What is the use of capacitors in fire alarm circuit?

What is the use of capacitors in fire alarm circuit?
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Fire alarm system may be having some electronic devices andcards, in which some capacitors are used. Capacitors are part ofany electronic cards.
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What is the use of capacitors in fire alarm circuit?

Description : What is the use of capacitors in fire alarm circuit?

Last Answer : Fire alarm system may be having some electronic devices andcards, in which some capacitors are used. Capacitors are part ofany electronic cards.

In the schematic of the electrical circuit shown in the illustration, what is the value of the total capacitance, when compared to the value of equal individual capacitors? EL-0038 A. Equal B. Half C. Double D. Squared

Description : In the schematic of the electrical circuit shown in the illustration, what is the value of the total capacitance, when compared to the value of equal individual capacitors? EL-0038 A. Equal B. Half C. Double D. Squared

Last Answer : Answer: C

When replacing component 'B' of the circuit shown in the illustration, it is important to know that ____________. EL-0081 A. it is polarity sensitive and must be inserted as indicated on its base B. there is a danger of phosphor poisoning should 'B''s bulb break C. component 'D' must be closed during the replacement to provide the capacitor's initial charge D. it must match the circuit voltage and component 'C' wattage

Description : When replacing component 'B' of the circuit shown in the illustration, it is important to know that ____________. EL-0081 A. it is polarity sensitive and must be inserted as indicated on its ... provide the capacitor's initial charge D. it must match the circuit voltage and component 'C' wattage

Last Answer : Answer: D

When working on electrical circuits containing large capacitors, in addition to deenergizing the circuit, which of the listed precautions should also be taken? A. Keep all radio equipment away. B. Measure capacitor insulation resistance. C. Ground the capacitor terminals. D. Check capacitor circuit polarity.

Description : When working on electrical circuits containing large capacitors, in addition to deenergizing the circuit, which of the listed precautions should also be taken? A. Keep all radio equipment ... capacitor insulation resistance. C. Ground the capacitor terminals. D. Check capacitor circuit polarity.

Last Answer : Answer: C

As shown in the illustration, 'H1' and 'H2' are ___________. EL-0058 A. fixed capacitors B. variable capacitors C. contacts, closed when the circuit is energized D. contacts, open when the circuit is energized

Description : As shown in the illustration, 'H1' and 'H2' are ___________. EL-0058 A. fixed capacitors B. variable capacitors C. contacts, closed when the circuit is energized D. contacts, open when the circuit is energized

Last Answer : Answer: D

When changing out component 'B' of the circuit shown in the illustration, it is important to know that ____________. EL-0081 A. it is polarity sensitive and must be inserted as indicated on its base B. there is a danger of phosphor poisoning should 'B''s bulb break C. component 'D' must be closed during the replacement to provide the capacitor's initial charge D. it must match the circuit voltage and component 'C' wattage

Description : When changing out component 'B' of the circuit shown in the illustration, it is important to know that ____________. EL-0081 A. it is polarity sensitive and must be inserted as indicated on its ... provide the capacitor's initial charge D. it must match the circuit voltage and component 'C' wattage

Last Answer : Answer: D

To reduce short circuit fault currents are used. (a) reactors (b) resistors (c) capacitors (d) none of the above

Description : To reduce short circuit fault currents are used. (a) reactors (b) resistors (c) capacitors (d) none of the above

Last Answer : (a) reactors

What tool is used to de-energize capacitors in a circuit that has been disconnected from its power source?

Description : What tool is used to de-energize capacitors in a circuit that has been disconnected from its power source?

Last Answer : Shorting probe.

How are synchro capacitors connected in a circuit?

Description : How are synchro capacitors connected in a circuit?

Last Answer : They are delta-connected across the stator windings.

A 10 farad capacitor is used in a circuit. The voltage difference between the plates of the capacitor is 20 volts. What is the magnitude of the charge on each of the capacitor's plates?

Description : A 10 farad capacitor is used in a circuit. The voltage difference between the plates of the capacitor is 20 volts. What is the magnitude of the charge on each of the capacitor's plates?

