EIM NCII LMG9 p81-114.pdf

Content Standard

Performance Standard

 The learner demonstrates demonstrates understanding of underlying principles in the installation of electrical lighting system, auxiliary outlets and lighting fixtures.

 The learner independently independently installs electrical lighting systems, auxiliary outlets and lighting fixtures based on the Philippine Electrical Code (PEC) standards and Local Code/Utility Company Regulations.

Quarter II

Time Allotment: 40 Hours

Lesson: Lesson : Installing electrical lighting systems on auxiliary outlets and lighting fixtures.

I. INTRODUCTION  This learning module contains the knowledge and skills in Installation of Electrical Lighting System on Auxiliary Outlets and Lighting Fixtures. Fixtures. It covers the knowledge, skills, and attitudes required in installing the lighting fixtures. Specifically, this module covers installation of knob and tube, PVC raceway/molding, rigid non-metallic conduit, flexible non-metallic conduit, fluorescent lighting fixtures, and incandescent lamp  This learning module consists of one (1) Learning Outcome (LO) ( LO) that contain learning activities for both knowledge and skills supported with information sheets, activity sheets, and self-check.

II. LO 1. Plan and Prepare Work for a Specific Job Order    

Choose appropriate lighting fixtures for specific tasks Differentiate types of fluorescent lamp Identify the parts and discuss the functions of other lamps Discuss parts of incandescent lamp and its function

III. PRE/DIAGNOSTIC ASSESSMENT TEST I : I : Direction: Choose the letter of the correct correct answer and and write the answer on a separate sheet of paper.

81

1. It is a coiled wire which produces high voltage to start the fluorescent lamp into operation. a. Transformer c. Ballast b. Tungsten filament d. Starter 2. It is the Philippine Electrical Code (PEC) maximum requirement requirement on spacing between supports if we are using 15mm to 25 mm conduit size. a. 600 mm b. 400 mm c. 900 mm d. 1500 mm 3. It is the maximum size of rigid nonmetallic conduit allowed by PEC in wiring installation. a. 90 mm b. 160 mm c. 150 mm d. 125 mm 4. It is the lighting fixture that consists of a glass tube containing mercury vapor (at a low pressure) and inert gas like argon and krypton, where the interior is coated with phosphor. It glows or fluoresces when exposed to ultraviolet light. a. Compact fluorescent lamp b. Circular type Fluorescent Lamp c. Fluorescent Lamp d. Open type fluorescent Lamp 5. It is a tubular or linear bulb containing mercury vapor and and inert gas with phosphor coating inside. a. Compact fluorescent lamp b. Fluorescent tube c. Fluorescent Lamp d. Open type fluorescent Lamp 6. It is an induction coil, which produces high voltage to start the lamp into operation and limits the flow of current during the operation of the lamp. a. induction type ballast b. Electronic type ballast c. E type ballast d. Ballast 7. It is the amount of power consumed by the lamp itself during its operation? a.10-20% b. 15-30% c. 40-60% d. 75-100% 8. It is a glow switch that opens and closes the circuit so as to produce a high voltage or inductive kick across the bulb at the filament during the starting period. a. Ignition switch b. Electronic starter c. Starter d. Ballast

82

1. It is a coiled wire which produces high voltage to start the fluorescent lamp into operation. a. Transformer c. Ballast b. Tungsten filament d. Starter 2. It is the Philippine Electrical Code (PEC) maximum requirement requirement on spacing between supports if we are using 15mm to 25 mm conduit size. a. 600 mm b. 400 mm c. 900 mm d. 1500 mm 3. It is the maximum size of rigid nonmetallic conduit allowed by PEC in wiring installation. a. 90 mm b. 160 mm c. 150 mm d. 125 mm 4. It is the lighting fixture that consists of a glass tube containing mercury vapor (at a low pressure) and inert gas like argon and krypton, where the interior is coated with phosphor. It glows or fluoresces when exposed to ultraviolet light. a. Compact fluorescent lamp b. Circular type Fluorescent Lamp c. Fluorescent Lamp d. Open type fluorescent Lamp 5. It is a tubular or linear bulb containing mercury vapor and and inert gas with phosphor coating inside. a. Compact fluorescent lamp b. Fluorescent tube c. Fluorescent Lamp d. Open type fluorescent Lamp 6. It is an induction coil, which produces high voltage to start the lamp into operation and limits the flow of current during the operation of the lamp. a. induction type ballast b. Electronic type ballast c. E type ballast d. Ballast 7. It is the amount of power consumed by the lamp itself during its operation? a.10-20% b. 15-30% c. 40-60% d. 75-100% 8. It is a glow switch that opens and closes the circuit so as to produce a high voltage or inductive kick across the bulb at the filament during the starting period. a. Ignition switch b. Electronic starter c. Starter d. Ballast

