G2 EXAM part 1

Question

Schedule 80 pipe is required in a propane system:

Answer 1

for propane vapour under 125 psig (860 kPa) working pressure

Answer 2

when steel piping is to be connected to plastic piping

Answer 3

for propane vapour over 125 psig (860 kPa) working pressure

Answer 4

when copper piping is to be connected to plastic pipe

Answer 5

with yellow paint or yellow bands

Answer 6

with red paint or red bands

Answer 7

with paint in a contrasting colour to other pipes

Answer 8

with green paint and yellow bands

Answer 9

electrical loads in the circuits from that panel

Answer 10

loads in the circuit served by that breaker

Answer 11

240 volt circuits served by that breaker panel

Answer 12

120 volt circuits served by that breaker panel

Answer 13

size of the wire

Answer 14

the length of the wire

Answer 15

voltage supplied to the appliance

Answer 16

type of insulation on the wire

Answer 17

60/24 volt step down transformer

Answer 18

120/24 volt step down transformer

Answer 19

240/24 step down transformer

Answer 20

240/120 volt step down transformer

Answer 21

to the right of the loads

Answer 22

above the loads

Answer 23

below the loads

Answer 24

to the left of the loads

Answer 25

240/2/60 

Answer 26

remains the same

Answer 27

varies directly

Answer 28

remains the same

Answer 29

fluctuates

Answer 30

the orifice is too small

Answer 31

there is a lack of air

Answer 32

there is excessive draft at the pilot location

Answer 33

high gas pressure

Answer 34

only from the load directly to the source

Answer 35

in one direction only

Answer 36

only from the source directly to the load

Answer 37

across the load only

Answer 38

appliance overload

Answer 39

dead shorts

Answer 40

short circuits

Answer 41

current flow to ground

Answer 42

disconnect closed with all devices as though the heating is on

Answer 43

disconnect closed with all devices as though there is a call for heating but the heating has not yet come on

Answer 44

disconnect open with all devices as though there is a call for heating

Answer 45

disconnect open with all devices as though there is no call for heating

Answer 46

the coil is good

Answer 47

the coil is shorted to the casing of the device

Answer 48

the coil wire is broken

Answer 49

all of the available choices

Answer 50

remains the same

Answer 51

varies directly

Answer 52

only when it carries 24 volts or less

Answer 53

only when the switch is 3 feet or less from the appliance

Answer 54

only when the supply is 240 volts

Answer 55

SPST (single pole single throw)

Answer 56

SPDT (single pole double throw)

Answer 57

DPST (single pole single throw)

Answer 58

DPDT (double pole double throw)

Answer 59

finger tight

Answer 60

¼ turn past finger tight

Answer 61

1 ½ turns past finger tight

Answer 62

two turns with a wrench

Answer 63

resistance increases

Answer 64

resistance decreases

Answer 65

resistance remains the same

Answer 66

resistance fluctuates

Answer 67

30 square inches (1,800 mm2)

Answer 68

60 square inches (3,900 mm2)

Answer 69

120 square inches (7,800 mm2)

Answer 70

180 square inches (11,600 mm2)

Answer 71

3/32” (2 mm)

Answer 72

1/8” (3 mm)

Answer 73

1/4” (6 mm)

Answer 74

1/2" (12 mm)

Answer 75

carbon dioxide

Answer 76

water vapour

Answer 77

humidification

Answer 78

infiltration

Answer 79

filtration

Answer 80

exfiltration

Answer 81

add attic insulation

Answer 82

install new windows

Answer 83

seal air leaks

Answer 84

install a heat recovery unit

Answer 85

filter the air in the house

Answer 86

ventilate the house

Answer 87

install mechanical attic ventilation

Answer 88

humidify the air in the house

Answer 89

5 Pa (- 0.02” w.c.)

Answer 90

10 Pa (- 0.04” w.c.)

Answer 91

15 Pa (- 0.06” w.c.)

Answer 92

20 Pa (- 0.08” w.c.)

Answer 93

after confirming the heat exchanger is not cracked, advise the customer to call for someone else

