Worksheets2018 State Test Simulation Version 1
Total questions: 100
Worksheet time: 3hrs 20mins
Name
Class
Date
1.
Sauna heaters shall be installed according to the manufacturer's instruction, and must be equipped with a thermostat which will limit room temperature to what degrees F?
a)
194
b)
175
c)
162
d)
128
e)
IFGC 615.6
2.
The pressure to temperature relationship of a refrigerant under saturated conditions requires a table E.5 (pg. 1555) to determine. Whereby, a saturated condition means holding as much vapor as refrigerant is able. If R-410A is used at 40 degrees F saturation, what would be the liquid pressure?
a)
105
b)
118
c)
127
d)
139
e)
MR 9.4.3
3.
In the ___, the liquid refrigerant is now under much reduced pressure. It will evaporate or boil very rapidly. This, in turn, cools the ___. The compressor creates a low pressure drawing the vapor from the ___. Then it compresses the vapor back into the high side. What is this component called?
a)
condenser
b)
refrigerant receiver
c)
cylinder of refrigerant
d)
evaporator
e)
MR 6.6.1
4.
Select the number of psi, without going over the limit, an acetylene manifold pressures must be at.
a)
5 psi
b)
20 psi
c)
15 psi
d)
10 psi
e)
GK
5.
Return air openings for heating, ventilation and air-conditioning systems shall not be taken from a closet, bathroom, toilet room, kitchen, garage, boiler room, furnace room or unconditioned attic, however, a ___ is not prohibited.
a)
boiler room
b)
furnace room
c)
unconditioned attic
d)
bedroom
e)
IMC 601.5 (7)
6.
Apply the "cfm" formula to solve the following: A duct measures 40 inches by 22 inches and the air velocity is 1,500 fpm.
a)
9,167 cfm
b)
8,910 cfm
c)
5,675 cfm
d)
3,115 cfm
e)
MR 27.4.2
7.
Using the Psychrometric Chart found in Modern Refrigeration and Air Conditioning, what would be the approximate dry bulb temperature in degrees F, given a humidity ratio of 79 grains / # dry air, and a wet bulb temperature of 68 degrees F?
a)
50 degrees F
b)
60 degrees F
c)
70 degrees F
d)
80 degrees F
e)
MR Figure 27-18
8.
What would be the approximate Dry Bulb temperature of a system, given a wet bulb temperature of 65 degrees F, and a relative humidity of 60%?
a)
65 degrees
b)
70 degrees
c)
75 degrees
d)
80 degrees
e)
MR Figure 27-18
9.
A steel piping in a hydronic system needs to be installed. Indicate the Maximum vertical spacing in accordance with MSS.
a)
18 feet.
b)
15 feet.
c)
12 feet.
d)
9 feet.
e)
IMC Table 305.4
10.
If the velocity of the air in a 12" X 12" duct is 2,000 fpm, what is the cfm being delivered?
a)
3,000 cfm.
b)
4,000 cfm.
c)
2,000 cfm.
d)
1,000 cfm.
e)
MR 29.5
11.
Specifications indicate that a 3-inch steel gas will have approximately ___ threads to be cut.
a)
12 threads
b)
8 threads
c)
14 threads
d)
10 threads
e)
IFGC Table 403.9.2
12.
When working with tubing in fuel gas system, what is the maximum distance allowed between supports for horizontal 1/2 inch O.D.?
a)
10 feet.
b)
8 feet.
c)
6 feet.
d)
4 feet.
e)
IFGC Table 415.1
13.
A contractor must build a 15,000 square foot educational auditorium. What would be the minimum outdoor ventilation in CFM?
a)
1,200 cfm
b)
900 cfm
c)
750 cfm
d)
624 cfm
e)
IMC Table 403.3.1.1
14.
Passageways around all sides of boilers shall have an unobstructed with of NOT LESS than __ inches.
a)
30 inches
b)
36 inches
c)
18 inches
d)
24 inches
e)
IMC 1004.3
15.
Solve the following: A public bathroom with one water closet and one lavatory with a floor area of 35 square feet. Minimum ventilation rate would be?
a)
80 cfm.
b)
75 cfm.
c)
50 cfm.
d)
35 cfm.
e)
IMC Table 403.3.2.3
16.
