Electrical Engineering

The fluorescent bulb produces light by:

The fluorescent bulb produces light by:

[html]The fluorescent bulb produces light by:

▸ heating a filament to a white-heat temperature.

▸ a chemical reaction.

▸ means of a vaporized mercury conduction path between two cathodes.

▸ means of magnet inductio

swimchk13   44   1 Reply

thevoicexxx

The filament on an incandescent lamp is made of

The filament on an incandescent lamp is made of

The filament on an incandescent lamp is made of

▸ copper.

▸ tungsten.

▸ aluminum.

▸ brass.

Septeos   41   1 Reply

pigglyoink14

The device shown is aThomas & Betts Corporation

The device shown is aThomas & Betts Corporation

[html]The device shown is a

got2pass   31   1 Reply

eggr0ll

The ballast shown is a(n) ________ type.

The ballast shown is a(n) ________ type.

[html]The ballast shown is a(n) ________ type.

henry11   31   1 Reply

Jaynie

The ballast in a fluorescent lamp circuit is used to

The ballast in a fluorescent lamp circuit is used to

The ballast in a fluorescent lamp circuit is used to

▸ produce a jolt of high voltage.

▸ vaporize the mercury inside the lamp.

▸ limit the tube operating current.

▸ All of the answers are correct.

NinjaRick   30   1 Reply

Tram Nguyen

High-intensity discharge lamps:

High-intensity discharge lamps:

[html]High-intensity discharge lamps:

▸ operate without the use of a ballast.

▸ operate ON and OFF very quickly.

▸ require some time to produce light when first turned on.

▸ operate without the use of a ballast and

cmartinez034   34   1 Reply

chanelfargesen

For the switch shown, the arrow points to the ________ terminal.

For the switch shown, the arrow points to the ________ terminal.

[html]For the switch shown, the arrow points to the ________ terminal.

xiaoyu000   31   1 Reply

pedro0811

For the circuit shown, the two switches used are ________ switches.

For the circuit shown, the two switches used are ________ switches.

[html]For the circuit shown, the two switches used are ________ switches.

billafin   28   1 Reply

daniboi

For the circuit shown, the lights are connected

For the circuit shown, the lights are connected

[html]For the circuit shown, the lights are connected

nitnit   32   1 Reply

silvermoon197

For the circuit shown, switch three is a ________ switch.

For the circuit shown, switch three is a ________ switch.

[html]For the circuit shown, switch three is a ________ switch.

imomo   34   1 Reply

penmc

For the circuit shown, switch 2 is a ________ switch.

For the circuit shown, switch 2 is a ________ switch.

[html]For the circuit shown, switch 2 is a ________ switch.

Anthonyling   30   1 Reply

miemitch

For LEDs, what percent of the energy they consume is used to create visible light?

For LEDs, what percent of the energy they consume is used to create visible light?

For LEDs, what percent of the energy they consume is used to create visible light?

▸ 100 percent

▸ 80 percent

▸ 60 percent

▸ 20 percent

tw1gg   31   1 Reply

yankeesaremyjam

For incandescent bulbs, what percent of the energy they consume is used to create visible light?

For incandescent bulbs, what percent of the energy they consume is used to create visible light?

For incandescent bulbs, what percent of the energy they consume is used to create visible light?

▸ 100 percent

▸ 90 percent

▸ 60 percent

▸ 10 percent

make7upurs   27   1 Reply

dressagegal1

When a relay coil indicator light is ON this normally indicates that the load has power.

When a relay coil indicator light is ON this normally indicates that the load has power.

When a relay coil indicator light is ON this normally indicates that the load has power.

▸ true

▸ false

mdensmore   32   1 Reply

kyuhalee1

Time delay relays are control relays with a time delay built into them.

Time delay relays are control relays with a time delay built into them.

Time delay relays are control relays with a time delay built into them.

▸ true

▸ false

zitze   34   1 Reply

flipninjamel

The two basic parts of an electromechanical relay are the coil and the contacts.

The two basic parts of an electromechanical relay are the coil and the contacts.

The two basic parts of an electromechanical relay are the coil and the contacts.

▸ true

▸ false

Science220   29   1 Reply

jgunn88

The coil and contacts of an electromagnetic relay are not normally electrically insulated from each other.

The coil and contacts of an electromagnetic relay are not normally electrically insulated from each other.

The coil and contacts of an electromagnetic relay are not normally electrically insulated from each other.

▸ true

▸ false

dbomb1   25   1 Reply

jaimielavie

Solid-state relays have a much slower response time than electromechanical relays.

Solid-state relays have a much slower response time than electromechanical relays.

Solid-state relays have a much slower response time than electromechanical relays.

▸ true

▸ false

dalvirb   32   1 Reply

miil41

Latching relay contacts will not retain their setting after a power failure.

Latching relay contacts will not retain their setting after a power failure.

Latching relay contacts will not retain their setting after a power failure.

▸ true

▸ false

cjr4808   32   1 Reply

ydnam23

Contactors are used in conjunction with low current pilot devices to automatically control high ...

Contactors are used in conjunction with low current pilot devices to automatically control high ...

Contactors are used in conjunction with low current pilot devices to automatically control high current loads.

▸ true

▸ false

Dante52   36   1 Reply

austsier

A single-coil magnetic latching relay uses a permanent magnet to hold the contacts in the latch position.

A single-coil magnetic latching relay uses a permanent magnet to hold the contacts in the latch position.

A single-coil magnetic latching relay uses a permanent magnet to hold the contacts in the latch position.

▸ true

▸ false

viva902   35   1 Reply

Sagxar

Which of the following is not an application for a relay?

Which of the following is not an application for a relay?

[html]Which of the following is not an application for a relay?

