QUESTION 1
- True or False? The earlier terminals units in a two-pipe direct return hot water heating system tend to
overheat without valve control.
True
False
1 points
QUESTION 2 - True or False? Evaporative Cooling does not occur at Dew Point Temperature.
True
False
1 points
QUESTION 3 - For the first 12 hours of a day the average exterior temperature is 54F. The average temperature rises to 68F for the balance of the day. How many degree days are there?
1 points
QUESTION 4 - Name two (2) methods of responding to a load reduction in a hot water heating system
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1 points
QUESTION 5 - What is the purpose of a Trap in a Steam Heating System . (two purposes required)
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1 points
QUESTION 6
1.
An exterior wall is made up of 4″ of Precast Concrete of Conductivity (K) 1.0 BTU/ in. Hr. sf ºF, a 2″ Air Space
of Resistance (R) 1.13, Concrete Block of Transmittance (U) 0.901 BTU/ Hr. sf. ºF, 2″ of Insulation of
Resistance (R) 15.0 and 1/2” of Gwb of Resistance (R) 0.32. The Resistance (R) of the Outside Air Film is 0.17
and the Resistance (R) of the Inside Air Film is 0.68. Area of the wall is1,000 SF.
The outside Temperature is 32ºF.
The inside Temperature is 72ºF and inside Relative Humidity is 30%.
What is the Dew Point Temperature of the air?
approximately 36 to 38
approximately 30 to 35
approximately 40 to 43
not enough information to answer
1 points
QUESTION 7 - Where in the piping of a Heating System are the following are traps placed?
in the piping of a Heating System traps are placed before (on the supply side) the Terminal Unit.
in the piping of a Heating System traps are placed after (on the return side) the Terminal Unit.
1 points
QUESTION 8 - The Resistance (R) of an enclosure of surface area of 5,000sf is 20. What is the amount of heat required to
heat the enclosure annually if the annual degree days is 2,000? (in BTU)
12,000,000
1,200,000
500,000
120,000,000
1 points
QUESTION 9 - Name the three (3) basic elements of a Hot Water (Hydronic) Heating System.
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1 points
QUESTION 10 - The street main provides 86.6 psi of water pressure. There is 18.3 psi of pressure loss due to friction in the
piping and the water meter. How high can we place a faucet above the street main if the required minimum
fixture pressure is 25 psi?
100 ft
1,000 ft
10,000ft
10 ft
1 points
QUESTION 11 - An exterior wall is made up of 4″ of Precast Concrete of Conductivity (K) 1.0 BTU/ in. Hr. sf ºF, a 2″ Air
Space of Resistance (R) 1.13, Concrete Block of Transmittance (U) 0.901 BTU/ Hr. sf. ºF, 2″ of Insulation of
Resistance (R) 15.0 and 1/2” of Gwb of Resistance (R) 0.32. The Resistance (R) of the Outside Air Film is 0.17
and the Resistance (R) of the Inside Air Film is 0.68. Area of the wall is1,000 SF.
The outside Temperature is 32ºF.
The inside Temperature is 72ºF and inside Relative Humidity is 30%.
What is the Total Conductance (C) of the wall?
.045
.45
4.5
22.41
1 points
QUESTION 12 - What is the effect of exterior winds on Infiltration through an exterior wall?
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1 points
QUESTION 13 - True or False? As the thickness decreases, the transmittance, U, of a material increases.
True
False
1 points
QUESTION 14 - True or False? Heating (terminal) units are placed under windows to allow for cold air drafts.
True
False
1 points
QUESTION 15 - An exterior wall is made up of 4″ of Precast Concrete of Conductivity (K) 1.0 BTU/ in. Hr. sf ºF, a 2″ Air
Space of Resistance (R) 1.13, Concrete Block of Transmittance (U) 0.901 BTU/ Hr. sf. ºF, 2″ of Insulation of
Resistance (R) 15.0 and 1/2” of Gwb of Resistance (R) 0.32. The Resistance (R) of the Outside Air Film is 0.17
and the Resistance (R) of the Inside Air Film is 0.68. Area of the wall is1,000 SF.
