General Engineering A | Comprehensive Exam Study Guide, Questions & Answers
A low voltage system for a solar system would be _____. D) 24 Volts
A) 6 Volts
B) 36 Volts
C) 12 Volts
D) 24 Volts
An expansion tank is required for which one of the B) Hot Water
following systems?
Hot water-heating systems shall be provided with an air expansion tank securely
A) Air fastened to the structure. Supports shall be adequate to carry twice the weight of
B) Hot Water the tank filled with water without placing any strain on connecting piping. ~ Uniform
C) Hydronic (Oil) Solar Energy Code 2009 407.1 Where Required. An expansion tank shall be
D) Antifreeze installed in a hydronic system to control thermal expansion. ~ Universal Solar
Energy and Hydronics Code 2015
The photovoltaic system disconnecting means shall A) 6 Switches or 6 Circuit Breakers
consist of not more than ___.
Maximum Number of Disconnects. The photovoltaic system disconnecting means
A) 6 Switches or 6 Circuit Breakers shall consist of not more than six switches or six circuit breakers mounted in a
B) 3 Switches or 3 Circuit Breakers single enclosure, in a group of separate enclosures, or in or on a switchboard.
C) 10 Switches or 10 Circuit Breakers
D) 1 Switch or Circuit Breaker
What is red used for in utility markings? B) Electric
A) Gas Electric Power Distribution - Red
B) Electric Gas, Oil Distribution - Yellow
C) Sewer Telephone, Cable, Fiber Optics - Orange
D) Communications, phone, tv Water Systems - Blue
Sanitary Sewer Systems - Green
Reclaimed Water - Purple
What is the minimum height for traffic cones that moves D) 18 Inches
traffic from lane to lane?
Cones shall be predominantly orange and shall be made of a material that can be
A) 24 Inches struck without causing damage to the impacting vehicle. For daytime and low-speed
B) 22 Inches roadways, cones shall be not less than 18 inches in height. When cones are used
C) 12 Inches on freeways and other high-speed highways or at night on all highways, or when
D) 18 Inches more conspicuous guidance is needed, cones shall be a minimum of 28 inches in
height
What type of gaskets are used in bronze flanges in gas D) Full Faced
piping?
Full-face gaskets shall be used with all bronze flanges and may be used with Class
A) Thin Ones 25 or 125 cast iron flanges. Flat ring gaskets wit
B) Corrigulated
C) Flat Ring
D) Full Faced
Each operator of a construction site must apply for A) All of the above
coverage under the Construction General Permit by filing a
Notice of Intent with the ADEQ. The Operator is?
A) All of the above
B) The person who has day-to-day control and supervision
of construction activities.
C) The owner and\or the developer
D) The person Who has control over construction plans
and sp
What is the minimum thickness of a grounding plate on the B) .06 inches
butt (bottom) of a pole?
Pole-butt plates Subject to the limitations of Rule 94B4a, a pole-butt plate on the
A) 0.08 inches base of a wooden pole, possibly folded up around the base of the pole butt, may be
B) 0.06 inches considered an acceptable electrode in locations where the limitations of Rule 96 are
C) 0.10 inches met. The plates shall be not less than 6 mm (1/4 in) thick if of ferrous metal and not
D) 0.04 inches less than 1.5 mm (0.06 in) thick if of nonferrous metal. Further, the plate area
exposed to the soil shall be not less than 0.046 m2 (0.5 ft2).
Stuvia 2026-2027
, General Engineering A | Comprehensive Exam Study Guide, Questions & Answers
When is a charger or charge control NOT required in a C) When the maximum current multipied by 1 hour is less than 3% of the rated
photovoltaic system? battery capacity
A) ? The PV source circuit shall be considered to comply with the requirements of
B) When the sun is shining 706.23 if: (1) The PV source circuit is matched to the voltage rating and charge
C) When the maximum current multipied by 1 hour is less current requirements of the interconnected battery cells and, (2) The maximum
than 3% of the rated battery capacity charging current multiplied by 1 hour is less than 3 percent of the rated battery
D) ? capacity expressed in ampere-hours or as recommended by the battery
manufacturer
What is the maximum operating temperature for pipelines B) 250 degrees
with neoprene gasket material?
