UA Star Plumbing and Pipe Fitting
Industry Exam 2026 Guide
1. 1. If not properly installed a hot gas muffler might D. Oil
trap
A. Hot
B. Superheated vapor C.
Suction gas
D. Oil
2. 2. Unit ventilators are usually equipped with outside D. Both A and B are correct
air dampers :
A. Provide ventilation air during building occupancy
B. Comply with most local or state codes
C. Provide free cooling in winter months
D. Both A and B are correct
3. 3. Copper plating of compressor parts parts B. Caused by contaminants
A. Done at the factory to prevent rusting in the system
B. Caused by contaminants in the system
C unlikely to happen unless the motor has grounded
D prevented by adding ethanol to the system
4. 4. Face and bypass dampers should be adjusted to B Tight shut ott to reduce
provide the possibility of overcool-
A. A mixture of heated or cooled air at all times ing or overheating
B. Tight shut off to reduce the possibility of overcool-
ing or overheating
C the proper air volume at all load conditions
D a uniform air flow rate at low loads
5. 5. With belt driven equipment, alignment of the mo- B. accomplished using a
tor and driven equipment pulleys string or straight edge
A. Is not critical since the belts are flexible Misaligned
pulleys will cause excessive wear on belts , pulleys
, UA Star Plumbing and Pipe Fitting
Industry Exam 2026 Guide
and bearings
B. accomplished using a string or straight edge
C. accomplished when the belts are parallel to one
another
D. accomplished using dial indicator
6. 6. To assist consumers in making an informed choice C. Btuh/watt
when purchasing unitary air conditioning equipment
the efficiency of such units is expressed as Energy
Efficiency Ratio ( EER or SEER the units of which are
A. Btuh / ampere
B. Btuh volt
C. Btuh / watt
D. Btuh / Hp
7. 7. Fire stats located in the air stream of air handling D. All of the above
units
A. Are required in both the supply and return air
streams
B. Should be the manual reset type
C. Should be nonadjustable
D. All of the above
8. 8. Sleeve bearing would typically be used in motor A. Operates with a light load
that : and where noise is factor
A. Operates with a light load and where noise factor
B. Operates with heavy load and where noise is not
a factor
C. Operates with a heavy load a dirty atmosphere
D. Operates with a heavy load in moist atmosphere
9. 9. A bearing used on bottom of a motor where the C. Thrust
shaft positioned vertically is called bearing
, UA Star Plumbing and Pipe Fitting
Industry Exam 2026 Guide
A. Sleeve
B. Ball
C. Thrust
D. Bronze
10. 10. To produce electromagnetism relative motion is B. Conductor
required between a magnetic field and a an :
A. Switch
B. Conductor
C. Element
D. Ground
E. Insulator
11. 11. Materials which do not allow their electrons spin C. Insulators
out of orbit easily are called
A. Conductors
B. Grounds
C. Insulators
D. Elements
E. Magnets
12. 12. Current flowing through conductor in one direc- A. Alternating current
tion for split second then in the opposite direction
for a split second a good definition : Current flowing
through conductor in one direction for split second
then in the opposite direction for a split second a
good definition :