To cool down 20 pounds of water from 85 degrees F to 45, how much heat must be removed?
a)
1,600 Btu.
b)
1,500 Btu.
c)
1,200 Btu.
d)
800 Btu.
e)
MR 4.6.2
17.
When a re-inspection is to determine maintenance compliance requirements of a mechanical system, it shall be performed according to
a)
ASHRAE/ACCA/ANSI Standard 15.
b)
ASHRAE/ACCA/ANSI Standard 170.
c)
ASHRAE/ACCA/ANSI Standard 180.
d)
ASHRAE/ACCA/ANSI Standard 183
e)
IMC 102.3
18.
A nominal pipe size of 6-inch gas pipe needs to be purged with inert gas prior to servicing. What is the length of piping requiring purging?
a)
greater than 10 feet.
b)
greater than 15 feet.
c)
greater than 20 feet.
d)
greater than 30 feet.
e)
IFGC Table 406.7.1
19.
According to Ohm's Law, the correct units for electrical current are
a)
Ohms.
b)
Watts.
c)
Volts.
d)
Amperes.
e)
MR 12.1.3
20.
Using the duct size calculator provided, and based on the effect of compression of the flexible duct on the air flow efficiency, what would be the approximate CFM air quantity given the following varables? -10 inch flexible duct, -15% compression, -700 FPM velocity.
a)
220
b)
300
c)
450
d)
670
e)
ADI Duct Calculator
21.
Ducts shall NOT be constructed of ___.
a)
fiberglass
b)
sheet metal
c)
PVC
d)
asbestos
e)
GK
22.
According to the International Mechanical Code, mechanical joints in refrigerant piping made of annealed temper copper tube shall NOT exceed outside diameter greater than
a)
3/4 inch
b)
7/8 inch
c)
1 1/8 inch
d)
2 inches
e)
IMC 1107.5.3
23.
An HVAC technician must NOT use ___ to pressurize appliances (in a refrigeration system) to check for leaks, because when mixed with compressor oil, an explosion may occur.
a)
nitrogen
b)
carbon dioxide
c)
oxygen
d)
carbon monoxide
e)
IMC 1108.1
24.
Scheduled or maintenance of a refrigeration system may require welding or brazing, what would be the largest concern with respect providing sufficient ventilation?
a)
the reduction of oxygen would make it hard to breath
b)
heat generated could injure personnel
c)
flourocarbons may become toxic
d)
carbon monoxide may form
e)
GK
25.
A steel piping in a hydronic system needs to be installed. Indicate the MAXIMUM vertical spacing in accordance with MSS.
a)
18 feet
b)
15 feet
c)
12 feet
d)
9 feet
e)
IMC Table 305.4
26.
Joints and all refrigerant-containing parts shall be constructed to withstand, without leakage, a pressure of ___ percent of the higher of the design pressure or pressure relief device setting.
a)
1.5
b)
1.25
c)
1
d)
0.8
e)
IMC 1107.6
27.
A refrigeration system located inside a building and equipped with a pressure relief device must discharge how many feet above the adjoining grade level?
a)
10
b)
12
c)
15
d)
18
e)
IMC 1105.7
28.
How many CFM of ventilation air is required for a 50,000 Btu/hr infrared heater?
a)
100
b)
200
c)
300
d)
400
e)
IFGC 630.3
29.
A worker has to install steel gas pipe of nominal size of 2-inch horizontally. This job is being done at a commercial building. Indicate how far apart the horizontal supports must appear.
a)
6 feet
b)
4 feet
c)
10 feet
d)
8 feet
e)
IFGC Table 415.1
30.
Using the duct size calculator provided, what would be the approximate Air Quantity in CFM given the following varables? -14 by 14 inch rectangular duct -1000 FPM velocity
a)
1000
b)
1200
c)
1300
d)
1400
e)
ADI Duct Calculator
31.
According to OSHA regulations, before connecting a regulator to a fuel gas cylinder valve, what must take place?
a)
Crank the seal with a metal rod.
b)
Tap the regulator with wrench to loosen any dust or dirt on it.
c)
Open the valve quickly until a cracking sound is heard.
d)
Open the valve slightly and close it immediately.
e)
OSHA 1926 350 (d) (i)
32.
Where a closet is designed for the installation of a clothes dryer, an opening having an area of not less than ___ for makeup air shall be provided in the closet enclosure.
a)
40 square inches
b)
65 square inches
c)
80 square inches
d)
100 square inches
e)
IFGC 614.5
33.