A) 180 degrees
B) 250 degrees
C) 150 degrees
D) 210 degrees
The average amount of solar radiation reaching the earth's A) Solar Constant
atmosphere per unit time is known as?
The average amount of solar radiation reaching the earth's atmosphere per unit
A) Solar Constant time [about 2 langleys per minute [1395 J/(m2•s)].
B) Average Solar Constant
C) Atmospheric Irradiation Constant
D) Solar Loss Coefficient
A stand alone photovoltaic system (PV) that only contains D) direct coupled
a module or array and is only connected to a DC load is
what type of system configuration? A direct-coupled PV system is a type of stand-alone system where the output of a
PV module or array is directly connected to a DC load. These systems do not
A) self charging include any power conditioning equipment or electrical energy storage. The only
B) charge controlled other components are BOS components such as mounting systems and
C) self regulating disconnects. Without batteries, direct-coupled systems are appropriate only when
D) direct coupled energy demand coincides with energy generation (when the sun is shining).
Because PV output varies with irradiance, the load must also be capable of
operating over a range of voltages.
Grounded dc photovoltaic arrays located on dwellings shall D) DC GFCI
be provided with _____ to reduce fire hazards.
PV system dc circuits that exceed 30 volts or 8 amperes shall be provided with de
A) Fire suppression system ground-fault protection meeting the requirements of 690.41(B)(1) and (B)(2) to
B) ARC fault reduce fire hazards.
C) Fire alarm
D) DC GFCI
On a path with sign markings for bicycles and shared use, B) 5 feet
what is the maximum height above the edge of the path
can the sign be placed?
A) 6 feet
B) 5 feet
C) 8 feet
D) 4 feet
The quantity of solar radiation incident on a unit surface D) Instantaneous Irradiation
area in unit time is known as?
The quantity of solar radiation incident on a unit surface area in unit time, measured
A) Sun Collective in btu/hr/ft^2 (W/m^2).
B) Solar Timing
C) Quantitative Array
D) Instantaneous Irradiation
When welding, all hoses in use, carrying acetylene, C) At the start of each work shift
oxygen, natural or manufactured fuel gas shall be
inspected: All hose in use, carrying acetylene, oxygen, natural or manufactured fuel gas, or
any gas or substance which may ignite or enter into combustion, or be in any way
A) Once a year harmful to employees, shall be inspected at the beginning of each working shift.
B) Once a week Defective hose shall be removed from service
C) At the start of each work shift
D) Once a month
Stuvia 2026-2027
, General Engineering A | Comprehensive Exam Study Guide, Questions & Answers
How close to a driveway can a septic tank be? A) 5 feet
A) 5 feet Facility Design for Type 4 On-site Wastewater Treatment Facilities C. Setbacks. The
B) 25 feet following setbacks apply unless the Department: 5 Feet Measured horizontally to
C) 10 feet the nearest edge of an on-site wastewater treatment facility excavation. A person
D) 15 feet may place a properly reinforced and protected wastewater treatment facility, except
for disposal works, at any location relative to a driveway if access openings, risers,
and covers carry the design load and are protected from inflow.