Answer 94

recommend that a window be left open a bit

Answer 95

advise the customer that the problem will disappear when the building dries out

Answer 96

recommend the installation of a mechanical ventilation system

Answer 97

relative humidity will increase

Answer 98

relative humidity will decrease

Answer 99

heat gain will occur

Answer 100

heat loss will decrease

Answer 101

reducing relative humidity to approximately 10%

Answer 102

increasing relative humidity to approximately 80%

Answer 103

filtering the air in the house

Answer 104

covering earthen floors and open water surfaces

Answer 105

seal the ductwork in the furnace area

Answer 106

balance the volume of return and supply air in each room or floor

Answer 107

ensure a tight seal around the furnace filter and blower door

Answer 108

all of the available choices

Answer 109

double brick

Answer 110

solid brick

Answer 111

protect the underlying materials

Answer 112

reduce heat gain

Answer 113

improve resistance to vapour flow

Answer 114

maintain the depressurization limit

Answer 115

outside environment

Answer 116

all of the available choices

Answer 117

5 inches (125 mm)

Answer 118

12 inches (300 mm)

Answer 119

15 inches (375 mm)

Answer 120

18 inches (450 mm)

Answer 121

provides ignition

Answer 122

mixes air and gas

Answer 123

protects the igniter

Answer 124

changes a blue flame to a luminous flame

Answer 125

1 inches (25 mm)

Answer 126

3 inches (75 mm)

Answer 127

6 inches (150 mm)

Answer 128

9 inches (225 mm)

Answer 129

28 MSG (0.3 mm) sheet metal spaced out 0.25 inch (6 mm)

Answer 130

28 MSG (0.3 mm) sheet metal applied directly to the combustible material

Answer 131

1/4 inch (6 mm) asbestos millboard

Answer 132

no protection required

Answer 133

allow the regulator to breath

Answer 134

reduce the opening speed of the regulator

Answer 135

limit the escape of gas to 1 cu. ft./hour

Answer 136

stop the regulator from operating if it is over pressurized

Answer 137

mounted securely to the roof of the vehicle

Answer 138

mounted on an “A” frame as close to the front of the vehicle as practicable

Answer 139

secured ahead of the front bumper

Answer 140

secured to the rear of the vehicle

Answer 141

is a redundant regulator which backs up the operating regulator

Answer 142

controls gas flow to the top of the diaphragm

Answer 143

reduces pressure from pounds to ounces

Answer 144

remains locked off until it is required

Answer 145

11.0” w.c.

Answer 146

the same size as the orifice used for natural gas

Answer 147

larger than the orifice used for natural gas

Answer 148

smaller than the orifice used for natural gas

Answer 149

< 3% the size of the orifice used for natural gas

Answer 150

the service regulator is malfunctioning

Answer 151

the static pressure is excessive

Answer 152

the working pressure is low

Answer 153

the piping is not gas tight

Answer 154

advise the customer to provide protection as soon as possible

Answer 155

notify the local gas utility that protection is required

Answer 156

advise the customer to contact the local gas utility

Answer 157

report the situation to the Technical Standard and Safety Authority immediately

Answer 158

the downstream pressure will remain the same

Answer 159

the downstream pressure will decrease

Answer 160

the upstream pressure will increase

Answer 161

the upstream pressure will decrease

Answer 162

multiplying the appliance input by 1.5 and selecting a regulator in that input range

Answer 163

checking the appliance rating plate and selecting a regulator for that input range

Answer 164

determining the pipe size of the appliance manifold and selecting a regulator in that input range

Answer 165

multiplying the appliance input by 1.25 and selecting a regulator in that input range