According to OSHA, fall prevention systems for vertical lifelines safe points of anchorage are:
a)
something heavy on the ground such as a truck.
b)
structural members of buildings.
c)
standpipes or other mounted piping systems.
d)
pipe hangers.
e)
OSHA 1926 104 (b)
34.
The minimum dimension of a horizontal duct that is used to introduce combustion air into a confined space must NOT be less than
a)
1 inch
b)
2 inches
c)
3 inches
d)
5 inches
e)
IFGC 304.7.3
35.
In minor repairs of mechanical equipment, defective parts shall be replaced or repaired such that they will ___.
a)
allow the equipment to be resold
b)
preserve the original approval or the listing
c)
preserve the efficiency of the equipment
d)
allow the equipment to operate like new
e)
IMC 301.14
36.
During calculating energy loads, the ETD measures ___.
a)
air infiltration.
b)
mixed air temperature.
c)
the effect of the sun.
d)
heat loss through masonry walls.
e)
Manual J 45122
37.
The required volume in cubic feet of indoor combustion air using the standard method for an 80% AFUE 100,000 Btu/hr gas furnace is
a)
2000
b)
4000
c)
5000
d)
6000
e)
IFGC 304.5.1
38.
Specifications indicate that a 3-inch steel gas line will have approximately ___ threads to be cut.
a)
12 threads
b)
8 threads
c)
14 threads
d)
10 threads
e)
IFGC Table 403.9.2
39.
A mechanical permit is required for all of the following, except ___.
a)
a condensing unit
b)
an air-handeling unit
c)
an enclosed furnace
d)
a portable cooling unit
e)
IMC 106.2
40.
Mechanical joints, in a refrigeration system, shall not be used on annealed temper copper tube in sizes larger than ___ OD size.
a)
7/8 inch OD
b)
1 1/8 inches OD
c)
5/8 inch OD
d)
3/4 inch OD
e)
IMC 1107.5.3
41.
When louver and grill design and free area are NOT known, what design should be used for combustion openings?
a)
All louvers must have a 50% free area.
b)
All louvers must be in a fixed open position.
c)
Metal louvers will have a 25% free area and wood louvers will have a 75% free area.
d)
Wood louvers will have a 25% free opening and metal louvers will have a 75% free opening.
e)
IFGC 304.1
42.
Attics containing appliances shall be provided with an access point passageway large enough to allow removal of the largest appliance. This passageway shall not be less than ___ in length from the opening to the appliance.
a)
24 feet
b)
22 feet
c)
20 feet
d)
18 feet
e)
IMC 306.3
43.
Find the MINIMUM size chimney required: A fan assisted Category 1 appliance with an input rating of 55,000 BTtu/h is to be vented with a single wall connector into a masonry chimney that is 20 feet high with a 10 foot lateral.
a)
it is not recommended that this appliance be connected to this chimney
b)
4 inches
c)
5 inches
d)
3 inches
e)
IFGC 503.10.3
44.
Standard installation practice calls for an HVACR appliance located on a roof top to be securely fastened on a:
a)
pressure treated lumber
b)
metal supporting structure
c)
concrete slab and anchors
d)
level plat form
e)
GK
45.
The International Mechanical Code considers a "flammable vapor" to be concentration of flammable constituents in the air which exceeds ___ percent of its flammability limit.
a)
10
b)
15
c)
25
d)
30
e)
IMC 510.2
46.
Given the scenario: Winter design temperatures equals to 25 degrees F, indoor temperature is 75 degrees F, and air volume equals to 25 cfm. Heat loss due to infiltration is?
a)
1,575 Btu/h
b)
1,475 Btu/h
c)
1,375 Btu/h
d)
1,275 Btu/h
e)
Manual J 7-20, 7-13 & Table 5
47.
A technician is installing an electrical-powered appliance. A guardrail will be installed later on. International Mechanical Code must be implemented. The roof is 8 ft. above the grade be;ow. What would be the LEAST distance between the appliance and the roof edge?
a)
8 feet
b)
10 feet
c)
6 feet
d)
4 feet
e)
IMC 304.11
48.
Work which is exempt from mechanical permit requirements ___.
a)
shall be insprcted
b)
is required to comply with the mechanical code
c)
shall be performed in compliance with an applicable national standard
d)
shall be performed in accordance with generally accepted local practices
e)
IMC 106.1
49.
