Local 483 Apprenticeship Practice Exam

These questions are part of the practice quiz. Start practicing

• What is Ohm's Law in its basic form?
• May the underground main be flushed after connection to overhead sprinkler system piping?
• Which statement is true about AWG sizing?
• Which three elements are required for a fire to burn?
• What is arc flash and why is it dangerous?
• After connecting overhead piping, the underground main may be flushed.
• Fire burns because three elements are present
• In a steam piping system, what device is used to remove condensate?
• Water extinguishers are used for Class A fires.
• In electrical design, what is the purpose of a load calculation?
• Which factor should be used to protect underground sprinkler mains from freezing?
• The ratio 3:5 scaled by a factor of 4 yields which pair?
• The refrigerant R-22 is now commonly used in newer systems.
• What does the voltage rating on insulation indicate?
• Who invented the sprinkler system that used a barrel of water containing a gunpowder charge and a fuse that caused the barrel to rupture?
• Which factors are used when selecting the correct AWG size on a conductor sizing chart?
• Which line type on a blueprint represents edges not visible in the current view?
• Which factors influence conductor ampacity?
• Which statement best describes the standard method to verify a GFCI's proper operation after installation?
• Which component initiates an alarm when water flows through the sprinkler system?
• In a series circuit, which statement is true about the current through each component?
• In a blueprint drawing, which line type most typically represents visible edges and outlines?
• Which sprinkler system is the most prevalent in use?
• What is the purpose of a junction box?
• Which of the following is a common hammer type used for shaping metal?
• What is the typical residential voltage in the United States?
• Which fitting would you use to connect two pipes in a straight line while matching their diameter?
• Which statement about an isometric drawing is correct?
• What information does a Safety Data Sheet provide?
• In a parallel circuit, how does adding another resistor in parallel affect the total resistance?
• How should circuit conductors be labeled?
• BTU is a unit used to describe what property?
• Petroleum-based lubricants will NOT be used on VICS.
• If a circuit has a current of 2 A through a 3 Ω resistor, what is the voltage across that resistor?
• Which sprinkler system is characterized by pipes that are filled with water and discharge immediately through activated heads?
• What does a section view show?
• What should be placed on top of CPVC piping when installed in an attic?
• In insulation, what does R-value indicate?
• Which gasket size corresponds to a 1-1/2 inch groove?
• When interpreting rough-in dimensions from construction drawings, which method should you use?
• What is pigtailing in wiring?
• Which of the following is a common prying tool?
• Which of the following is NOT a fire triangle element?
• In what year did Major Harrison invent the first sprinkler head but not patent it?
• What is the purpose of lockout/tagout procedures?
• A right triangle has a base of 9 inches and a height of 12 inches. What is its area?
• How many points of contact are recommended when climbing a ladder?
• Normal gasket size for 3 inch groove?
• What is the total resistance of a series circuit containing 4 Ω and 8 Ω resistors?
• Which of the following is a form of fall protection commonly used in construction?
• Which symptom most clearly indicates an overloaded circuit?
• What is the purpose of a detail view on a plan?
• What is the difference between rigid metal conduit (RMC) and electrical metallic tubing (EMT)?
• A bolt has 24 threads per inch. What is the pitch in inches per thread?
• In a parallel circuit with a 6 Ω and a 3 Ω resistor across a 12 V source, what is the total current?
• What is a trap in plumbing?
• Who invented the first sprinkler head but did not patent it?
• Which of the following is considered fall protection equipment?
• Schedule 40 pipe describes which aspect?
• Why is maintaining a proper bend radius in electrical conduit important?
• Which class of fires uses extinguishers suitable for ordinary combustibles such as wood and paper?
• In a 120/240 V system in the United States, what is the color code for hot conductors?
• Dry pipe systems are typically used in which type of building conditions?
• In a standard single-phase system, what is the neutral conductor?
• What is the purpose of a level in construction?
• Which extinguisher type is recommended for metal fires such as potassium and sodium?
• Automatic fire sprinklers are designed to extinguish fires simultaneously on different floors.
• What does FDC stand for in fire protection systems?
• What is the typical temperature rating for 'Ordinary' sprinkler heads?
• Which sequence correctly describes the typical lockout/tagout steps?
• In Marcus Ruthenberg's glass-ball sprinkler, what holds the lever arrangement in place?
• Approximately how many BTU are required to vaporize one pound of water?
• Which unit pair is used to measure flow and pressure in sprinkler systems?
• What is a standard method to test a GFCI receptacle?
• Which sprinkler system is described as containing pressurized water in all pipes and has some form of valve in each protected area, and is the most prevalent system?