82

9. What is the rated average life span of a fluorescent lamp if it is with an average of 3 hours burning per day? a.12,000 hours b. 15,000 hours c. 20,000 hours d. 30,000 hours 10. He was the scientist that experimented with thousands of different filaments to find just the right materials to glow well and be long-lasting and eventually produced a bulb that could glow for over 1500 hours.? a.William David Coolidge c. Humphry Davy b. Thomas Alva Edison d.Willis R. Whitney

INFORMATION SHEET 1.1 LIGHTING FIXTURE AND ACCESSORIES

History and Development of the Incandescent Incandescent Lamp The Incandescent Light Bulb  The first incandescent incandescent electric light was made in 1800 by Humphry Davy, Davy, an English scientist. He experimented with electricity and invented an electric battery. When he connected wires to his battery and a piece of carbon, the carbon glowed, producing light. This is called an electric arc. arc . Much later, in 1860, English physicist, Sir Joseph Wilson Swan (1828-1914) was determined to devise a practical, long-lasting electric light. He found that a carbon paper filament worked well, but burned up quickly. In 1878, he demonstrated his new electric lamps in Newcastle, England. Thomas Alva Edison, an American inventor experimented with thousands of different filaments to find just the right materials to glow well and be long-lasting. In 1879, Edison discovered that a carbon filament in an oxygen-free bulb glowed but did not burn up for 40 hours. Edison eventually produced a bulb that could glow for over 1500 hours. Lewis Howard Latimer (1848-1928) improved the light bulb by inventing a carbon filament which was patented in 1881. Latimer was a member of Edison's research team, which was called "Edison's Pioneers." In 1882, Latimer developed and patented a method of manufacturing his carbon filaments. In 1903, Willis R. Whitney invented Whitney  invented a treatment for the filament so that it would not darken the inside of the bulb as it glowed. In 1910, William David Coolidge (1873-1975) Coolidge  (1873-1975) invented a tungsten filament, which 83

lasted even longer than the older filaments. The incandescent bulb revolutionized the world.

Parts of an Incandescent Bulb Coiled tungsten filament  - the metal wires that glow brightly when electricity flows through them. Connecting wires  - The wires that carry electricity from the bulb's electrical contact to the filament. Electrical contacts - the metallic base of the bulb, which connects to the electrical contacts of the lamp when the bulb is in the lamp. Glass envelope - the thin layer of glass that surrounds the light bulb mechanism and the inert gases. Glass fuse enclosure  –   the glass that insulates the bulb's fuses located in the stem of the bulb. Mixture of inert gases at low pressures - the bulb that is filled with inert (non-reactive) gases. Screw cap - the threaded base of the bulb that secures it to a lamp. Support wires - wires that physically hold up the filament.

84

Edison’s first successful lamp

It is certainly true that Edison did invent the light bulb (or at least "a " light bulb), but he was not the first. In 1860, an English physicist and electrician, Sir Joseph Wilson Swan, produced his first experimental light bulb using carbonized paper as a filament. Unfortunately, Swan did not have a strong enough vacuum or sufficiently powerful batteries and his prototype did not achieve complete incandescence, so he turned his attention to other pursuits.