Last Answer : ANSWER: 200 COULOMBS

Three capacitors 15µf, 18µf and 12µf are connected in a circuit. Find equivalent capacitance when they are connected in – 1) Series 2) Parallel

Description : Three capacitors 15µf, 18µf and 12µf are connected in a circuit. Find equivalent capacitance when they are connected in – 1) Series 2) Parallel

Last Answer : Ans: Value of equivalent capacitance: Given: C1= 15μF, C2=18 µF, C3= 12µF  i)For Series combination of capacitors: 1/Cs = (1/C1)+( 1/C2) +(1/C3) = (1/15)+( 1/18)+( 1/12) 1/Cs = 0.0666+0.0555+0. ... Cs = 4.868 µF   ii) For parallel combination of capacitors: Cp = C1 + C2 + C3 = 15 +18+ 12 = 45 µF 

The circuit has resistors, capacitors and semi-conductor diodes. The circuit will be known as?

Description : The circuit has resistors, capacitors and semi-conductor diodes. The circuit will be known as

Last Answer : The circuit has resistors, capacitors and semi-conductor diodes. The circuit will be known as non-linear circuit.

What is the use of a fire alarm control module ?

Description : What is the use of a fire alarm control module ?

Last Answer : When there is outbreak of fire in a place, it is very useful to help the individual to know what to do when there is fire outbreak it gives alarm

Can distant wildfires trigger your fire alarm?

Description : Can distant wildfires trigger your fire alarm?

Last Answer : Yes they can, it happened in Virginia.

Has anyone ever run fully clothed under a shower that was on because a fire alarm went off and they thought it the only safe place to be?

Description : Has anyone ever run fully clothed under a shower that was on because a fire alarm went off and they thought it the only safe place to be?

Last Answer : Uh, no.

Has anyone run buck naked, out of a shower, from a fire alarm?

Description : Has anyone run buck naked, out of a shower, from a fire alarm?

Last Answer : Surely it has, to someone, sometime. It never happened to me, but I was staying in a small hotel once when a fire alarm went off after midnight and I was only able to grab a coat ... That was pretty interesting. Nobody unclothed, though. I'm sure somebody would have contributed a blanket or jacket.

Has anyone run out naked from the fire alarm?

Description : Has anyone run out naked from the fire alarm?

Last Answer : Not me. An alarm was triggered though when I ran out naked.

Should every university or public place be equiped with an upgraded fire alarm?

Description : Should every university or public place be equiped with an upgraded fire alarm?

Last Answer : answer:No. For several reasons. 1) Many jurisdictions have a 911 center that deals with the triage (who to send - police, fire, whatever) already. This would be, to some extent, duplicating the effort ... don't think it is), who is going to pay for retrofitting the millions of alarms already there?

What does "alarm" mean, as in "2-alarm fire"?

Description : What does "alarm" mean, as in "2-alarm fire"?

Last Answer : ‘A two alarm fire is a fire that is too much for one firehouse’s resources to handle. When multiple agencies or groups are called in, the alarm count increases. Two firehouses are called in, vs. three, four or five.

What are they doing when they check my fire alarm?

Description : What are they doing when they check my fire alarm?

Last Answer : I would guess he had something like this: http://www.hoyles.com/acatalog/solo-detector-testers.html (about ¼ the way down the page) The detector was probably a CO-type detector, so he had to ... concentration you need a little more. It's a bit higher-quality test than just pushing the test button.

What are the 4 basic parts of a fire alarm?

Description : What are the 4 basic parts of a fire alarm?

Last Answer : Fire alarm control panel - the system hub monitors inputs and system integrity, controls outputs and relays information. Primary power supply - primary power for your fire alarm system is usually supplied in the ... that make it easier for people to get out of the building once a fire has started.

How do I fix my fire alarm?

Description : How do I fix my fire alarm?

Last Answer : These are the few steps : 1. Turn off the smoke alarm at the circuit breaker. 2. Remove the smoke alarm from mounting bracket and disconnect the power . 3. Remove the battery. 4. Reconnect the battery and reinstall the battery.

What is the main purpose of fire alarm systems, and how do they work?

Description : What is the main purpose of fire alarm systems, and how do they work?

Last Answer : The main job of fire alarm system is to detect an occurrence, alert the control panel and proper authorities, and notify the occupants to take action. The fire alarm panel is connected to the system' ... manual pull station, alerting the fire alarm system to the fire and putting it in alarm mode.

What are the world-famous fire alarm brands?

Description : What are the world-famous fire alarm brands?