Answer 166

ammonia and helium

Answer 167

ammonia and hydrogen

Answer 168

ammonia and propane

Answer 169

ammonia and butane

Answer 170

generator, evaporator, radiator, absorber

Answer 171

generator, evaporator, capacitor, absorber

Answer 172

generator, evaporator, compressor, absorber

Answer 173

generator, evaporator, absorber, condenser

Answer 174

no, unless the vehicle is only being moved to a more level location

Answer 175

yes, if the vehicle is being moved 1 mile or less

Answer 176

by using a flue gas analyzer and visual examination

Answer 177

by using a carbon monoxide detector and visual examination

Answer 178

by using a smoke generator and visual examination

Answer 179

all of the available choices

Answer 180

to provide a safety margin

Answer 181

to provide a higher efficiency

Answer 182

to maintain a neutral pressure point at the door catch

Answer 183

to maintain a low stack temperature

Answer 184

downstream of the draft hood

Answer 185

upstream of the draft hood

Answer 186

plus the ambient temperature

Answer 187

minus the ambient temperature

Answer 188

burner and the appliance

Answer 189

burner and the appliance downdraft

Answer 190

venting system

Answer 191

advise the user in writing of the procedure to follow to discontinue the supply of the former form of energy

Answer 192

remove all aspects of the previous installation

Answer 193

remove the electrical supply wiring from the panel

Answer 194

advise the previous energy supplier of the change

Answer 195

use 0.05” (12 mm) insulating millboard spaced out 0.05 (12 mm) with noncombustible spacers

Answer 196

use 0.25” (6 mm) insulating millboard spaced out 1” (25 mm)

Answer 197

use 22 gauge sheet metal attached to the hot side of the-combustible material

Answer 198

use 28 gauge sheet metal spaced out 1” (25 mm) from the combustible material

Answer 199

the unit will overfire

Answer 200

the burner will short cycle

Answer 201

the burner efficiency will be affected

Answer 202

the burner will not fire

Answer 203

downstream of the draft hood

Answer 204

upstream of the draft hood

Answer 205

plus the ambient temperature

Answer 206

minus the ambient temperature

Answer 207

detector is within the manufacturer’s date code

Answer 208

sample tube is within the manufacturer’s date code

Answer 209

detector has been inspected and verified

Answer 210

the sample tube is CGA approved

Answer 211

18” (450 mm)

Answer 212

24” (600 mm)

Answer 213

36” (900 mm)

Answer 214

48” (1200 mm)

Answer 215

150°F (66°C)

Answer 216

200°F (90°C)

Answer 217

250°F (120°C)

Answer 218

350°F (180°C)

Answer 219

the percentage of CO2 will increase and the stack temperature will increase

Answer 220

the percentage of CO2 will decrease and the stack temperature will increase

Answer 221

the percentage of CO2 will decrease and the stack temperature will decrease

Answer 222

the percentage of CO2 will increase and the stack temperature will decrease

Answer 223

1” (25 mm)

Answer 224

3” (75 mm)

Answer 225

6” (150 mm)

Answer 226

12” (300 mm)

Answer 227

by comparing it to a second sample

Answer 228

by comparing it to a known sample

Answer 229

by checking it against a gas meter test dial

Answer 230

by checking it against the appliance manufacturers maximum input rating

Answer 231

at least 6” (150 mm)

Answer 232

less than 12” (300 mm)

Answer 233

at least 12” (300 mm)

Answer 234

at least 24” (600 mm)

Answer 235

pulsation will occur

Answer 236

there will be poor efficiency

Answer 237

the limit control will be ineffective

Answer 238

the high limit switch will open

Answer 239

3” (75 mm)

Answer 240

6” (150 mm)

Answer 241

12” (300 mm)

Answer 242

18” (450 mm)

Answer 243

remove the valve and clean off the calcium deposits

Answer 244

replace the valve seat and check for the cause of the activation

Answer 245

replace the relief valve and check for the cause of the activation

Answer 246

open a tap and relieve the tank pressure until the flow stops at the relief valve

Answer 247

75 psig (517 kPa)

Answer 248

100 psig (690 kPa)

Answer 249

150 psig (1034 kPa)

Answer 250

200 psig (1380 kPa)

Answer 251

in the insulated but unheated attached garage

Answer 252

the water heater in the basement and the air handler in the attic

Answer 253

together in a central location in the basement

Answer 254

the air handler supported on top of a rear flue water heater in a closet space

Answer 255

temperature and pressure relief valve

Answer 256

95% to 105%

Answer 257

43°C (110°F)