Thomas Alva Edison

So it is reasonable to wonder why Edison received all the credit, while Swan was condemned to obscurity. The more cynical among us may suggest that Edison was thrust into the limelight because many among us learn their history through films, and the vast majority of early films were made in America by patriotic Americans. However, none of this should detract from Edison who, working independently, experimented with thousands of filament materials and expended tremendous amounts of effort before discovering carbonized thread. It is also probably fair to say that Edison did produce the first commercially viable light bulb.  The reason why this is of interest to us here is that Edison's experiments with light bulbs led him to discover the Edison Effect,  which ultimately led to the invention of the vacuum tube. Edison's light bulbs employed a conducting filament mounted in a glass bulb from which the air was evacuated leaving a vacuum. Passing electricity through the filament caused it to heat up enough to become incandescent and radiate light, while the vacuum prevented the filament from oxidizing and burning up.

Operation of incandescent lamp What makes a light bulb glow?  The thin wire, or filament, inside a light bulb resists the flow of current through it. When electricity is passed through the bulb, the filament becomes hot and glows brightly. To prevent the filament burning away

85

completely, the glass bulb filled with a mixture of inert gas (usually argon and nitrogen). The filament in most light bulbs is made of tungsten.

Elements used in the manufacturing incandescent lamp 1. Lead-in wire

6. Coiled tungsten

2. Glass

7. Mica

3. Argon gas

8. Copper

4. Inert gas

9. Nitrogen

5. Coiled tungsten

86

Classification of Incandescent Lamp 1. Large lamps are those normally used for interior and exterior general and task lighting.

2. Miniature lamps  are generally used in automotive, aircraft, and appliance applications.

87

3. Photographic lamps as the name implies, are used in photography and projection service.

Kinds of High Intensity discharge lamp 1. Mercury lamp  is an electric discharge lamp in which the major portion of the radiation is produced by the excitation of mercury atoms.

88

2. Metal halide lamp is an electric discharge lamp in which the light is produced by the radiation from an excited mixture of a metallic vapor (mercury) and the products of the dissociation of halides (for example, halides of thallium, indium, sodium).

3. High-pressure sodium lamp is an electric discharge lamp in which the radiation is produced by an excitation of sodium vapor in which the partial pressure of the vapor during operation is of the order of 104 N/m2.

89

The Incandescent Filament Lamp Construction  This lamp consist; simply of a tungsten filament inside a gas-filled, sealed glass envelop. Current passing through the high-resistance filament heats it to incandescence, producing light. Gradual evaporation of the filament causes the familiar blackening of the bulbs and eventual filament rupture and lamp failure.

Procedures in installing Incandescent Lamp 1. Gather all necessary materials for the work then secure tools, equipment and PPE’s from the tool room. 90

2. On your work area, layout all the measurement of installation based on the given work plan. Use pencil to mark the location dimensions. 3. All measurement should be taken from the center to center of conduits, raceways and devices. 4. Level the horizontality and verticality positions of the layout. 5. Use chalk line to make final mark of the layout of conduits, raceways, boxes and devices. Make sure that all marks are horizontally and vertically levelled. 6. Install/mount all boxes to be followed by connector and adopter, if necessary and required by the job, tighten snugly according to the manufacturer’s torque specification. 7. For box type lighting fixture and surface type receptacle, mount them to the specified measurement and locations, but for l ighting materials (such as incandescent bulb) that use flush type receptacles, provide  junction box for the mounting of flush type receptacle. 8. Install/mount wire ways such as conduit, raceway, and NM cables. Place the desired kind and size of support according manufacturer’s specification. 9. Cut, and bend wire ways to desired length and bends based on the  job requirements. Avoid installing nicked conduits. All ends must be free of burrs. 10. Fish-in conductors/wires inside conduits/wire ways based on the required size of wire as prescribed by the PEC. 11.

Cut wire to the desired length. Always provide allowance (6-8” for smaller size of wire) for future tapping or termination.

12.

Strip wires in the boxes then connect them to the terminals of the switches, breakers, and fuse clip holder. Note: All loop termination must be turning clockwise and tighten snugly according to manufacture’s torque specification. Avoid excess wire termination.

Splice, joint wires in junction boxes based on the circuit design operation. Joining or splicing of conductors inside conduits, raceways is strictly prohibited. Make sure the wires joined have 6-8” 1. allowances from the edge of the box to the outstripped joined end of wires.

91

2.

