Name: _Francisco V. Canapi_________________________________ Date: _16/9/20_____________
Score: ____________
Grade and Section: __12 TVL-I.A________________
GENERAL DIRECTIONS:
1. Erasures are not allowed.
2. Use black or blue ink ball pen only.
3. Focus on your own paper. Anyone who will caught looking at his/her seatmate is
considered cheating.
4. Turn off or silent your phone. No one is allowed to use it while having an exam
5. If you have questions, you can ask your proctor/instructor for clarification.
Multiple Choice: Direction: Choose the correct answer and write only the letter.
B 1. These are sheet metal troughs with hinged or removable covers for housing and protecting wires
and cables and in which conductors are laid in place.
A. Bus ways
B. Wire ways
C. Cable ducts
D. Cable trays
C
2. Most of the required electrical parameters apply to an incandescent bulb are.
A. Rated power and rated voltage
B. Rated resistance and rated current
C. Rated current and rated voltage
D. Rated power and rated current
A 3. When tightening a terminal screw connection, the end of the wire should pass around the screw in
the same direction as the screw is turned so that
A. the wire will act as a locknut
B. any pull on the wire will tighten the screw
C. the wire will not turn off
D. the screw can be removed more easily
B 4. A part providing an appropriate degree protection of equipment against contains external influences
and defined degree of protection against contacts with live parts any direction.
A. Cabinet
B. Enclosure
C. Panel board
D. Switch gear
A 5. Locknut, bushing and connectors are called electrical
.
A. Conduit
B. Fittings
C. Expander
D. Tighteners
A 6. Why is it necessary to use torque wrench is tightening bolted copper bus bars inside bus ducts and
bus ways?
A. To prevent heating of the joints
B. To reduce the resistance in the joint
C. To make sure the joints are well tightened
D. To give the bolt allowance for thermal expansion
C 7. What is the commonly used conduit in Service Entrance?
A. PVC
B. EMT
C. RSC/IMC
D. Flex Conduit
A 8. What is the types of fitting commonly used for exposed conduit support?
A. Conduit strap/Clamp
B. Conduit
C. Connector
D. Lock nut and bushing
B
9. When raceways are exposed to widely different temperatures it should be
A. Sealed
B. Bonded
C. Grounded
D. Isolated
D 10. Before adding to or alternating an installation, you must ensure that
.
A. You are well familiar with the existing installation
B. Such work will not impair any part of the existing installation
C. Safety precautions are followed
D. All of the above
A 11. What will you do if the load schedule reflects a 20AT/2.0-sq.mm? Lighting Branch Circuit of
which breaker is over rated?
A. Wait for your superior and let him do the correction.
B. Look for another load schedule and check for differences.
C. Look for the wiring layout and check groupings.
D. Change rating to 15AT to con firm with PEC requirements
D 12. The size of circuit breaker to be used in 40 A motor full load current is
A. Not less than 125% of the full load
B. More than 115% of the full load
C. Less than 50AT
D. Equal to 100AT
D 13. The selection requirements for circuit breaker are
A. Ampacity, rated power and rated voltage
B. Ampere Frame, Ampacity and Kilo Ampere Interrupting Capacity
C. Kilo Ampere Interrupting Capacity, Ampere Trip and Ampere Frame
D. Ampere Frame, Full load Current and Rated voltage
C
14. When measuring load current, the ammeter is connected
A. parallel with the source
B. in series with the load
C. across the terminals of the load
D. from one load terminal to ground
B 15. The material used in long length bus bar joints to give allowance for thermal expansion is
D
C
A. Annealed soft drawn copper
B. Solid copper plates
C. Flexible braided copper plates
D. Flexible copper plates
16. The current is directly proportional to the voltage and inversely proportional to resistance.
A. Lenz’s Law
B. Power Law
C. Faraday’s Law
D. Ohm’s Law
17. Before adding to or altering an installation, you must ensure that
A. Partially tightened
B. Loosely installed
C. Safety precaution are followed
D. The power is alive
B 18. What amount of current will be drawn by incandescent bulb connected to a 115 volt circuit if its
resistance is 264.5 ohms?
A. 0.45 amps
B. 0.43 amps
C. 0.42 amps
D. 2.3 amps
B 19. When measuring ballast resistance if it is defective or good, it is necessary that the source
A. energized
B. de-energized
C. unloaded
D. loaded
B 20. A circuit breaker is an electrical protective device which
A. protects electrical equipment from incoming spike voltage
B. protects electrical equipment from current surges and overloads
C. breaks power flow when a very low voltage is encountered
D. trips off when a very low current is encountered
D 21. The 24 hours protection for home and commercial building to monitor and access the video any
time anywhere on this devices.