▸ change alternating current to direct current

▸ control a 120-V lighting circuit with a 24- V control circuit

▸ control several switching operations by a sin

bigben0007   31   1 Reply

astroasis

The two circuits associated with a relay are the ________ circuit and the ________ circuit.

The two circuits associated with a relay are the ________ circuit and the ________ circuit.

The two circuits associated with a relay are the ________ circuit and the ________ circuit.

▸ open; closed

▸ in; out

▸ control; load

▸ primary; secondary

shahabkhon   33   1 Reply

neginakbarin

The relay contact switching arrangement shown is

The relay contact switching arrangement shown is

[html]The relay contact switching arrangement shown is

ktpizzle1993   29   1 Reply

dm408

The manual override button on a relay is used to

The manual override button on a relay is used to

The manual override button on a relay is used to

▸ reset the relay.

▸ energize the relay coil.

▸ turn on the relay indicator light.

▸ manually move the contacts to their energized position.

annyan   25   1 Reply

culwri204

Solid-state relays use ________ as switching devices.

Solid-state relays use ________ as switching devices.

Solid-state relays use ________ as switching devices.

▸ semiconductors

▸ coils

▸ contacts

▸ permanent magnets

mregueral   27   1 Reply

toastercat

Relays with no contacts, which are switched entirely by electronic devices, are called:

Relays with no contacts, which are switched entirely by electronic devices, are called:

Relays with no contacts, which are switched entirely by electronic devices, are called:

▸ electromechanical relays.

▸ solid-state relays.

▸ hybrid relays.

▸ magnetic relays.

atomicyoyo   30   1 Reply

apina

Normally-open relay contacts are defined as those contacts that are ________ when the coil is ________.

Normally-open relay contacts are defined as those contacts that are ________ when the coil is ________.

Normally-open relay contacts are defined as those contacts that are ________ when the coil is ________.

▸ open; deenergized

▸ open; energized

▸ closed; deenergized

▸ closed; energized

CLopez678   28   1 Reply

shandaman13

Normally-closed relay contacts are defined as those contacts that are ________ when the coil is ________.

Normally-closed relay contacts are defined as those contacts that are ________ when the coil is ________.

Normally-closed relay contacts are defined as those contacts that are ________ when the coil is ________.

▸ open; deenergized

▸ open; energized

▸ closed; deenergized

▸ closed; energized

manonvsb   24   1 Reply

Nfernandez1991

For the solid-state relay circuit shown, the transistor acts like the ________ of the ...

For the solid-state relay circuit shown, the transistor acts like the ________ of the ...

[html]For the solid-state relay circuit shown, the transistor acts like the ________ of the electromechanical relay.

jake82   30   1 Reply

Mspractical

For the solid-state relay circuit shown, the ________ provides electrical isolation between control ...

For the solid-state relay circuit shown, the ________ provides electrical isolation between control ...

[html]For the solid-state relay circuit shown, the ________ provides electrical isolation between control and load circuits.

Pats2010   30   1 Reply

eminemluvr87

For the solid-state on-delay timer shown, when the external trigger circuit contacts close the ...

For the solid-state on-delay timer shown, when the external trigger circuit contacts close the ...

[html]For the solid-state on-delay timer shown, when the external trigger circuit contacts close the output contact

tw1gg   32   1 Reply

solid1

For the relay shown, contacts #1 are the ________ contacts.

For the relay shown, contacts #1 are the ________ contacts.

[html]For the relay shown, contacts #1 are the ________ contacts.

ya-yaa   35   1 Reply

carducb

Contacts of electromechanical timing relays are designed to operate at a present time interval

Contacts of electromechanical timing relays are designed to operate at a present time interval

[html]Contacts of electromechanical timing relays are designed to operate at a present time interval

▸ after the coil is energized.

▸ after the coil is deenergized.

▸ after power is applied to the circuit.

▸ either

jccruz   29   1 Reply

awbradshaw

An electromechanical relay is basically:

An electromechanical relay is basically:

[html]An electromechanical relay is basically:

▸ an electromagnet used to switch contacts.

▸ an electromagnet used to operate motors.

▸ an electronic circuit used to switch circuits.

▸ a device designed to relay in

mlee52381   33   1 Reply

hadu582

________ conditions in an electrical power system may cause damage to equipment or harm to personnel.

________ conditions in an electrical power system may cause damage to equipment or harm to personnel.

________ conditions in an electrical power system may cause damage to equipment or harm to personnel.

▸ Lighting

▸ Space

▸ Normal

▸ Abnormal

manonvsb   28   1 Reply

jmmiller

With selective coordination of overcurrent devices, only the protective device nearest the faulted ...

With selective coordination of overcurrent devices, only the protective device nearest the faulted ...

With selective coordination of overcurrent devices, only the protective device nearest the faulted circuit opens.

▸ true

▸ false

Trey4sho   27   1 Reply

DPhoenix

When a fuse blows, replacing it usually corrects the problem.

When a fuse blows, replacing it usually corrects the problem.

When a fuse blows, replacing it usually corrects the problem.

▸ true

▸ false

nitanikollaj   34   1 Reply

realistpnoy

When a complete circuit is short-circuited, its total resistance is near zero ohms.

When a complete circuit is short-circuited, its total resistance is near zero ohms.

When a complete circuit is short-circuited, its total resistance is near zero ohms.

▸ true

▸ false

booboo123   38   1 Reply

iffn23

Thermal-magnetic circuit breakers include both a magnetic-tripping function, for short-circuit ...

Thermal-magnetic circuit breakers include both a magnetic-tripping function, for short-circuit ...

Thermal-magnetic circuit breakers include both a magnetic-tripping function, for short-circuit protection, and a thermal-tripping function, for overload protection.

▸ true

▸ false

rasnulx   24   1 Reply

sherbiejr16