Connect all lighting materials based on the circuit design operation.

3.

Check the continuity of circuit to identify and troubleshoot possible defects.

4.

When installation is completed, ask your teacher to evaluate your performance based on the rating sheet provided.

ACTIVITY SHEET 1.1 INSTALLATION OF THE INCANDESCENT LAMP USING THE RIGID NON-METALLIC CONDUIT Tools, Materials and Instruments Needed: Instrument: Multitester

- 1 unit

Materials: Incandescent Lamp (25 watts) Lamp socket Utility box Safety switch SPST switch  Junction box Adapter with lock nuts Conduit clamps/straps 1 gang plate cover Wood screws (¼ x ½) Electrical tape Rigid non metallic conduit Solid/Stranded Conductor             

-

2 set 2 pcs 3 pcs 1 set 1 pcs 4 pcs 15 pcs 25 pcs 3 pcs 50 pcs 1 roll 3 pcs 15 m

-

1 1 1 1 1 1 1 1

-

1 pair 1 pc

Tools:        

Philip Screw driver Flat Screw driver Side cutting pliers Diagonal cutting pliers Long nose pliers Push pull tape rule Claw Hammer Gimlet

Personal Protective Equipment: Gloves Goggles  

92

pc pc pc pc pc pc pc pc

Instruction:   When

you are ready to perform this task, ask your teacher to observe the process and to rate your performance using the assessment criteria. Follow the line diagram strictly and the teacher will determine the distance of each circuit.

Single Line diagram of two (2) incandescent lamps controlled by two (2) three – way-switch and One (1) SPST switch using Flexible Non-metallic Conduit.

Procedure: 1. Prepare the necessary tools and materials. 2. Wear appropriate PPE. 3. Layout all the measurements of installation, based on the drawing. 4. Mount all boxes and receptacles together with their connectors/ adaptors to work board. 5. Install the conduits and straps. 6. Fish-in conductors inside conduit/wire ways. 7. Splice and joint wires in the junction’s box based on the circuit design operation.

93

8. Connect incandescent lamp based on the circuit design. 9. Check the circuit for any short-circuits using a multitester. 10. Ask the assistance of your teacher to evaluate your work.

Scoring Rubrics

CRITERIA 1. Accuracy (25%)

2. Quality (25%)

3. Method (25%)

4. Speed (25%)

Very Good (5)

Good (4)

Fair (3)

Needs Improvement (2) Lamp does not light

Lamp lights

Lamp lights

Lamp lights but flickers

Wirings are installed and energized. Followed specifications.

Wirings are installed and energized. Missed 1 specification.

Wirings are installed and energized. Missed 2 Specifications.

Wirings are installed and energized. Work is loose and not presentable.

Followed procedure correctly, observed safety while working, and performed good housekeeping

Followed procedure correctly, economical use of tools is followed; observed safety while working

Incorrect usage of tools

Did not follow the required procedures

Submitted work two (2) minutes ahead of time

Submitted work on a given time

Submitted work two (2) or more minutes after the given time

Unable to finish the work

Rating: 5.0  –  4.6 4.5 3.9 3.8  –  3.0 2.9 and below

= Very Good = Good = Fair = Needs Improvement

94

SELF-CHECK 1.1 Directions:  Answer the following questions. Write your answers on a separate answer sheet.  Test

I.

Identification: Identify what is being described by the following statements. 1.  The type of bulb used in photography and projection services. 2.  These bulbs are generally used in automotive, aircraft, and appliance applications.

3.  These bulbs are normally used for interior and exterior general and task lightings.

4. It is the metal wire that glows brightly when electricity flows through it.

5.  These are the wires that carry electricity from the bulb's electrical contact to the filament.

6. It is the metallic base of the bulb which connects to the electrical contacts of the lamp when the bulb is in the lamp.

7. It is the thin layer of glass that surrounds the light bulb mechanism and the inert gases.

8. It is a glass that insulates the bulb's fuses which is located in the stem of the bulb.

9. It is the threaded base of the bulb that secures it to a lamp.

10. It is a wire that physically holds up the filament.  TEST II: Enumeration 1. Enumerate the nine (9) elements used in manufacturing incandescent lamp. 2. Enumerate the eight (8) different parts of the light bulb. 3. Enumerate the two (2) different connections for an incandescent lamp.