Last Answer : Commercial fire alarm systems is a utility rarely considered in the mindset of, what do we need to have and what is the most cost effective way to meet that requirement . The good news is ... * ( Some Panel Versions ) +Interlogix Fireworx +Space Age Electronics +Wheelock +System Sensor +Edwards FSA

What is the fire alarm system to protect property?

Description : What is the fire alarm system to protect property?

Last Answer : Fire Alarm Systems are essential to life safety and fire safety Fire is one of the most destructive and dangerous elements to human life and property. One of the best ways to stop a fire ... detectors that alert building occupants that a fire may be present so they can safely evacuate the building.

How to test my fire alarm at home?

Description : How to test my fire alarm at home?

Last Answer : Press and hold the test button on the smoke detector. It can take a few seconds to begin, but a loud, ear-piercing siren should emanate from the smoke detector while the button is pressed. If the sound is weak or nonexistent, replace your batteries.

What is the principle of a fire alarm?

Description : What is the principle of a fire alarm?

Last Answer : All Fire Alarm Systems essentially operate on the same principle. If a detector detects smoke or heat, or someone operates a break glass unit, then alarm sounders operate to warn others in the building that there may be a fire and to evacuate.

How much does it cost to install a fire alarm system?

Description : How much does it cost to install a fire alarm system?

Last Answer : The average installation cost of a fire alarm system is between $2 and $3 per square foot for new construction. An existing building is more expensive, range between $4 to $12 per square foot. Besides ... , sensor and siren. The total cost of installing a full alarm system is between $650 and $950.

What kind of fire alarm should I buy?

Description : What kind of fire alarm should I buy?

Last Answer : The most common type of residential smoke alarm is dual ionisation alarm. It detects the Invisible gases given out in fire like burning toast or cooking bacon. Price :- 25 USD Second one is ... . Price 40USD The best one are dual monitor, which gives both The dual ionisation and photoelectric type

What features are required in a fire alarm system?

Description : What features are required in a fire alarm system?

Last Answer : The objective of a fire alarm system is to detect a fire outbreak as soon as one occurs and alert the occupants immediately. Therefore when purchasing a fire alarm system you need a reliable ... a notification system which is loud and visible enough to alert almost every occupants in the building.

What type of fire alarm system should I install?

Description : What type of fire alarm system should I install?

Last Answer : Photoelectric smoke detectors are the best at detecting the large particles typical of smoky, smoldering fires but poor at detecting fast, flaming fires. Photoelectric units are less prone to false alarms from burnt food, so they may be a better fit in kitchen areas.

Which wire is used in fire alarm system?

Description : Which wire is used in fire alarm system?

Last Answer : Copper Conductors For fire alarm systems, only copper conductors can be used. Conductor of sizes 18 AWG and 16 AWG can be used if the load does not exceed the ampacities specified in 402.5

How can I choose the right fire alarm system?

Description : How can I choose the right fire alarm system?

Last Answer : You can choose the right fire alarm system in the below-mentioned ways: Accessing your building's risks and threats: Identify the various risks and loopholes within your building and decide how ... needs: This includes sirens, speakers, flashing lights, etc. Determine the monitoring system needed.

What are the benefits of having a fire alarm?

Description : What are the benefits of having a fire alarm?

Last Answer : Speedy Fire detection The fire alarm starts to give a signal if smoke/ fire has been detected thus you will be able to call or signal the fire station or department ASAP or you will be ... smoke. lessen the chance of fire damage Early detection can save lives and damages. Economical low maintenance

How beneficial is installing fire alarm systems?

Description : How beneficial is installing fire alarm systems?

Last Answer : The main advantage of stalling fire alarms is the early warning benefit. The fire alarms can be installed just about anywhere in a commercial building and best of all the fire safety measure is highly cost effective for smoke and fire protection.

What are the functions of a fire alarm monitoring center?

Description : What are the functions of a fire alarm monitoring center?

Last Answer : Telgian, they will do all the required fire alarm system inspections to ensure everything works as it's suppose A file without content cannot be uploaded. Telgian contact details to.

How loud is a Fire alarm decibel?

Description : How loud is a Fire alarm decibel?

Last Answer : Just tested our work alarm and it read 95db.

Why 0.04 micro farad capacitor is used in a thermistor based fire alarm?

Description : Why 0.04 micro farad capacitor is used in a thermistor based fire alarm?