The ampacity of a grounded neutral conductor of a 3 D) The maximum load between the neutral and any ungrounded conductor and plus
phase, 4 wire wye connected system used on a the inverter output rating
photovoltaic system shall not exceed:
Conductor. If a single-phase, 2-wire inverter output is connected to the neutral
A) The name plate rating listed on the equipment conductor and one ungrounded conductor (only) of a 3-wire system or of a 3-phase,
B) The maximum load between all ungrounded conductors 4-wire, wye-connected system, the maximum load connected between the neutral
and the unbalanced load on the neutral conductor and any one ungrounded conductor plus the inverter output rating shall
C) The ampere rating for the conductor listed on table not exceed the ampacity of the neutral conductor. A conductor used solely for
310.16 instrumentation, voltage detection, or phase detection, and connected to a single-
D) The maximum load between the neutral and any phase or 3-phase utility-interactive inverter, shall be permitted to be sized at less
ungrounded conductor and plus the inverter output rating than the ampacity of the other current-carrying conductors and shall be sized equal
to or larger than the equipment grounding conductor.
A Differential controller is used to control _____. D) the pump
A) pressure relief valve Control principles for temperature difference control Two temperature sensors are
B) the expansion tank required for standard temperature difference control. One measures the
C) air valve temperature at the hottest part of the solar circuit before the collector output [flow);
D) the pump the other measures the temperature in the store at the height of the solar circuit
heat exchanger. The temperature signals from the sensors (resistance values) are
compared in a control unit. The pump is switched on via a relay when the switch-on
temperature is reached. Drainback systems, when well designed so that no water is
left in the collector or any piping that could freeze when the pump is switched off,
automatically work together correctly with a temperature differential controller.
If there is poor air quality in a trench 5 feet or deeper you D) Have it inspected before employees enter trench
should _____.
A) Have it inspected daily
B) Have it inspected at the end of the day
C) Have it inspected if oxygen levels are below 25%
D) Have it inspected before employees enter trench
A Drain Down Solar System has two solenoids; one is D) opens the freexe valve
normally open and the other is normally closed. To prevent
freezing of the system the second solenoid _____. In a drain down system, sensors and a controller activate one or more automatic
valves that isolate the collector loop from the tank. The automatic valve should be
A) turns off the pump installed to allow collector loop drainage when power to the electrically operated
B) drains the collector valve is interrupted. The collectors and piping for these systems must be installed
C) opens the pressure relief valve so that no gravity traps or low spots occur so that the collector loop fluid will drain
D) opens the freexe valve totally by gravity.
The EPA General Permit requires that a _____ be installed C) sediment basin
in any drainage location where more than 10 acres in the
upstream area are disturbed at one time. The EPA General Permit requires that, where it is attainable, a temporary or
permanent sediment basin be installed in any drainage location where more than 10
A) earth dike acres in the upstream drainage area are disturbed at one rime.
B) gravel filter
C) sediment basin
D) silt fence
Stuvia 2026-2027
, General Engineering A | Comprehensive Exam Study Guide, Questions & Answers
Where distribution equipment, including switchboards and B) The interconnection point shall be on the load side of all ground-fault protection
panels, is fed simultaneously by a primary power source, equipment.
which of the following does not apply?
Ground-Fault Protection. Where ground-fault protection is used, the output of an
A) Equipment containing overcurrent devices in circuits interactive system shall be connected to the supply side of the ground-fault
supplying power to a busbar or conductor supplied from protection.
multiple sources shall be marked to indicate the presence
of all sources.
B) The interconnection point shall be on the load side of all
ground-fault protection equipment.
C) Each source interconnection shall be made at a
dedicated circuit breaker or fusible disconnecting means
D) The sum of the ampere ratings of overcurrent devices in
circuits supplying power to a busbar or conductor shall not
exceed 120 percent of the rating of the busbar or
conductor.
Which direction should the collector panels be facing in the A) True South
Northern Hemisphere?
Ideally, the collector should face directly south in the northern hemisphere and
A) True South directly north in the southern hemisphere. However, facing the collector within 30°
B) Magnetic North to 45° either east or west of due south or north reduces performance by only about
C) True North 10 percent. A compass may be used to determine true south or north.