Answer 258

49°C to 54°C (120°F to 130°F)

Answer 259

60°C to 66°C (140°F to 150°F)

Answer 260

83°C (180°F)

Answer 261

anti-scald device and a pump control

Answer 262

pump, pump control, flow switch, temperature/pressure relief valve, and a limit control

Answer 263

E.C.O., temperature and pressure relief valve, anode, and a dip tube

Answer 264

temperature and pressure relief valve, anode, and a limit control

Answer 265

higher than the outlet temperature from the water heater

Answer 266

no more than 5°C (9°F) below the outlet temperature from the water heater

Answer 267

lower than the minimum temperature required to activate the burner

Answer 268

at least the set temperature of the domestic hot water supply

Answer 269

soap or detection instrument using an inert gas using table 8.25.2 to determine test pressure and duration

Answer 270

soap or detection instrument at the normal working pressure

Answer 271

soap or detection instrument at 2 times the normal working pressure

Answer 272

soap or detection instrument and a 10 minute dial test or leak test at normal working pressure

Answer 273

aquastat on the water heater

Answer 274

balancing valve on the heating loop

Answer 275

mixing valve on the heating loop

Answer 276

mixing valve on the domestic hot water system

Answer 277

a defective thermostat

Answer 278

long draws of water

Answer 279

a dip tube which is too short

Answer 280

too low a thermostat setting

Answer 281

only after being cleaned with muriatic acid

Answer 282

only after having been descaled

Answer 283

direct vent

Answer 284

power vent

Answer 285

fan assisted

Answer 286

revertible flue

Answer 287

only when the hose is less than 10 feet long

Answer 288

only when a flex connector is used

Answer 289

A voltmeter

Answer 290

A manometer

Answer 291

An anemometer

Answer 292

A tachometer

Answer 293

high limit switch

Answer 294

roll out switch

Answer 295

air proving switch

Answer 296

ignition switch

Answer 297

18 inches (450 mm)

Answer 298

2 feet (600 mm)

Answer 299

4.5 feet (1500 mm)

Answer 300

6 feet (2 m)

Answer 301

there is water in the boiler

Answer 302

the temperature controller is set properly

Answer 303

the main burner test firing valve is turned on

Answer 304

the safety valves are open

Answer 305

intermittently

Answer 306

continuously for 24 hours

Answer 307

continuously until the thermostat is satisfied

Answer 308

one hour on and one hour off until the thermostat is satisfied

Answer 309

upstream of the heater

Answer 310

downstream of the heater

Answer 311

upstream of the filter

Answer 312

downstream of the filter

Answer 313

the space temperature will be too high

Answer 314

the space temperature will be too low

Answer 315

the burner will run until the desired space temperature is achieved

Answer 316

the circulating pump will run continuously

Answer 317

flue gas temperature

Answer 318

water temperature

Answer 319

stack temperature

Answer 320

air temperature

Answer 321

shutting off the pump

Answer 322

viewing the burner flame size

Answer 323

determining the appliance input

Answer 324

determining the temperature rise across the appliance

Answer 325

high pressure limit control

Answer 326

low pressure limit control

Answer 327

flame safeguard control

Answer 328

low water cutoff

Answer 329

water heated for use in restaurant equipment

Answer 330

water in a water boiler return line

Answer 331

water from the relief valve in a boiler

Answer 332

water in a steam boiler return line

Answer 333

direct vent only

Answer 334

equipped with a regulator

Answer 335

equipped with a fan

Answer 336

equipped with an on / off switch on the wall

Answer 337

may pass through floors, ceilings or roofs provided a metal thimble is used

Answer 338

may pass through floors, ceilings or roofs provided the required minimum distance from combustible material is maintained

Answer 339

may pass through floors, ceilings or roofs provided they are insulated

Answer 340

shall not pass through floors, ceilings or roofs

Answer 341

1 foot (300 mm)