Last Answer : Need answer

What do I need to know about automatic fire alarm systems in rehabbing an old warehouse?

Description : What do I need to know about automatic fire alarm systems in rehabbing an old warehouse?

Last Answer : In terms of automatic fire alarm systems in rehabbing an old warehouse, you should activate the facility fire evacuation alarm system. Another thing you should know is make sure to have an automatic sprinkler system connected to the fire alarm system

Secure Your PC With The Zone Alarm Free Fire wall?

Description : Secure Your PC With The Zone Alarm Free Fire wall?

Last Answer : internet security is growing more important every day. Computers belonging to everyone from the casual home user to the Defense Department analysts are routinely compromised. The primary threat faced by most ... that users will see how good their program is and then purchase the premium version.

Impressed current cathodic protection is used on vessels instead of _________________. A. fire alarm systems B. repeated painting C. sacrificial zincs D. vacuum tube degaussing systems

Description : Impressed current cathodic protection is used on vessels instead of _________________. A. fire alarm systems B. repeated painting C. sacrificial zincs D. vacuum tube degaussing systems

Last Answer : Answer: C

Hearing the fire / emergency alarm what should be done? Or What will you do after hearing the emergency alarm? Or Hearing the emergency alarm what will you do?

Description : Hearing the fire / emergency alarm what should be done? Or What will you do after hearing the emergency alarm? Or Hearing the emergency alarm what will you do?

Last Answer :  For emergency condition arise  Stop the work  Stop the equipment  Asked to move personnel at Assembly point  Inform to area authorizes  Suspend the permit

Due to the operating characteristics of the system, time lag fuses (or dual-element fuses) are necessary for use in _____________. A. main lighting circuits B. motor starting circuit C. emergency lighting circuits D. general alarm circuits

Description : Due to the operating characteristics of the system, time lag fuses (or dual-element fuses) are necessary for use in _____________. A. main lighting circuits B. motor starting circuit C. emergency lighting circuits D. general alarm circuits

Last Answer : Answer: B

In the illustration, the signal from the device connected to terminals 18 and 19 is __________. EL-0046 A. prime mover speed feedback B. loss of control alarm when comparing with the input signal from the resistor at the top of the speed sensing circuit card C. hall effect current to detect slip between the prime mover and the alternator D. to shut down the prime mover if overspeeding

Description : In the illustration, the signal from the device connected to terminals 18 and 19 is __________. EL-0046 A. prime mover speed feedback B. loss of control alarm when comparing with the input signal ... slip between the prime mover and the alternator D. to shut down the prime mover if overspeeding

Last Answer : Answer: A

When a console indicating lamp burns out, attempts to renew it should not be made while maneuvering because _______________. A. the new lamp may be of a higher wattage and cause heat damage to the lens B. removing a faulty lamp usually causes an alarm to sound on the bridge C. attention should be paid only to engine orders D. a socket/wiring fault may cause a ground or short circuit to shut down a vital function

Description : When a console indicating lamp burns out, attempts to renew it should not be made while maneuvering because _______________. A. the new lamp may be of a higher wattage and cause heat damage to the lens ... D. a socket/wiring fault may cause a ground or short circuit to shut down a vital function

Last Answer : Answer: D

An open-circuit fault between the pressure switch and the 'annunciator module' shown in the illustration would cause the alarm circuit to react in the same manner as if ___________. EL-0094 A. 3.5 volts were applied to the 'setpoint module' B. 'reduction gear lube oil pressure' fell below switch setting C. 50 PSI were applied to the 'setpoint module' D. the pressure switch closed

Description : An open-circuit fault between the pressure switch and the 'annunciator module' shown in the illustration would cause the alarm circuit to react in the same manner as if ___________. EL-0094 A. 3.5 ... below switch setting C. 50 PSI were applied to the 'setpoint module' D. the pressure switch closed

Last Answer : Answer: B

What is a self-monitoring alarm circuit?

Description : What is a self-monitoring alarm circuit?

Last Answer : It self monitors the health of the alarm circuit. That is, it senses whether the power supply to the alarm circuit is healthy and all the relays and contacts are functioning normally. Check with E/O for more details.

Alarm at morning circuit

Description : The circuit automatically start making sound when light falls on it.

Last Answer : This circuit make sound when light fall on LDR.