D) Magnetic South
What is the best fluid to use for the transfer of heat in a A) Distilled water
drainback solar system? or What is a major advantage of a
drainback system? Drainback systems offer freeze protection and high-limit protection because the
collectors empty by gravity when the system pump is not operating. Since these
A) Distilled water differentially controlled systems often use distilled water as the heat collection fluid,
B) Hydrocarbons they offer improved heat transfer to the potable water. (This is because water has
C) Glycol better heat System Types transfer capabilities than other heat transfer fluids such
D) Potable Water as glycols or hydrocarbons.)
What is a cost effective method of lowering the water table C) Wellpoint pumping
by de-watering an excavation site?
When ground water is a problem, consider using a wellpoint pumping system to
A) Adding gypsum to the soil control the water level. This helps in two ways. First, it allows the scrapers to work
B) Dig trenches away from site longer before the hoe is needed. And second, when the hoe is finally required, the
C) Wellpoint pumping wellpoints reduce the amount of water that will seep into the channel, making
D) Trench box installation excavation and grade checking easier.
That part of the solar collector that receives the incident B) Absorber
radiation energy is called?
That part of the solar collector that receives the incident radiation energy.
A) Backflow connection
B) Absorber
C) Airbreak
D) Aperture
How do you know when concrete is vibrated enough? B) When large bubbles of trapped air stop coming to the top.
A) ? Adequacy of internal vibration is judged by changes in the surface appearance of
B) When large bubbles of trapped air stop coming to the the concrete. Changes to watch for are the embedment of large aggregate particles,
top. general batch leveling, the appearance of a thin film of mortar on the top surface,
C) When the vibrator goes to the bottom under its own and the cessation of large bubbles of entrapped air escaping at the surface.
weight.
D) ?
The maximum length of a leach line or disposal trench is B) 100 feet
_____ feet.
Trenches Minimum Maximum: 1. Number of trenches 1 (2 are recommended) No
A) 50 feet Maximum, 2. Length of trench - 100 feet, 3. Bottom width of trench 12 inches to 36
B) 100 feet inches
C) 150 feet
D) 75 feet
Stuvia 2026-2027
A low voltage system for a solar system would be _____. D) 24 Volts
A) 6 Volts
B) 36 Volts
C) 12 Volts
D) 24 Volts
An expansion tank is required for which one of the B) Hot Water
following systems?
Hot water-heating systems shall be provided with an air expansion tank securely
A) Air fastened to the structure. Supports shall be adequate to carry twice the weight of
B) Hot Water the tank filled with water without placing any strain on connecting piping. ~ Uniform
C) Hydronic (Oil) Solar Energy Code 2009 407.1 Where Required. An expansion tank shall be
D) Antifreeze installed in a hydronic system to control thermal expansion. ~ Universal Solar
Energy and Hydronics Code 2015
The photovoltaic system disconnecting means shall A) 6 Switches or 6 Circuit Breakers
consist of not more than ___.
Maximum Number of Disconnects. The photovoltaic system disconnecting means
A) 6 Switches or 6 Circuit Breakers shall consist of not more than six switches or six circuit breakers mounted in a
B) 3 Switches or 3 Circuit Breakers single enclosure, in a group of separate enclosures, or in or on a switchboard.
C) 10 Switches or 10 Circuit Breakers
D) 1 Switch or Circuit Breaker
What is red used for in utility markings? B) Electric
A) Gas Electric Power Distribution - Red
B) Electric Gas, Oil Distribution - Yellow
C) Sewer Telephone, Cable, Fiber Optics - Orange
D) Communications, phone, tv Water Systems - Blue
Sanitary Sewer Systems - Green
Reclaimed Water - Purple
What is the minimum height for traffic cones that moves D) 18 Inches
traffic from lane to lane?
Cones shall be predominantly orange and shall be made of a material that can be
A) 24 Inches struck without causing damage to the impacting vehicle. For daytime and low-speed
B) 22 Inches roadways, cones shall be not less than 18 inches in height. When cones are used
C) 12 Inches on freeways and other high-speed highways or at night on all highways, or when
D) 18 Inches more conspicuous guidance is needed, cones shall be a minimum of 28 inches in
height
What type of gaskets are used in bronze flanges in gas D) Full Faced
piping?