95

INFORMATION SHEET 1.2 FLUORESCENT LIGHTING FIXTURES PEC Rules on Wire Dressing and Termination Article 6.3.1.3 Live Parts. Fixtures, lamp holders, lamps, rosettes, and receptacles shall have no live parts normally exposed to contact. Exposed accessible terminals in lamp holders, receptacles, and switches shall not be installed in metal fixture canopies or in open bases of portable table or floor lamps. All joints/splices to be done must be properly insulated with spaghetti sleeving, wrapped with electrical tape having a similar thickness of the conductor used. Types of electric discharge fluorescent lamps 1. Pre-heat starting, hot-cathode  –   This requires starter (glow switch) and is pre-heated during starting. It uses a ballast to produce high voltage to start the lamp into operation and to limit the flow of current. 2. Cold cathode  –  This requires high voltage in its operation. This lamp has electrodes made of thimble-type iron. It is not pre-heated and does not require a starter for starting. Special high voltage transformers operate it. Neon and mercury lamps are classified under cold cathode lamps. 3. Instant-starting, hot-cathode  –  The lamp cathode in the instant-start is not pre-heated. Sufficient voltage is applied across the cathodes to create an instantaneous arc. As in preheat circuit; the cathodes are heated during lamp operation by the arc. The instant-start lamps, which require single-pin bases, are generally called slim line lamps. 4.

Hot-cathode, rapid-start  –   These are similar in construction to the preheat lamps; the basic difference is in the circuitry. This circuit eliminates the delay inherent in preheat circuits by keeping the lamp cathodes constantly energized (preheated). When the lamp circuit is energized, the arc is struck immediately. No external starter is required. Because of its simplicity of operation, rapid start lamps will operate satisfactorily in a preheat circuit. The reverse is not true, because preheat requires more current to heat the cathode than the rapid-start ballast provides.

Operation of pre-heat type fluorescent lamp  The tube filaments, starter (glow switch), and ballast are all connected in series, which constitute a complete circuit once the switch is closed. As current flows through, the gas (inert) inside the starter glows and the electrodes are heated. Since one of the electrodes is a bi-metal, it bends 96

and makes contact with the other. At this instant, the circuit is metallically complete. The filaments of the fluorescent tube are then heated and partial ionization takes place. The bi-metals in the starter cools and the contacts open. The magnetic field in the ballast collapses rapidly producing an inductive kick, which establishes a current between the filaments and fires the tube into operation. Classifications of Fluorescent Lamp 1. Regular Fluorescent Lamp

Circular type fluorescent lamp

Open type fluorescent lamp

97

Box type fluorescent lamp 2. Compact Fluorescent Lamp

Different types of Compact Fluorescent Lamp

98

Parts and Functions of Fluorescent Lamp

1. Fluorescent tube  is a tubular/linear bulb containing mercury vapor and inert gas with phosphor coating inside.

Parts of Fluorescent tube

2. Ballast is an induction coil, which produces high voltage to start the lamp into operation. It also limits the flow of current during the operation of the lamp. Ballast consumes power, which is between 10-20% of power consumed by the lamp itself.

99

Induction type ballast

Electronic type ballast

Different types of Ballast 3. Starter  is a glow switch that opens and closes the circuit so as to produce a high voltage or inductive kick across the bulb at the filament during the starting period.

Different types of Starter

100

4.

Lamp holder and starter socket   are the point of connection of the fluorescent and starter.

5. Frame is the metal housing of the whole fixture.

Parts of fluorescent lamp starter

Starter housing

Base contact

Connecting wire

101

Current moves in utilizing the rare gas as conducting means and the rare gas produces a “glow”. The glow generates   heat and causes the bimetallic blade to expand. When the bimetallic blade is heated, it changes shape and touches the fixed contact. The close contacts of the two starter contacts produce an easy path for the current to flow. Parts and operation function of the ballast

Coil inside Laminated iron core

 Terminal block Ballast frame

In common with all gaseous discharge lamps, the fluorescent must be provided with some device for limiting the current drawn by the discharge. Without a limiting device, the current would rise to a value that would destroy the lamp. A device or auxiliary called ballast can best meet this requirement.  The ballast for operating lamps on an alternating current consists of a small choke coil woven on an iron core.