Answer 342

3 feet (900 mm)

Answer 343

6 feet (1800 mm)

Answer 344

10 feet (3 m)

Answer 345

22 B & SG (0.64 mm) aluminum

Answer 346

24 GSG (0.60 mm) galvanized steel

Answer 347

26 GSG (0.47 mm) galvanized steel

Answer 348

28 GSG (0.38 mm) galvanized steel

Answer 349

a draft hood will eliminate back drafts coming down the chimney

Answer 350

a draft hood will prevent a negative pressure inside the building

Answer 351

a draft hood will prevent a down draft from entering the appliance

Answer 352

a draft hood will prevent flue gases from entering a building

Answer 353

negative over fire draft

Answer 354

positive over fire draft

Answer 355

zero (neutral) over fire draft

Answer 356

variable over fire draft condition

Answer 357

the area of the common vent shall equal the total area of all the flue collars

Answer 358

the area of the common vent shall equal the area of the largest single flue collar

Answer 359

the area of the common vent shall equal the area of either the largest draft control device outlet or the largest flue outlet plus 50% of the sum of the outlet areas of the additional appliances

Answer 360

the area of the common vent shall equal the area of either the largest draft control device outlet or the largest flue outlet plus 75% of the sum of the outlet areas of the additional appliances

Answer 361

0 square inches

Answer 362

9 square inches

Answer 363

18 square inches

Answer 364

125 square inches

Answer 365

0 square inches

Answer 366

8 square inches

Answer 367

18 square inches

Answer 368

125 square inches

Answer 369

at the lowest possible point communicating with the outdoors

Answer 370

at the highest possible point communicating with the outdoors

Answer 371

on the same horizontal plane as the combustion air opening

Answer 372

at or above the level of the burner

Answer 373

located in a different room than the appliance it serves

Answer 374

located in the same room as the appliance it serves

Answer 375

installed on an appliance with an induced draft

Answer 376

sized to the existing vent connection

Answer 377

an updraft condition is present in the venting system of the appliance

Answer 378

there is excessive draft at the appliance

Answer 379

the venting system of the appliance is restricted

Answer 380

the appliance is under fired

Answer 381

100 square inches

Answer 382

200 square inches

Answer 383

900 square inches

Answer 384

1800 square inches

Answer 385

36 square inches (23000 mm2)

Answer 386

43 square inches (28000 mm2)

Answer 387

47 square inches (30000 mm2)

Answer 388

50 square inches (32000 mm2)