Solve for sheet steel thickness: high heat metal chimney with 18 inches diameter.
a)
10 GA.
b)
12 GA.
c)
14 GA.
d)
16 GA.
e)
IMC Table 803.9 (2)
50.
Choose the type of fittings NOT ALLOWED when dealing with steel gas piping.
a)
bushings.
b)
flange.
c)
couplings
d)
unions
e)
IFGC 403.10.4
51.
Condensate from all cooling coils and evaporators shall be conveyed from the drain pan outlet to an approved place of disposal. Such piping shall maintain a minimum horizontal slope in the direction of discharge of NOT LESS than ___ unit vertical in 12 units horizontal.
a)
1/4 inch
b)
3/8 inch
c)
1/8 inch
d)
1/10 inch
e)
IMC 307.2.1
52.
Solve for normal ventilation: 3 persons occupy a machinery room containing refrigerant. This room is 400 square foot. Normal ventilation requirement is:
a)
120 cfm
b)
60 cfm
c)
260 cfm
d)
200 cfm
e)
IMC 1105.6.3.1
53.
According to the OSHA safety and health regulation for construction, a fatal accident that results in a death must be reported no later than ___.
a)
1 hour
b)
4 hours
c)
8 hours
d)
24 hours
e)
OSHA 1904.39 (a)
54.
Give details on how a natural gas piping tracer must be installed. It must:
a)
have the radius of bends not less than 20 times the inside diameter.
b)
have the pipe joints threaded and screwed together
c)
include a minimum 18 AWG insulated copper tracer
d)
be laid on a bed of pea gravel
e)
IFGC 404.17.3
55.
An 80,000 Btu/h Category 1 gas furnace will have the combustion air provided mechanically from the outside. How many CFM is required?
a)
25
b)
28
c)
30
d)
35
e)
IFGC 304.9
56.
A technician is fixing a leak on a silver soldered joint in a refrigerant pipe. He must do what?
a)
light oil the ends of the tubing inside and out.
b)
debur the ends of the tubing.
c)
apply flux to the outside of the tubing.
d)
clean the inside of the fittings with emery cloth.
e)
MR 11.3.2
57.
What will be the result ia a thermostatic expansion valve is oversized for a system?
a)
The evaporator will frost.
b)
The evaporator will have a colder temperature.
c)
The evaporator will have a warmer temperature.
d)
The evaporator will alternately be overfed and starved.
e)
MR 20.4
58.
The diameter of a belt riding on a pulley is measured at the
a)
inside of a belt.
b)
center of the belt.
c)
outside of the belt.
d)
outside of the pulley.
e)
MR 17.5.3
59.
A technician needs to replace refrigerant R-502 in a system. The refrigerant SHOULD NOT be replaced with ___.
a)
R-22.
b)
R-507A.
c)
R-407A.
d)
R-407B.
e)
MR 9.3.3
60.
In a ___ refrigerant system, two or more refrigerating systems are connected. In this type of system, both the evaporator and the condenser, operate at the same time.
a)
supercool system
b)
recoil system
c)
cascade system
d)
multiflow system
e)
MR Glossary
61.
Calculate what the current draw would be given that a circuit is operating on a source voltage of 120 VAC, and has a single resistive load of 24 Ohms?
a)
120
b)
10
c)
5
d)
0.5
e)
MR 12.1.3
62.
Which of the following refrigerants will have the MOST static loss of pressure across a liquid line with a 30-foot vertical line?
a)
R-22
b)
R-134a
c)
R-404A
d)
R-507
e)
MR 51.3.5
63.
The approximate heat content of natural gas is
a)
950 to 1,150 Btu/ft3.
b)
1,225 to 1.650 Btu/ft3.
c)
2,500 to 3,200 Btu/ft3.
d)
3,500 to 3,800 Btu/ft3.
e)
MR 41.2.3
64.
Troubleshoot the following conditions: The ohmmeter when across the start capacitor goes to low range, then slowly moves to the high range of the scale.
a)
indicates a short
b)
indicates an open
c)
good start capacitor
d)
bad motor winding
e)
MR 17.2.1
65.
According to Ohm's Law, to solve the current draw of a circuit, the correct formula would be which of the following?
a)
I=E/R
b)
E=I/R
c)
R=1/E
d)
I=R/E
e)
MR 12.1.3
66.
