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Question 11 out of 1 points

The movement of heat from a hot surface to a cold surface is called...

Answers: A.

Convection

B.

Conduction

C.

Induction

D.

Radiation

Question 21 out of 1 points

As air is heated it will:

Answers: A.

rise and be replaced by cooler air

B.

et heavier

C.

stay the same

D.

fall and be replaced by cooler air

Question 31 out of 1 points

!ow is heat transferred from a baseboard heater"

Answers: A.

Convection

B.

Conduction

C.

Induction

D.

Radiation

Question 41 out of 1 points

There are four factors a#ectin human comfort$ which is not a factor"

Answers: A.

!umidity

B.

Temperature

C.

Radiation

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D.

Air %ovement

&.

'ocation

Question 51 out of 1 points

!eat is transfered by the sun throuh radiation. This statement is T() *****.

Answers: True

)alse

Question 61 out of 1 points

+eople may feel cold even if the temperature is ,- derees centiradebut the humidity is low.The above statement is:

Answers: A.

)alse.B.

True if the humidity is above - percent

C.

True if the humidity is below /- percent.

D.

True if there is insu0cient air movement over the body.

Question 81 out of 1 points

A thermostat is basically a temperatureactivated sensor that providesfeedbac2 to the system.The above statement is 3T()4 *****

Answers: True

)alse

Question 91 out of 1 points

5hich of the followin are basic components of a forced air heatinsystem"

Answers: A.

fan

B.

ducts

C.

heat e6chaner

D.

all of the above

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&.

only a 7 b

Question 101 out of 1 points

An e6ample of a control device would be a:

Answers: A.relay

B.thermocouple

C.thermostat

D.as valve

Question 111 out of 1 points

A safety shutdown circuit consistin of a hih limit switch$ a safetyswitch and a as valve would have the switches hoo2ed up:

Answers: A.

parallel

B.

series

C.

series(parallel

D.

accross the as valve

Question 12- out of 1 points

In a 8closed loop8 control system for a domestic furnace$ thethermostat would be in series with:

Answers: A.

the as valveB.

the hih limit switch

C.

the coolin anticipator

D.

all of the above

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Question 131 out of 1 points

9afety controllin devices are intended to detect danerous orhaardous conditions in a heatin system.This statement is T()**********.

Answers: True

)alse Question 14

1 out of 1 points

A as valve in a residential furnace is eneraly ,/ volt and 2nown as a************* device and is eneried when the thermostat closes$puttin power to the valve.

Answers: A.

9witch

B.

Brea2er

C.

'oad

D.

operator

Question 151 out of 1 points

In terms of an electric circuit$ a thermostat is:

Answers: A.a source of potential di#erence

B.a switch

C.a load device

D.a enery consumin device which raises or lowers room temperature

Question 16

1 out of 1 points

5hat construction techni;ues have been implemented that ma2e itnecessary to add fresh air to a dwellin"

Answers: A.

%oist 'umber

B.

+aint fumes

C.

Air tiht construction

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D.

Coo2in in the home

Question 171 out of 1 points

9tate the code rule for the distance a switch must be from a as meter.

Rule number***********.

Question 181 out of 1 points

A class , 'ow

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Answers: A.

everythin is normal

B.

the as valve is faulty

C.

the hih limit switch or thermostat is open

D.

the hih limit switch and thermostat are closed

Part two

Question 11 out of 1 points

The thermopile acts as the power supply for the controls on amillivolt system.The above statement is 3T()4 *****

Answers: True

)alse

Question 21 out of 1 points

In a domestic as furnace$ the fan should stop:

Answers:

A.

as soon as the room thermostat opens

B.

as soon as main burner as valve closes.

C.

both A and B.

D.

when the heat e6chaner and the air in the plenumhas cooled down.

Question 31 out of 1 points

@f the followin types of temperature sensin devices$ which ismost commonly used in room thermostats"

Answers: A.

'i;uid bulbB.

Rod and Tube

C.

Bimetal

D.

Bellows

Question 41 out of 1 points

The voltae output of a thermopile is:

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