Answer 389

a velometer

Answer 390

an inclined manometer

Answer 391

an anemometer

Answer 392

a psychrometer

Answer 393

it ensures the fan motor is running

Answer 394

it ensures the fan is running

Answer 395

it ensures the draft is correct

Answer 396

it ensures there is no negative air

Answer 397

the humidifier solenoid valve opens

Answer 398

the humidifier motor starts to turn

Answer 399

the furnace fan starts, then the humidifier starts

Answer 400

the gas valve opens the humidifier starts

Answer 401

in parallel with the fan motor

Answer 402

in series with the fan motor

Answer 403

in parallel with the fan

Answer 404

in series with the fan

Answer 405

to ensure as much of the air is bypassed as is possible

Answer 406

to remove as many odours as possible

Answer 407

to ensure there is as much restriction to air flow as possible

Answer 408

to ensure an even distribution of air across the face of the filter

Answer 409

all the time the fan is running

Answer 410

only when the fan is on low speed

Answer 411

only when the fan is on high speed

Answer 412

only when the humidistat calls

Answer 413

20 – 30 volts

Answer 414

120 – 130 volts

Answer 415

220 – 240 volts

Answer 416

9,000 – 12,000 volts

Answer 417

120 – 24 volt

Answer 418

240 - 24 volt

Answer 419

240 – 120 volt

Answer 420

120 – 240 volt

Answer 421

specific heat

Answer 422

latent heat

Answer 423

sensible heat

Answer 424

hydrometer

Answer 425

potentiometer

Answer 426

voltage will decrease

Answer 427

voltage will increase

Answer 428

current will decrease

Answer 429

current will increase

Answer 430

voltage will decrease

Answer 431

voltage will increase

Answer 432

current will decrease

Answer 433

current will increase

Answer 434

in all ductwork

Answer 435

upstream of the blower

Answer 436

downstream of the blower

Answer 437

at the supply registers

Answer 438

heat transfer through solid objects

Answer 439

heat transfer through fluids

Answer 440

a wave form of heat transfer

Answer 441

a form of latent heat transfer

Answer 442

increases air flow

Answer 443

decreases air flow

Answer 444

increases current flow

Answer 445

decreases temperature rise

Answer 446

shuts the blower off on safety only

Answer 447

starts the blower when the plenum is up to temperature

Answer 448

starts and stops the blower

Answer 449

ensures the burner will not start if overheating occurs

Answer 450

2 – 3/4 in.

Answer 451

3 – 1/2 in.

Answer 452

Pressure drop

Answer 453

Conductor magnetic field

Answer 454

Load in parallel wires

Answer 455

Direct power across loads

Answer 456

20 to 30 mV

Answer 457

10 to 15 mV

Answer 458

10 mV or less

Answer 459

Orifice too small

Answer 460

Mid to high gas pressure

Answer 461

Target pilot orifice

Answer 462

Orifice size too large

Answer 463

Flame molecules

Answer 464

Proper grounding plane

Answer 465

Proper air to gas mixture to pilot

Answer 466

Flame rod insulator

Answer 467

Trial for ignition

Answer 468

Pilot flame

Answer 469

Intermittent pilot

Answer 470

Yes, if gas piping can support gas input

Answer 471

Yes, if pool heater is direct vented

Answer 472

Yes, if poll heater is close to chimney

Answer 473

Burner tray

Answer 474

Ribbon burner

Answer 475

Primary air fan assist burner

Answer 476

1 to 3 flue pass boiler

Answer 477

2 to 6 flue pass boiler

Answer 478

2 to 5 flue pass boiler

Answer 479

2 to 4 flue pass boiler

Answer 480

Yes, if proper air supply is added

Answer 481

Yes, if the venting is over sized

Answer 482

No, even if new venting is installed

Answer 483

Yes, only if its a bed sitting room

Answer 484

Pressure rise

Answer 485

Water level

Answer 486

Pressure differential

Answer 487

Steam system output

Answer 488

Low water cut off

Answer 489

Expansion tank

Answer 490

Flow switch

Answer 491

Category II

Answer 492

Category I

Answer 493

Category IV

Answer 494

Category III

Answer 495

Flame scanner

Answer 496

Flame roll out switch

Answer 497

Low water cut off

Answer 498

High limit steam lock out control

Answer 499

Wet bulb and atmospheric pressure

Answer 500

Dry bulb and latent heat of vapour

Answer 501

Moisture bulb and wet bulb

Answer 502

Wet bulb and dry bulb

Answer 503

Explosive gases

Answer 504

Neutralizers

Answer 505

Sensible heat

Answer 506

Radiant heat

Answer 507

Latent heat

Answer 508

Super heat

Answer 509

Restricting element

Answer 510

Loading element

Answer 511

Measuring element

Answer 512

38,210 Btu/h

Answer 513

36,220 Btu/h

Answer 514

33,150 Btu/h

Answer 515

34,120 Btu/h

Answer 516

258 MBtu/h

Answer 517

286 MBtu/h

Answer 518

268 MBtu/h

Answer 519

284 MBtu/h

Answer 520

Inlet pressure

Answer 521

Downstream pressure

Answer 522

Locks out gas flow

Answer 523

350 Psig to 10 Psig

Answer 524

375 Psig to 5 Psig

Answer 525

250 Psig to 10 Psig

Answer 526

375 Psig to 10 Psig

Answer 527

Restricting element

Answer 528

Measuring element

Answer 529

Loading element

Answer 530

Spring element

Answer 531

Rotary type

Answer 532

Tubing type

Answer 533

Bellows type

Answer 534

Down stream displacement meter

Answer 535

Up stream displacement meter

Answer 536

Pressure displacement meter

Answer 537

Positive displacement meter

Answer 538

Designed for better combustion

Answer 539

Designed for conversion boiler

Answer 540

Designed to overcome appliance friction

Answer 541

Designed to overcome burner resistance

Answer 542

Pound to 11 in. w.c.