102

 This ballast serves three important functions: 1. It preheats the electrodes to make available a large supply of the electron. 2. It provides a surge of relatively large potential to start the arc between the electrodes. 3. It prevents the arc current to increase beyond the limit set for each size and lamp. The Life Span of Fluorescent Lamp  The life of fluorescent lamp is affected not only by the fluctuation of voltage and current but also by the number of times it is started. Electron emission material is “sputtered off” from the electrodes continuously during the operation of the lamp and in larger quantities each time the lamp starts. Many fluorescent lamps have a rated average life span up to 30,000 continuous burning hours but with an average of 3 hours burning per start, it could only last for 12,000 hours.

ACTIVITY SHEET 1.2 ASSEMBLING OPEN - TYPE 20 WATTS FLUORESCENT LAMP

Tools, Materials Needed Material: Fluorescent Lamp (20 watts) Tools: Philip Screw driver Flat Screw driver Side cutting pliers Long nose pliers Personal Protective Equipment: Gloves Goggles 

   

 

-

1 set

-

1 1 1 1

-

1 pair 1 pc

pc pc pc pc

Procedures: 1. Prepare the necessary tools, and materials. 2. Wear appropriate PPE.

3. Assemble and wire a 20-w fluorescent fixture using Normal or Medium Power Factor ballast (M.P.F.)

103

Use bolt and nut in fixing the ballast to the frame 4. Mount the starter socket to the frame. Make sure it is attached securely.

104

5. Mount the connection terminal socket to the frame. Make sure that it is fixed, not too loose or too tight.

6. Make the necessary connections of the fluorescent fixture by referring to the schematic wiring diagram.

Schematic Diagram, Preheat Fluorescent Lamp. 105

7.  Test the circuit for ground short or open wiring. If fault is found, repair it. 8. Observe good housekeeping. Scoring Rubrics Points

Dimensions 1. Accuracy of connections

10

2. Functionality of the fluorescent lamp

10

3. Use of tool 4. Speed

5 5

5. Housekeeping

5 35 points

ACTIVITY SHEET 1.3 ASSEMBLING THE 40- WATT FLUORESCENT FIXTURE USING 2 X 40 WATT HIGH POWER FACTOR (H.P.F.) BALLAST Tools, Materials Needed Materials: Fluorescent lamp (40 watts) Fixture frame Tools: Philip screw driver Flat screw driver Side cutting pliers Long nose pliers Personal Protective Equipment: Gloves Goggles  

   

 

-

2 set 1 pc

-

1 1 1 1

-

1 pair 1 pc

pc pc pc pc

Procedure: 1. Prepare the necessary tools, and materials. 2. Wear appropriate PPE. 3. Mount the lamp holders and the 2 x 40watts ballast to the fluorescent fixture frame.

106

Mounting Lamp Holders and Ballast to the Fluorescent Frame

4. Cut the fixture wires and make the necessary joints or connection by referring to the schematic diagram.

5. Place the cover of the fluorescent fixture housing if necessary. 6. Screw or place the starter and the fluorescent tubes.

107

Attaching the Starter and the Fluorescent Tubes 7. Check the wiring connections and plug in the fixture to the source to test the assembled fixture for normal operation. 8. Observe good housekeeping. Scoring Rubrics Points

Dimensions 1. Accuracy of connections

10

2. Functionality of the fluorescent lamp

10

3. Use of tool

5

4. Speed

5

5. Housekeeping

5 35 points

ACTIVITY SHEET 1.4 ASSEMBLING THE TWO-UNIT 40 WATT FLUORESCENT FIXTURE USING RAPID START BALLAST

Tools, Materials Needed Materials: Fluorescent Lamp (40 watts) Fixture Frame Tools: Philip Screw driver 

-

2 set 1 pc



-

1 pc



108

Flat Screw driver Side cutting pliers Long nose pliers Personal Protective Equipment: Gloves Goggles   

 

-

1 pc 1 pc 1 pc

-

1 pair 1 pc

Procedure: 1. Prepare the necessary tools and materials. 2. Wear appropriate PPE. 3. Mount the rapid start ballast inside the frame (do the same procedure of mounting as stated in the Activity Sheet No. 2). 4. Mount two lamp holders on each end of the metal frame . 5. Make the necessary connections of the holders and ballast as in Figure 3.1, single lamp; Figure 3.2, double lamp.