Full-face gaskets shall be used with all bronze flanges and may be used with Class
A) Thin Ones 25 or 125 cast iron flanges. Flat ring gaskets wit
B) Corrigulated
C) Flat Ring
D) Full Faced
Each operator of a construction site must apply for A) All of the above
coverage under the Construction General Permit by filing a
Notice of Intent with the ADEQ. The Operator is?
A) All of the above
B) The person who has day-to-day control and supervision
of construction activities.
C) The owner and\or the developer
D) The person Who has control over construction plans
and sp
What is the minimum thickness of a grounding plate on the B) .06 inches
butt (bottom) of a pole?
Pole-butt plates Subject to the limitations of Rule 94B4a, a pole-butt plate on the
A) 0.08 inches base of a wooden pole, possibly folded up around the base of the pole butt, may be
B) 0.06 inches considered an acceptable electrode in locations where the limitations of Rule 96 are
C) 0.10 inches met. The plates shall be not less than 6 mm (1/4 in) thick if of ferrous metal and not
D) 0.04 inches less than 1.5 mm (0.06 in) thick if of nonferrous metal. Further, the plate area
exposed to the soil shall be not less than 0.046 m2 (0.5 ft2).
Stuvia 2026-2027
, General Engineering A | Comprehensive Exam Study Guide, Questions & Answers
When is a charger or charge control NOT required in a C) When the maximum current multipied by 1 hour is less than 3% of the rated
photovoltaic system? battery capacity
A) ? The PV source circuit shall be considered to comply with the requirements of
B) When the sun is shining 706.23 if: (1) The PV source circuit is matched to the voltage rating and charge
C) When the maximum current multipied by 1 hour is less current requirements of the interconnected battery cells and, (2) The maximum
than 3% of the rated battery capacity charging current multiplied by 1 hour is less than 3 percent of the rated battery
D) ? capacity expressed in ampere-hours or as recommended by the battery
manufacturer
What is the maximum operating temperature for pipelines B) 250 degrees
with neoprene gasket material?
A) 180 degrees
B) 250 degrees
C) 150 degrees
D) 210 degrees
The average amount of solar radiation reaching the earth's A) Solar Constant
atmosphere per unit time is known as?
The average amount of solar radiation reaching the earth's atmosphere per unit
A) Solar Constant time [about 2 langleys per minute [1395 J/(m2•s)].
B) Average Solar Constant
C) Atmospheric Irradiation Constant
D) Solar Loss Coefficient
A stand alone photovoltaic system (PV) that only contains D) direct coupled
a module or array and is only connected to a DC load is
what type of system configuration? A direct-coupled PV system is a type of stand-alone system where the output of a
PV module or array is directly connected to a DC load. These systems do not
A) self charging include any power conditioning equipment or electrical energy storage. The only
B) charge controlled other components are BOS components such as mounting systems and
C) self regulating disconnects. Without batteries, direct-coupled systems are appropriate only when
D) direct coupled energy demand coincides with energy generation (when the sun is shining).
Because PV output varies with irradiance, the load must also be capable of
operating over a range of voltages.
Grounded dc photovoltaic arrays located on dwellings shall D) DC GFCI
be provided with _____ to reduce fire hazards.
PV system dc circuits that exceed 30 volts or 8 amperes shall be provided with de
A) Fire suppression system ground-fault protection meeting the requirements of 690.41(B)(1) and (B)(2) to
B) ARC fault reduce fire hazards.
C) Fire alarm
D) DC GFCI
On a path with sign markings for bicycles and shared use, B) 5 feet
what is the maximum height above the edge of the path
can the sign be placed?
