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Study Guide for Air Conditioning and Refrigeration | HVA 101, Study notes of Engineering

Front Range Community CollegeEngineering

Material Type: Notes; Class: Air Conditioning&Refrigeration; Subject: Heating and Air Conditioning; University: Front Range Community College; Term: Summer 2009;

Typology: Study notes

Pre 2010

Uploaded on 08/05/2009

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STUDY GUIDE
HVA 101.08
SOLDERING AND WELDING EQUIPMENT
JS = Job Sheet
IS = Information Sheet
AS = Assignment Sheet
TEXT, Laboratory Manual, and Study Guide - Modern Refrigeration and Air Conditioning, By
Althouse/Turnquist/Bracciano, 18th Edition
1. Study paragraphs 2-1 through 2.1.6, Tubing
2. Complete AS #7, Tubing
3. Study paragraphs 2.1.6 through 2.4.2, Tubing Tools
4. Complete AS #8, Tubing Tools
5. Study IS #1, Tubing and Fittings (5 pages)
qkd724-296162-2581457-hva-101-08-welding-doc.doc 1
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STUDY GUIDE

HVA 101.

SOLDERING AND WELDING EQUIPMENT

JS = Job Sheet IS = Information Sheet AS = Assignment Sheet TEXT, Laboratory Manual, and Study Guide - Modern Refrigeration and Air Conditioning, By Althouse/Turnquist/Bracciano, 18th^ Edition

  1. Study paragraphs 2-1 through 2.1.6, Tubing
  2. Complete AS #7, Tubing
  3. Study paragraphs 2.1.6 through 2.4.2, Tubing Tools
  4. Complete AS #8, Tubing Tools
  5. Study IS #1, Tubing and Fittings (5 pages) qkd724-296162-2581457-hva-101-08-welding-doc.doc 1

HVA 101.08 Student Name: ______________________________ Date: ________________ Refrigeration Tools and Materials AS # Answer the following questions:

  1. Most tubing used in refrigeration and air conditioning is made of.
  2. ACR tubing is usually charged with gaseous and sealed to keep it dry and clean until it is used.
  3. Type K tubing is heavy wall tubing and type L is wall tubing.
  4. Copper tubing used for heating and plumbing is of a different size called .
  5. What does S.A.E. refer to? _________________________________________________
  6. When a job using copper tubing is completed, there should be no on the tubing.
  7. Hard drawn copper should not be bent. How should it be installed?
  8. Hard drawn copper should be connected by.
  9. Most tubing used in refrigerant and air conditioning is made of copper, however, other materials are used, name four other tube materials.
  10. When using ACR tubing the unused portion of new tubing should be kept to keep it from oxidation.
  11. Most ACR tubing presently used is type thickness. qkd724-296162-2581457-hva-101-08-welding-doc.doc 2
  1. Copper or brass tubing or fittings should not be used with refrigerants. (717)
  2. Stainless steel is available in the standard tubing sizes. it is connected using and.
  3. Nominal size copper tubing has an outside diameter larger than the listed nominal size.
  4. Plastic tubing, due to its safe temperature range, is used in the refrigeration or air conditioning cycle.
  5. Where can plastic tubing are used in air conditioning and refrigeration work?
  6. Where is the flexible tube (hose) used in air conditioning and refrigeration work?
  7. Many types of fittings are used with flexible hose. They are fabricated out of several different materials. They all conform to standard fitting specifications. (see fig 2-5) qkd724-296162-2581457-hva-101-08-welding-doc.doc 4

HVA 101.08 Student Name: _______________________________ Date: _____________ SOLDERING AND WELDING EQUIPMENT AS # Answer the following questions:

  1. To cut tubing, especially annealed (soft), copper a is used.
  2. After cutting tubing the ends must be filed, reamed, or scraped to remove burrs on the end of the tubing.
  3. When using a hacksaw it is good to use a sawing to ensure square cuts.
  4. A bending spring is sometimes used to bend tubes. The tool can be used either or and helps to prevent flattening or buckling of the tube.
  5. Some flare connections are flares where double thickness of the tube forms the flare.
  6. What is the angle of flares used on steel tubing?
  7. What is the advantage of a double flare?
  8. Flared type fittings are made for connecting tubing. Most flared fitting shapes for wrench attachment.
  9. Brazed joints are generally used for pipe and tubing.
  10. What is the material in 95/5 solder?
  11. A hacksaw can be used to cut copper or steel tubing. However, a is preferred to cut larger, hard copper.
  12. A hacksaw blade should have a wave set blade of teeth to do the best job. qkd724-296162-2581457-hva-101-08-welding-doc.doc 5
  1. What is the angle of most flares? ________________
  2. Double thickness flares should be used on tubing and larger.
  3. To attach a fitting to soft copper tubing a type connection is generally used.
  4. U.S. conventional and metric fittings are identical, True or False?
  5. What action is used to draw the solder in a joint?
  6. At what temperature does 95/5 solder melt?
  7. What is 95/5 made of?
  8. Why is 95/5 better than 50/50?
  9. What is the advantage of brazing?
  10. What is the temperature of brazing filler metal?
  11. Brazing can be used to join similar and dissimilar metals, True or False? qkd724-296162-2581457-hva-101-08-welding-doc.doc 7
  1. What are the two categories of the metals used in brazing?
  2. Strength of a brazed copper joint is dependent on the fit between the tube and the socket, True or False?
  3. Soldering is an process.
  4. One of the best methods of making leak proof connections while providing maximum strength is?
  5. Swaging tubing is a good process for copper tubing. Why is it not good for steel tubing?
  6. Why are there two gauges used on top of an oxygen and acetylene bottle?
  7. To complete a good solder joint, four important procedures must be followed:
  8. To complete a good brazed joint, seven important procedures must be followed:
  9. A 95/5 alloy of tin and lead solder is usually satisfactory for soldering. qkd724-296162-2581457-hva-101-08-welding-doc.doc 8