Combustion is a chemical process of rapid oxidation in which fuel and oxygen produce
a)
energy.
b)
water vapor.
c)
carbon dioxide.
d)
heat and light
e)
MR 41.2
67.
How much heat is required to melt a 20 pound block of ice that is sitting frozen at 4 degrees F, given that the heating temperature is 45 degrees F?
a)
1,130 Btu/h
b)
2,640 Btu/h
c)
3,420 Btu/h
d)
4,650 Btu/h
e)
MR 4.6.2
68.
What size tap drill should be used for a 12-13 tap?
a)
25/64 inches
b)
27/64 inches
c)
29/64 inches
d)
31/64 inches
e)
MR 7.1.6
69.
Compressors of oil control systems must be kept lubricated, but the oil must be prevented from moving through the system. What is not an oil control device?
a)
regulator device
b)
sight glass
c)
separator
d)
reservoir
e)
MR 19.3
70.
Slowing the velocity of water through an evaporator will have what effect on the evaporator?
a)
increase
b)
decrease
c)
no change
d)
slightly improve
e)
MR Figure 51-10
71.
What would be the calculated resistance of a circuit's load, given that the load draws a total current of 20 amperes, and the circuit source operating voltage is 240 VAC?
a)
3
b)
6
c)
12
d)
24
e)
MR 12.1.3
72.
Indicate the correct answer when dealing with a two-pipe hydronic system:
a)
each pipe circuit is the same length in a reverse return system.
b)
a direct return system is easier to balance.
c)
each circuit is a different design in a reverse return system.
d)
less piping is required for a reverse return system.
e)
MR 39.2.3
73.
Increasing the superheat tends to ___ the evaporator.
a)
disable
b)
flood
c)
starve
d)
cool
e)
MR 20.4.1
74.
What condition does the automatic expansion valve maintain?
a)
constant pressure in the low side
b)
constant pressure in the condenser
c)
constant pressure in the high side
d)
constant temperature in the evaporator
e)
MR 20.5
75.
What is the effect on the evaporator when the superheat of a system raises?
a)
flood.
b)
charge.
c)
heat.
d)
starve.
e)
MR 20.4.1
76.
Which of the following can help reduce infiltration?
a)
tint windows
b)
increase roof overhang
c)
inside positive pressure
d)
increase thermal conductivity insulation
e)
MR 29.3.1
77.
What is the applied voltage across an electric heater with a total current draw of 22 amperes and a resistance of 11 ohms?
a)
230
b)
240
c)
242
d)
248
e)
MR 12.1.3
78.
In a refrigeration system, superheat does NOT normally occur in the
a)
suction line
b)
liquid line accumulator
c)
compressor
d)
top part of the condenser
e)
MR 50.2.1
79.
Liquid receivers for a commercial system should be selected to be what percent larger than the total volume of liquid in the system?
a)
0.1
b)
0.12
c)
0.15
d)
0.25
e)
MR 51.1.4
80.
The passing of outside air into a building or cabinet through doors, cracks around windows, and other openings are examples of
a)
radiation
b)
ventilation
c)
transmission
d)
infiltration
e)
MR 28.5
81.
The typical water vapor saturation curve for air shows the effect of temperature and the amount of moisture that air will hold. If the air temperature raises from 55 to 75 degrees F, what will happen to the amount of moisture in the air?
a)
almost double.
b)
decrease about 20%.
c)
remain about the same.
d)
increase about 20%
e)
MR 35.1
82.
Carbon monoxide is a colorless, odorless, and poisonous gas that is produced when carbon fuels are
a)
under firing of the gas burners.
b)
fresh air is blown into the vent stack.
c)
incomplete combustion of fuel.
d)
extinguished with an excess of fresh air.
e)
MR Glossary
83.
Which of the following motors has the highest torque?
a)
three phase
b)
shaded-pole
c)
permanent-split capacitor
d)
capacitor start induction run
e)
MR 15.2.2
84.
The minimum working space along the firebox-opening side of a warm-air furnace is ___ inches in depth.
a)
6
b)
12
c)
18
d)
30
e)
IMC 306.3
85.
A technician is working on an exterior wall doing some notching. This wall is of nominal 2" x 6" wood stud. This means this wall must be notched every ___.
a)
2 inches
b)
3/4 inch
c)
1 inch
d)
1-3/8 inch
e)
IMC 302.3.2
86.