A) 6 feet
B) 5 feet
C) 8 feet
D) 4 feet
The quantity of solar radiation incident on a unit surface D) Instantaneous Irradiation
area in unit time is known as?
The quantity of solar radiation incident on a unit surface area in unit time, measured
A) Sun Collective in btu/hr/ft^2 (W/m^2).
B) Solar Timing
C) Quantitative Array
D) Instantaneous Irradiation
When welding, all hoses in use, carrying acetylene, C) At the start of each work shift
oxygen, natural or manufactured fuel gas shall be
inspected: All hose in use, carrying acetylene, oxygen, natural or manufactured fuel gas, or
any gas or substance which may ignite or enter into combustion, or be in any way
A) Once a year harmful to employees, shall be inspected at the beginning of each working shift.
B) Once a week Defective hose shall be removed from service
C) At the start of each work shift
D) Once a month
Stuvia 2026-2027
, General Engineering A | Comprehensive Exam Study Guide, Questions & Answers
How close to a driveway can a septic tank be? A) 5 feet
A) 5 feet Facility Design for Type 4 On-site Wastewater Treatment Facilities C. Setbacks. The
B) 25 feet following setbacks apply unless the Department: 5 Feet Measured horizontally to
C) 10 feet the nearest edge of an on-site wastewater treatment facility excavation. A person
D) 15 feet may place a properly reinforced and protected wastewater treatment facility, except
for disposal works, at any location relative to a driveway if access openings, risers,
and covers carry the design load and are protected from inflow.
The ampacity of a grounded neutral conductor of a 3 D) The maximum load between the neutral and any ungrounded conductor and plus
phase, 4 wire wye connected system used on a the inverter output rating
photovoltaic system shall not exceed:
Conductor. If a single-phase, 2-wire inverter output is connected to the neutral
A) The name plate rating listed on the equipment conductor and one ungrounded conductor (only) of a 3-wire system or of a 3-phase,
B) The maximum load between all ungrounded conductors 4-wire, wye-connected system, the maximum load connected between the neutral
and the unbalanced load on the neutral conductor and any one ungrounded conductor plus the inverter output rating shall
C) The ampere rating for the conductor listed on table not exceed the ampacity of the neutral conductor. A conductor used solely for
310.16 instrumentation, voltage detection, or phase detection, and connected to a single-
D) The maximum load between the neutral and any phase or 3-phase utility-interactive inverter, shall be permitted to be sized at less
ungrounded conductor and plus the inverter output rating than the ampacity of the other current-carrying conductors and shall be sized equal
to or larger than the equipment grounding conductor.
A Differential controller is used to control _____. D) the pump
A) pressure relief valve Control principles for temperature difference control Two temperature sensors are
B) the expansion tank required for standard temperature difference control. One measures the
C) air valve temperature at the hottest part of the solar circuit before the collector output [flow);
D) the pump the other measures the temperature in the store at the height of the solar circuit
heat exchanger. The temperature signals from the sensors (resistance values) are
compared in a control unit. The pump is switched on via a relay when the switch-on
temperature is reached. Drainback systems, when well designed so that no water is
left in the collector or any piping that could freeze when the pump is switched off,
automatically work together correctly with a temperature differential controller.
If there is poor air quality in a trench 5 feet or deeper you D) Have it inspected before employees enter trench
should _____.
A) Have it inspected daily
B) Have it inspected at the end of the day
C) Have it inspected if oxygen levels are below 25%
D) Have it inspected before employees enter trench
A Drain Down Solar System has two solenoids; one is D) opens the freexe valve
normally open and the other is normally closed. To prevent
freezing of the system the second solenoid _____. In a drain down system, sensors and a controller activate one or more automatic
valves that isolate the collector loop from the tank. The automatic valve should be
A) turns off the pump installed to allow collector loop drainage when power to the electrically operated
B) drains the collector valve is interrupted. The collectors and piping for these systems must be installed
C) opens the pressure relief valve so that no gravity traps or low spots occur so that the collector loop fluid will drain
D) opens the freexe valve totally by gravity.
