow
Multi-Stage Centrifugal Pumps
Centrifugal Pump Components
CENTRIFUGAL PUMP OPERATION
Net Positive Suction Head
Centrifugal Pump Characteristic Curves
Centrifugal Pump Protection
Priming Centrifugal Pumps
POSITIVE DISPLACEMENT PUMPS
Principle of Operation
Positive Displacement Pump Characteristic Curves
Positive Displacement Pump Protection
Group Discussion 3
Module 3 Quiz: Pumps
MODULE 4: Valves, DOE FUNDAMENTALS HANDBOOK, MECHANICAL SCIENCE, Volume 2 of 2, Module 4
MODULE 4 TERMINAL OBJECTIVE
1.0 Without references, DESCRIBE the construction and operation of a given type of valve,
valve component, or valve actuator, as presented in this module.
1.1 DESCRIBE the four basic types of flow control elements employed in valve design.
1.2 DESCRIBE how valve stem leakage is controlled.
1.3 Given a drawing of a valve, IDENTIFY the following:
1.4 Given a drawing of a valve, IDENTIFY each of the following types of valves:
j. Stop check
1.5 DESCRIBE the application of the following types of valves:
1.6 DESCRIBE the construction and principle of operation for the following types of valve actuators:
b. Electric motor
VALVE FUNCTIONS AND BASIC PARTS
Introduction to the Types of Valves
TYPES OF VALVES
Gate Valve Disk Design
Gate Valve Stem Design
Gate Valve Seat Design
Globe Valve Body Designs
Globe Valve Disks
Globe Valve Disk and Stem Connections
Globe Valve Seats
Globe Valve Direction of Flow
Ball Valve Stem Design
Ball Valve Bonnet Design
Ball Valve Position
Multiport Plug Valves
Plug Valve Disks
Lubricated Plug Valve Design
Manually Operated Plug Valve Installation
Plug Valve Glands
Diaphragm Valve Stem Assemblies
Diaphragm Valve Bonnet Assemblies
Pinch Valve Bodies
Butterfly Valve Seat Construction
Butterfly Valve Body Construction
Butterfly Valve Disk and Stem Assemblies
Needle Valve Applications
Needle Valve Body Designs
Swing Check Valves
Tilting Disk Check Valves
Lift Check Valves
Piston Check Valves
Butterfly Check Valves
Stop Check Valves
Relief And Safety Valves
Pilot-Operated Relief Valves
Manual, Fixed, and Hammer Actuators
Electric Motor Actuators
Solenoid Actuated Valves
Speed of Power Actuators
Valve Position Indication
Group Discussion 4
Module 4 Quiz: Valves
WRITTEN DISCUSSION 1 DUE
MODULE 5: Miscellaneous Mechanical Components, DOE FUNDAMENTALS HANDBOOK, MECHANICAL SCIENCE, Volume 2 of 2, Module 5
MODULE 5 TERMINAL OBJECTIVE
1.0 Without references, DESCRIBE the purpose, construction, and operation of miscellaneous
1.1 STATE the three common types of air compressors.
1.2 DESCRIBE the basic operation of the following types of air compressors:
1.3 STATE the reason for using cooling systems in air compressors.
1.4 STATE three hazards associated with pressurized air systems.
1.5 Given the appropriate information, CALCULATE the pressure or force achieved in a hydraulic piston.
1.6 DESCRIBE the basic operation of a hydraulic system.
1.7 DESCRIBE the basic operation of a boiler.
1.8 IDENTIFY the following components of a typical boiler:
a. Steam drum
b. Distribution header(s)
c. Combustion chamber
1.9 STATE the purpose of cooling towers.
1.10 DESCRIBE the operation of the following types of cooling towers.
a. Forced draft
b. Natural convection
1.11 STATE the purpose of a demineralizer.
1.12 STATE the four purposes of a pressurizer.
1.13 DEFINE the following terms attributable to a dynamic pressurizer:
a. Spray nozzle
d. Surge volume
1.14 STATE the purpose and general operation of a steam trap.
1.15 IDENTIFY the following types of steam traps:
a. Ball float steam trap
b. Bellow steam trap
c. Bucket steam trap
d. Impulse steam trap
1.16 DESCRIBE each of the following types of strainers and filters, including an example of
a. Cartridge filters
b. Precoated filters
c. Deep-bed filters
d. Bucket strainer
e. Duplex strainer
1.17 EXPLAIN the application and operation of a strainer or filter backwash.
Hazards of Compressed Air
Pressure and Force
Fuel Boiler Components
Induced Draft Cooling Towers
Forced Draft Cooling Towers
Natural Convection Cooling Towers
Purpose of Demineralizers
Ball Float Steam Trap
Bucket Steam Trap
Thermostatic Steam Traps
Bellows-Type Steam Trap
Impulse Steam Trap
Orifice-Type Steam Trap
FILTERS AND STRAINERS
Backwashing Precoat Filters
Module 5 Quiz: Miscellaneous Components
MODULE 6: Lead-Acid Batteries, DOE HANDBOOK 1084-95, PRIMER ON LEAD-ACID STORAGE BATTERIES
Upon completion of this Primer the reader should be able to do the following:
Identify the differences between primary and secondary batteries.
Identify the major types of lead-acid storage batteries.
Define the following terms: cell, battery, electrolyte, separator, terminal, electrode, thermal runaway, gassing.
Identify the active materials in the lead-acid cell.
Describe the effects of temperature and discharge rate on battery capacity and life.
Identify industry and government standards for maintenance, testing, replacement, sizing, and installation of lead-acid batteries.
Identify the three most common applications of lead-acid batteries.
Identify and describe four charging techniques.
Identify safety precautions for operating and maintaining lead-acid batteries.
Identify federal regulations governing lead-acid battery disposal.
Identify the two basic types of "maintenance-free" batteries.
Describe the effect that overcharging has on gassing and thermal runaway.
BATTERY COMPONENTS AND OPERATION
Cells vs. Batteries
Primary and Secondary Cells and Batteries
Cell and Battery Voltage
Capacity and Battery Ratings
Series and Parallel Connections
LEAD-ACID BATTERY TYPES
Flooded Lead-Acid Batteries
Sealed Lead-Acid Batteries
OPERATION AND CONSTRUCTION
Lead-Acid Battery Active Materials
Electrochemistry of the Lead-Acid Cell
Negative and Positive Plate Construction Methods
Effects of Discharge Rate and Temperature on Capacity and Life
Starting, Lighting, and Ignition
SIZING AND SELECTION
Matching the Charger to Battery Requirements
Maintaining Electrolyte Levels
Avoiding High Temperatures
Supplying an Equalizing Charge
STORAGE, TRANSPORTATION, AND DISPOSAL
Group Discussion 6
Module 6 Quiz: Battery Fundamentals
WRITTEN DISCUSSION 2 DUE
IED REPORT DUE