A. Alternating current
B. Direct current
C. Voltage
D. Resistance
E. Wattage
, UA Star Plumbing and Pipe Fitting
Industry Exam 2026 Guide
13. 13. a pressure gauge reads five psig at sea level ele- C. 19.7 psia
vation the corresponding absolute pressure
A. 14.7 psig
B. 14.17 psia
C. 19.7 psia
D. 19.7 psig
14. 14. Solar is the amount of solar thermal energy pro- A. Fractional
duced divided by the water heating energy demand
the building
A. Fractional
B. Ratio
C. Cost
D. Efficiency
15. 15. The portion of the electromagnetic spectrum to D. Visible light
which solar collectors respond is and near infrared
radiation
A. Gamma rays
B. Microwaves
C. Ultra violet light
D. Visible light
16. 16. During winter A. Daylight is shorter and
A. Daylight is shorter and the Northern Hemisphere the Northern Hemisphere
angled away from the sun is angled away from the sun
B. Daylight shorter and the Northern Hemisphere an- .
gled toward from the sun C. Daylight longer and the
Northern Hemisphere is angled away from the sun
D. Daylight is longer and the Northern Hemisphere is
angled toward the sun
17. B. Evaporative condensers
Industry Exam 2026 Guide
1. 1. If not properly installed a hot gas muffler might D. Oil
trap
A. Hot
B. Superheated vapor C.
Suction gas
D. Oil
2. 2. Unit ventilators are usually equipped with outside D. Both A and B are correct
air dampers :
A. Provide ventilation air during building occupancy
B. Comply with most local or state codes
C. Provide free cooling in winter months
D. Both A and B are correct
3. 3. Copper plating of compressor parts parts B. Caused by contaminants
A. Done at the factory to prevent rusting in the system
B. Caused by contaminants in the system
C unlikely to happen unless the motor has grounded
D prevented by adding ethanol to the system
4. 4. Face and bypass dampers should be adjusted to B Tight shut ott to reduce
provide the possibility of overcool-
A. A mixture of heated or cooled air at all times ing or overheating
B. Tight shut off to reduce the possibility of overcool-
ing or overheating
C the proper air volume at all load conditions
D a uniform air flow rate at low loads
5. 5. With belt driven equipment, alignment of the mo- B. accomplished using a
tor and driven equipment pulleys string or straight edge
A. Is not critical since the belts are flexible Misaligned
pulleys will cause excessive wear on belts , pulleys
, UA Star Plumbing and Pipe Fitting
Industry Exam 2026 Guide
and bearings
B. accomplished using a string or straight edge
C. accomplished when the belts are parallel to one
another
D. accomplished using dial indicator
6. 6. To assist consumers in making an informed choice C. Btuh/watt
when purchasing unitary air conditioning equipment
the efficiency of such units is expressed as Energy
Efficiency Ratio ( EER or SEER the units of which are
A. Btuh / ampere
B. Btuh volt
C. Btuh / watt
D. Btuh / Hp
7. 7. Fire stats located in the air stream of air handling D. All of the above
units
A. Are required in both the supply and return air
streams
B. Should be the manual reset type
C. Should be nonadjustable
D. All of the above
8. 8. Sleeve bearing would typically be used in motor A. Operates with a light load
that : and where noise is factor
A. Operates with a light load and where noise factor
B. Operates with heavy load and where noise is not
a factor
C. Operates with a heavy load a dirty atmosphere
D. Operates with a heavy load in moist atmosphere
9. 9. A bearing used on bottom of a motor where the C. Thrust
shaft positioned vertically is called bearing
, UA Star Plumbing and Pipe Fitting
Industry Exam 2026 Guide
A. Sleeve
B. Ball
C. Thrust
D. Bronze
10. 10. To produce electromagnetism relative motion is B. Conductor
required between a magnetic field and a an :
A. Switch
B. Conductor
C. Element
D. Ground
E. Insulator
11. 11. Materials which do not allow their electrons spin C. Insulators
out of orbit easily are called
A. Conductors
B. Grounds
C. Insulators
D. Elements
E. Magnets
12. 12. Current flowing through conductor in one direc- A. Alternating current
tion for split second then in the opposite direction
for a split second a good definition : Current flowing
through conductor in one direction for split second
then in the opposite direction for a split second a
good definition :
A. Alternating current
B. Direct current
C. Voltage
D. Resistance
E. Wattage
, UA Star Plumbing and Pipe Fitting
Industry Exam 2026 Guide
13. 13. a pressure gauge reads five psig at sea level ele- C. 19.7 psia
vation the corresponding absolute pressure
A. 14.7 psig
B. 14.17 psia
C. 19.7 psia
D. 19.7 psig
14. 14. Solar is the amount of solar thermal energy pro- A. Fractional
duced divided by the water heating energy demand
the building
A. Fractional
B. Ratio
C. Cost
D. Efficiency
15. 15. The portion of the electromagnetic spectrum to D. Visible light
which solar collectors respond is and near infrared
radiation
A. Gamma rays
B. Microwaves
C. Ultra violet light
D. Visible light
16. 16. During winter A. Daylight is shorter and
A. Daylight is shorter and the Northern Hemisphere the Northern Hemisphere
angled away from the sun is angled away from the sun
B. Daylight shorter and the Northern Hemisphere an- .
gled toward from the sun C. Daylight longer and the
Northern Hemisphere is angled away from the sun
D. Daylight is longer and the Northern Hemisphere is
angled toward the sun
17. B. Evaporative condensers