The EPA General Permit requires that a _____ be installed C) sediment basin
in any drainage location where more than 10 acres in the
upstream area are disturbed at one time. The EPA General Permit requires that, where it is attainable, a temporary or
permanent sediment basin be installed in any drainage location where more than 10
A) earth dike acres in the upstream drainage area are disturbed at one rime.
B) gravel filter
C) sediment basin
D) silt fence
Stuvia 2026-2027
, General Engineering A | Comprehensive Exam Study Guide, Questions & Answers
Where distribution equipment, including switchboards and B) The interconnection point shall be on the load side of all ground-fault protection
panels, is fed simultaneously by a primary power source, equipment.
which of the following does not apply?
Ground-Fault Protection. Where ground-fault protection is used, the output of an
A) Equipment containing overcurrent devices in circuits interactive system shall be connected to the supply side of the ground-fault
supplying power to a busbar or conductor supplied from protection.
multiple sources shall be marked to indicate the presence
of all sources.
B) The interconnection point shall be on the load side of all
ground-fault protection equipment.
C) Each source interconnection shall be made at a
dedicated circuit breaker or fusible disconnecting means
D) The sum of the ampere ratings of overcurrent devices in
circuits supplying power to a busbar or conductor shall not
exceed 120 percent of the rating of the busbar or
conductor.
Which direction should the collector panels be facing in the A) True South
Northern Hemisphere?
Ideally, the collector should face directly south in the northern hemisphere and
A) True South directly north in the southern hemisphere. However, facing the collector within 30°
B) Magnetic North to 45° either east or west of due south or north reduces performance by only about
C) True North 10 percent. A compass may be used to determine true south or north.
D) Magnetic South
What is the best fluid to use for the transfer of heat in a A) Distilled water
drainback solar system? or What is a major advantage of a
drainback system? Drainback systems offer freeze protection and high-limit protection because the
collectors empty by gravity when the system pump is not operating. Since these
A) Distilled water differentially controlled systems often use distilled water as the heat collection fluid,
B) Hydrocarbons they offer improved heat transfer to the potable water. (This is because water has
C) Glycol better heat System Types transfer capabilities than other heat transfer fluids such
D) Potable Water as glycols or hydrocarbons.)
What is a cost effective method of lowering the water table C) Wellpoint pumping
by de-watering an excavation site?
When ground water is a problem, consider using a wellpoint pumping system to
A) Adding gypsum to the soil control the water level. This helps in two ways. First, it allows the scrapers to work
B) Dig trenches away from site longer before the hoe is needed. And second, when the hoe is finally required, the
C) Wellpoint pumping wellpoints reduce the amount of water that will seep into the channel, making
D) Trench box installation excavation and grade checking easier.
That part of the solar collector that receives the incident B) Absorber
radiation energy is called?
That part of the solar collector that receives the incident radiation energy.
A) Backflow connection
B) Absorber
C) Airbreak
D) Aperture
How do you know when concrete is vibrated enough? B) When large bubbles of trapped air stop coming to the top.
A) ? Adequacy of internal vibration is judged by changes in the surface appearance of
B) When large bubbles of trapped air stop coming to the the concrete. Changes to watch for are the embedment of large aggregate particles,
top. general batch leveling, the appearance of a thin film of mortar on the top surface,
C) When the vibrator goes to the bottom under its own and the cessation of large bubbles of entrapped air escaping at the surface.
weight.
D) ?
The maximum length of a leach line or disposal trench is B) 100 feet
_____ feet.
Trenches Minimum Maximum: 1. Number of trenches 1 (2 are recommended) No
A) 50 feet Maximum, 2. Length of trench - 100 feet, 3. Bottom width of trench 12 inches to 36
B) 100 feet inches
C) 150 feet
D) 75 feet
Stuvia 2026-2027