The outside Temperature is 32ºF.
The inside Temperature is 72ºF and inside Relative Humidity is 30%.
What is the Temperature drop in ºF across the insulation? The temperature at the interior side (warm side) – the
temperature at the exterior (cold side) =?
41.46
22.41
72
40
1 points
QUESTION 16 - What is the Latent Heat of Condensation?
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1 points
QUESTION 17
- When is wet bulb temperature equal to dry bulb temperature?
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1 points
QUESTION 18 - Name four (4) factors (values) displayed on a Psychrometric Chart?
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1 points
QUESTION 19 - Name four (4) factors that affect the amount of radiation received by a surface A from another surface (or
source) B?
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1 points
QUESTION 20 - In a septic tank, why is the effluent to a sand filter dropped through the air?
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1 points
QUESTION 21 - in the piping of a Heating System where are valves placed with respect to the Terminal Unit.
in the piping of a Heating System valves are placed before (on the supply side) of he Terminal Unit.
in the piping of a Heating System valves are placed after (on the return side) of the Terminal Unit.
1 points
QUESTION 22 - Name four (4) methods of pressurization of a hot water heating system
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1 points
QUESTION 23 - Name three (3) disadvantages of a Series Loop Hot Water Heating System?
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1 points
QUESTION 24 - Name the three (3) basic elements of a Steam Heating System.
QUESTION 25 - An exterior wall is made up of 4″ of Precast Concrete of Conductivity (K) 1.0 BTU/ in. Hr. sf ºF, a 2″ Air
Space of Resistance (R) 1.13, Concrete Block of Transmittance (U) 0.901 BTU/ Hr. sf. ºF, 2″ of Insulation of
Resistance (R) 15.0 and 1/2” of Gwb of Resistance (R) 0.32. The Resistance (R) of the Outside Air Film is 0.17
and the Resistance (R) of the Inside Air Film is 0.68. Area of the wall is1,000 SF.
The outside Temperature is 32ºF.
The inside Temperature is 72ºF and inside Relative Humidity is 30%.
In which layer of the wall does condensation take place?
As air moves through the wall and the moisture in it condensates, the condensate moves to the next surface in
the direction of air movement. the surface on which the condensate is deposited is called the condensing
surface. therefore, condensate takes place on the outer surface of the concrete.
As air moves through the wall and the moisture in it condensates, the condensate moves to the next surface in
the direction of air movement. the surface on which the condensate is deposited is called the condensing
surface. therefore, condensate takes place on the inner surface of the concrete.
As air moves through the wall and the moisture in it condensates, the condensate moves to the next surface in
the direction of air movement. the surface on which the condensate is deposited is called the condensing
surface. therefore, condensate takes place on the outer surface of the Concrete Block
As air moves through the wall and the moisture in it condensates, the condensate moves to the next surface in
the direction of air movement. the surface on which the condensate is deposited is called the condensing
surface. therefore, condensate takes place on the inner surface of the concrete.
1 points
QUESTION 26 - What is the essential difference between Absolute and Relative Humidities?
1 points
QUESTION 27 - True or False? The unit for rate of water flow is feet per minute.
True
False
1 points
QUESTION 28 - Name two (2) types of steel boilers?
1 points
QUESTION 29 - An exterior wall is made up of 4″ of Precast Concrete of Conductivity (K) 1.0 BTU/ in. Hr. sf ºF, a 2″ Air
Space of Resistance (R) 1.13, Concrete Block of Transmittance (U) 0.901 BTU/ Hr. sf. ºF, 2″ of Insulation of
Resistance (R) 15.0 and 1/2” of Gwb of Resistance (R) 0.32. The Resistance (R) of the Outside Air Film is 0.17
and the Resistance (R) of the Inside Air Film is 0.68. Area of the wall is1,000 SF.
The outside Temperature is 32ºF.
The inside Temperature is 72ºF and inside Relative Humidity is 30%.
What is the rate of heat loss (Q) across the wall?
1800
180
18,000
45
1 points
QUESTION 30 - True or False? Both traps and valves are used on hot water heating systems.
True
False