A. Fire alarm System
B. Building Remote Controller
C. Telephone monitoring Cabinet
D. CCTV Camera
A 22. The Auxiliary devices of CCTV that monitor the motion daily.
A. Camera
B. Recorder
C. Monitor
D. Adaptor
D 23. Which of the following is the input devices.
A. Door Lock
B. Exit Button
C. Biometric Reader and Controller
D. All of the above
D 24. A part of Auxiliary devices that capture live events and save as video files
A. Power splitter
B. Camera
C. Monitor
D. Recorder
C 25. The minimum size of conduit commonly used in laying – out of auxiliary devices.
A. ½ diameter
B. ¾ diameter
C. ½ PVC molding
D. ¾ PVC molding
D 26. An electricians should always have his tools in good working condition, the most important
reason being is
A. you have to exert more effort when using defective tools
B. your job cannot be satisfactory done without good tools
C. it is part of your job to keep tools in good working condition
D. defective tools can cause accidents or damage to equipment
D
27. What type of hand tools commonly used in boring of ½ “diameter hole in a panel board?
A. Cold Chisel and a hammer
B. Hacksaw and Hammer
C. Knock out Puncher and Adjustable Wrench
D. Hand drill
A 28. It is the connection between the grounded circuit conductor and the equipment grounding
conductor at the service.
A. Bonding jumper
B. Grounding electrode conductor
C. Bonding jumper, main
D. Bonding jumper, equipment
D 29. What is the fitting commonly used for tightening between the boxes and the RSC conduit?
A. Straight Connector
B. Condulet
C. Conduit strap
D. Lock nut and bushing
D 30. Part of the Auxiliary System that set the motion-trigger action individually for each camera.
A. Live Previewing
B. Recording
C. Camera Scheduled
D. Motion Detection
Test II
Identify the parts of Close Circuit Television and give there function (CCTV) (5 pts.)
BNC
DVR
DVR functions as a recorder and saves files that can be watched time and
time again.
ANALOG CAMERA
It works as a monitoring camera which it captures movements and things.
POWER SUPPLY
MONITOR
VIDEO BALUN
It serves as a power manager for the cctv cameras.
It displays what the camera captures and what dvr records.
It serves as a wiring installation component for the cctv cameras.
Test III
Millions of close circuit television (CCTV) cameras are installed in streets and
businesses throughout the world with the staged goal of reducing crime and
increasing public safety. Assuming that you have a plan to put up your own
business, Distinguish the advantages and disadvantages of having a CCTV to be
installed I your company premises (10 pts.)
The advantages of having a cctv is you’re having an added safety protection for your house, buildings, streets,
compounds that will help to know what is happening in your surroundings and will help you easily detect or
know if a crime is happening.
The disadvantages of having cctv is that, if its corrupted or the installation of cctv’s are not done properly it
might cause dangers and will cost you more than you need. And sometimes cctv recordings can be
manipulated or edited so you can’t be pretty asure that what youre seeing is true.
Test IV
Select the following input and output devices of Fire Detection Alarm System (10 pts.)
Output Devices
● Sirens
● Bells
● Buzzers
● Horns
● Speaker
● LED
● Strobe light
● Flame detectors
● Smoke detectors
● Heat detector
● Fire glass
detector
● Manual Pull
Station ( MPS)
Input Devices
● Voice Drivers
● DVR
● Monitor
● CCTV
● Power supply
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Sirens
Bells
Buzzers
Horns
Voice Drivers
DVR
Monitor
CCTV
Power supply
Speaker
LED
Strobe light
Flame detectors
Smoke detectors
Heat detector
Fire glass detector
Manual Pull Station ( MPS)
Test V
Discuss the step by step procedure of bending and lay-out of pvc conduit. (5 pts.)
1. Make sure safety is ensured, use proper safety gears.
2. Prepare the equipments and the pvc.
3. Use the Heat gun to heat the pvc until it’s flexible and can be bend.
4. When it’s properly heated and felixble bend it into a 90 degrees shape or
offset.
5. When bending it hold it for a seconds and then wipe the bent part with a
wet towel
6. After it’s bent prepare a equipment for lay out such as screw drivers, etc.
7. Use the equipment to put the bent pvc conduit to the panel board.