Blue/White Blue White

Black/White White

Red Red Figure 3.1 Single Lamp

109

Red

Black

White

Yellow

Figure 3.2 - The G.E. Rapid-Start Ballast Connection 6. Follow strictly the wire color code as indicated in the ballast connection diagram.

Schematic Diagrams of Discharge Lamps

110

Instant start (Cold Cathode)

Connection of a Fluorescent Lamp with the Electronic Ballast

111

7.  Test the circuit for ground short or open wiring. If fault is found, repair it. 8. Observe good housekeeping.

Instruction:  When you are ready to perform this task, ask your teacher to observe the procedure and rate your performance using the assessment criteria. (Refer the procedure to the activity sheet 1 .1 and 1.2) Scoring Rubrics

CRITERIA 1. Accuracy (25%)

2. Quality (25%)

3. Method (25%)

4. Speed (25%)

Lamp lights

Lamp lights

Lamp lights but flickers

Needs Improvement (2) Lamp does not light

Wirings are installed and energized. Followed specifications.

Wirings are installed and energized. Missed 1 specification.

Wirings are installed and energized. Missed 2 Specifications.

Wirings are installed and energized. Work is loose and not presentable.

Followed procedure correctly, economical use of tools is followed; and observed safety while working. Submitted work two (2) minutes ahead of time.

Followed procedure correctly, economical use of tools is followed; and observed safety while working. Submitted work on a given time.

Incorrect usage of tools.

Did not follow the required procedures.

Submitted work two (2) or more minutes after the given time.

Unable to finish the work.

Very Good (5)

Good (4)

Rating:  –  5.0 - 4.6 = Very Good - 4.5 - 3.9 = Good  –  3.8 - 3.0 = Fair 2.9 and below = Needs Improvement

112

Fair (3)

IV –  SUMMATIVE QUARTER 2 Test I –  Multiple Choice Direction: Answer the following questions and write your answers on a separate answer sheet. 1. The kind of an electric discharge lamp in which the light is produced by the radiation. Radiation is produced by an excitation of sodium vapor in which the partial pressure of the vapor during operation is of the order of 104 N/m2. a. Large lamps b. Metal halide lamps b. Mercury lamps d. High pressured sodium lamps 2. The kind of an electric discharge lamp in where the light is produced by the radiation. Radiation is from an excited mixture of a metallic vapor (mercury) and the products of the dissociation of halides . a. Large lamps c. Metal halide lamps b. Mercury lamps d. High pressured sodium lamps

3. What kind of an electric discharge lamp in which the major portion of the radiation is produced by the excitation of mercury atoms? a. Large lamps c. Metal halide lamps b .Mercury lamps d. High pressured sodium lamps 4. What class of incandescent lamps is used in photography and projection service? a. Large lamps c. Mercury lamps b. Light Emitting Diode d. Photographic lamps 5. What class of incandescent lamps is normally used for interior and exterior general lighting installation? a. Large lamps c. Miniature lamps b. Light Emitting Diode d. Photographic lamps 6. What class of incandescent lamps is  generally used in automotive, aircraft, and appliance applications? a. Large lamps c. Miniature lamps b. Light Emitting Diode d. Automatic lamps 7. What is a tubular/linear bulb containing mercury vapor and inert gas with phosphor coating inside. a. Compact fluorescent lamp c. Fluorescent Lamp b. Fluorescent tube d. Open type fluorescent 8. A lighting fixture that consists of a glass tube containing mercury vapor (at a low pressure) and inert gas (like argon and krypton), where the interior is coated with phosphor, which glows or fluoresces when exposed to ultraviolet light. 113