Answer 543

Ounces to 7 in. w.c.

Answer 544

Ounces to 11 in. w.c.

Answer 545

Pound to 7 in. w.c.

Answer 546

Low water cut off

Answer 547

Pressure switch

Answer 548

Flow switch

Answer 549

Restricting element

Answer 550

Loading element

Answer 551

Limiting orifice

Answer 552

Measuring element

Answer 553

Improper combustion air mixture

Answer 554

Excessive elbows in venting system

Answer 555

Cracked heat exchanger

Answer 556

Blocked condensate furnace drain

Answer 557

Flue gases are hotter and rise faster through chimney

Answer 558

Flue CO2 gases are more efficient

Answer 559

Flue CO2 gases changes to N2

Answer 560

Flue CO2 gases changes to CO

Answer 561

8 ft. if range is in the center of the kitchen

Answer 562

Hot water boiler

Answer 563

Steam water boiler

Answer 564

Domestic hot water storage tank

Answer 565

Domestic potable hot water tank

Answer 566

Klixon limit

Answer 567

Bi-metal switch

Answer 568

Relay timer

Answer 569

Temperature

Answer 570

1 cubic foot

Answer 571

10 cubic feet

Answer 572

20 cubic feet

Answer 573

24 cubic feet

Answer 574

Excess Air

Answer 575

Ventilation Air

Answer 576

Spill switch and Low water cut off

Answer 577

Low water cut off and hi limit

Answer 578

Flow sensor and hi limit

Answer 579

Spill switch and hi limit

Answer 580

CO2 monitor alarm

Answer 581

CO monitor alarm

Answer 582

O2 monitor alarm

Answer 583

CO and O2 monitor alarm

Answer 584

Primary air mixture

Answer 585

Ignition of entire burner

Answer 586

Blue flame

Answer 587

Secondary air

Answer 588

Air flow though the appliance

Answer 589

Negative building pressure

Answer 590

Warm air will rise

Answer 591

External building envelope

Answer 592

Low gas input

Answer 593

Mixing valve

Answer 594

Broken dip tube

Answer 595

1 gpm per 2,000 Btu

Answer 596

3 gpm per 20,000 Btu

Answer 597

1 gpm per 1,000 Btu

Answer 598

1 gpm per 10,000 Btu

Answer 599

1/4 to 3/8 in.

Answer 600

3/8 to 1/2 in.

Answer 601

1/16 to 3/16 in.

Answer 602

1/8 to 3/16 in

Answer 603

10 seconds

Answer 604

0.8 seconds

Answer 605

0.8 seconds

Answer 606

10 seconds

Answer 607

90 seconds

Answer 608

Shuts the burner down if loss of gas supply

Answer 609

Determines the length of the burner "on" cycle

Answer 610

Acts as a back up safety limit

Answer 611

Shuts down burner on excess flow

Answer 612

Only if the lamp is direct spark

Answer 613

Yes if it is 14 AWG wire

Answer 614

5.1 cu ft.

Answer 615

8.5 cu ft.

Answer 616

Remove flue gas

Answer 617

Speed up combustion

Answer 618

Slow flue gas

Answer 619

Raises flue temperature

Answer 620

50 seconds

Answer 621

1 minute, 24 seconds

Answer 622

1 minute, 10 seconds

Answer 623

Methane and Butane

Answer 624

Methane and Ethane

Answer 625

Ethane and Butane

Answer 626

Butane and Propane

Answer 627

Manufacturer approved only

Answer 628

Only if vents are silicone together

	Erstellt von toan nguyen vor mehr als 4 Jahre

Nächster

G2 EXAM part 1

Beschreibung

Zusammenfassung der Ressource

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