According to OSHA, employees must not perform work on scaffolding if it is:
a)
during a storm or high winds
b)
during extremely cold weather
c)
three times higher than the least base dimension
d)
five times higher than the least base dimension
e)
OSHA 1926 - 451 9 (f) (12)
87.
Where all combustion air is provided by a mechanical air supply system, the combustion air shall be supplied from the outdoors at a minimum rate of ___ of the total input rating of all appliances located within the space.
a)
0.15 cubic feet per minute per 1,000 Btu/h
b)
0.25 cubic feet per minute per 1,000 Btu/h
c)
0.35 cubic feet per minute per 1,000 Btu/h
d)
0.45 cubic feet per minute per 1,000 Btu/h
e)
IFGC 304.9
88.
The 2003 International Mechanical Code states that for a heating system in an office building which provides air in excess of ___ CFM, automatic shutoff shall be provided for by smoke detectors.
a)
1000
b)
2000
c)
5000
d)
10000
e)
IMC 606.2.1
89.
Commercial kitchen grease ducts shall be designed for the type of cooking appliance and hood served. If the installation calls for a Type 1 Hood, the grease duct must be a minimum thickness steel gage of ___.
a)
18 gage
b)
16 gage
c)
14 gage
d)
12 gage
e)
IMC 506.3.1.1
90.
A residential bathroom needs to be provided with an intermittent exhaust. THE LEAST "cfm" allowed for this specific area is ___.
a)
100 cfm
b)
25 cfm
c)
50 cfm
d)
75 cfm
e)
IMC Table 403.3 footnote f
91.
Where the drain pipes from more than one unit are manifolded together for condensate drainage, the pipe or tubing shall be sized according to the equipment capacity. What would be the minimum size if the requirement was 65 tons of refrigerant?
a)
1-1/4 inch
b)
1 inch
c)
7/8 inch
d)
3/4 inch
e)
IMC Table 307.2.2
92.
Equipment and appliances having an ignition source shall be elevated such that the source of ignition is not less than ___ above the floor in hazardous locations and public garages, and motor fuel-dispensing facilities.
a)
6"
b)
12"
c)
18"
d)
20" or more
e)
IFGC 305.3
93.
When installing semi-rigid metallic tubing and metallic fittings for a gas furnace, the lengths shall not exceed ___ and shall be located entirely in the same room as the appliance.
a)
3 feet
b)
6 feet
c)
9 feet
d)
12 feet
e)
IFGC 411.1.3
94.
Where equipment replacements and repairs are required to be performed in an emergency situation, the permit application shall be submitted within ___ to the department of inspection.
a)
5 working days
b)
1 working day
c)
next working day
d)
same working day
e)
IFGC 106.1
95.
Sheet metal ducts shall be horizontally supported with approved hangers at intervals NOT exceeding ___ feet or by other duct support systems designed in accordance with code.
a)
14 feet
b)
16 feet
c)
12 feet
d)
10 feet (supported in accordance with the manufacturer's instructions.)
e)
IMC 603.1
96.
Grease filters shall be installed at an angle of NOT LESS than ___ degrees from the horizontal and shall be equipped with a drip tray beneath the lower edge of the filters.
a)
90 degrees
b)
60 degrees
c)
45 degrees
d)
30 degrees
e)
IMC 507.2.8.2
97.
Exposed optical-fiber raceways installed in concealed spaces above suspended ceilings used as air plenums shall ___.
a)
NOT be permitted by the 2003 International Mechanical Code
b)
have a maximum flame-spread index of 25
c)
exhibit a flame travel/spread of five feet or less
d)
have a maximum smoke-developed rating of 50
e)
IMC 602.2.1.1
98.
International fuel gas code emphasizes that the test pressure in gas piping to be used shall be AT LEAST ___psig.
a)
20
b)
40
c)
3
d)
10
e)
IFGC 406.4.1
99.
What type of spaces labeled OSHA as areas of limited egress that are subject to the accumulation of toxic or flammable contaminants or an oxygen deficient atmosphere?
a)
confined spaces
b)
void spaces
c)
non-accessible spaces
d)
limited spaces
e)
OSHA 146 (b) (2)
100.
The minimum unobstructed total area of the return-air ducts from a 300,000 Btu/h (output rating) blower-type furnace is ___ square inches.
a)
60
b)
150
c)
300
d)
600
e)
IFGC 618.2
100 %