• What instrument is used to measure insulation resistance?
• Normal gasket size for 1-1/2 inch groove?
• Where should labels for circuit conductors be placed?
• What is the function of a valve on a piping system?
• If a rectangle has length 24 inches and width 18 inches, what is its perimeter in inches?
• What is the purpose of a conductor sizing chart?
• In pipe sizing, what does 'schedule' refer to?
• What is the main purpose of bonding the neutral to the grounding electrode system at service equipment?
• Which sprinkler heads are described as pointing up toward the ceiling?
• When joining two copper pipes, what is the typical method?
• Which fire protection system uses a pre-activation step to release water into the pipes?
• Which characteristic is most closely associated with Schedule 40 pipe?
• Which statement about the role of a steam trap is correct?
• When inspecting PPE, which statement is true about its suitability for a hazard?
• For fires involving combustible metals, which extinguisher type is specified?
• What is neutral-to-ground bonding at service equipment?
• What does NPT stand for in piping contexts?
• Which extinguisher types are suitable for Class C fires?
• Which of the following is NOT listed as a common prying tool in the material?
• Ignition temperature of ordinary combustibles lies between
• If you double the length of a conductor in a circuit, what happens to the resistance and voltage drop?
• Can you install sprinkler head in CPVC before installing drops?
• In a lockout/tagout procedure, which step directly follows shutting down equipment?
• Measuring insulation resistance helps assess which aspect of an electrical system?
• What does a red-tag on equipment in a work area indicate?
• What is the purpose of the American Wire Gauge (AWG) system?
• Which inventor designed a sprinkler with a glass ball held against an open pipe by a double arm lever arrangement held in place by fusible solder?
• Which statement is true about GFCI testing?
• In addition to voltage, current, and resistance, what is another measurement a multimeter can perform?
• What is the typical color of a grounding conductor?
• In a deluge sprinkler system, all heads remain permanently open and water enters the system through a deluge valve when activated. Which system is described?
• On a plan with a scale of 1/4 inch equals 1 foot, how long on the drawing is a 6-foot-long object?
• Which color is typically used for the neutral conductor in a 120/240 V system?
• Which inventor created a sprinkler design that used deflectors or baffles?
• Which item is NOT a hammer, given common hammer types include ball-peen, straight-claw, curved-claw, mallets, and sledgehammers?
• Which of the following is a common type of hammer?
• Which hammer is described by a straight claw used for pulling nails?
• What is the area of a rectangle with length 24 inches and width 18 inches?
• What is the main purpose of a junction box?
• If a measurement is 3 feet 9 inches, how many inches is that?
• What term describes the pressure at which a sprinkler system normally operates?
• What does nominal pipe size refer to?
• What is the proper manual handling technique to lift a heavy object from the floor?
• Which statement best describes water vaporization energy?
• Which statement correctly defines the grounding electrode system?
• Identify the hand tool used for striking and driving nails.
• Which statement describes the difference between Schedule 80 and Schedule 40 pipes for the same NPS?
• Which items are usually included in the title block of construction drawings?
• A circle has a diameter of 8 inches. Using pi = 3.14, what is the approximate area?
• How many inches are in 5 yards?
• Which component is used to isolate a section of piping for maintenance and can stop flow entirely?
• Which value is commonly associated with Ordinary sprinkler head temperature?
• A dimension line reads 2'-8". Convert this length to inches.
• What is a typical side-wall distance from the ceiling for sprinkler placement?
• Which statement is true about a deluge sprinkler system?
• How does ambient temperature affect conductor ampacity?
• What is a conduit bender used for?
• Which feature minimizes water damage by requiring detector-initiated release in a pre-action system?
• The gasket size for an 8 inch groove is 0.750 inches.
• Monoammonium phosphate is used for Class A fires.
• What best describes the difference between grounding and bonding?
• Sodium Bicarbonate (NaHCO3) is used for which classes of fires?
• How does increasing pipe Schedule affect wall thickness and pressure rating?
• Which drawing view is best for studying a small, complex feature with greater clarity?
• The underground main may be flushed after connection is made to overhead sprinkler piping.
• What is the purpose of a vent in a piping system?
• What color typically indicates a warning or caution in safety signage?
• A cross-section reveals what information about a building component?
• For Class A fires, which extinguisher types are appropriate?
• What is the purpose of a panel schedule in electrical work?
• Which items are typically included in the title block besides the project name?
• What must exist at each sprinkler head to ensure proper operation?
• A fire suppression system that contains water in the pipes but will not release water until detectors in the area have been activated is known as what type?
• Which statement about tees is correct?
• What is a splice in electrical wiring?
• Who introduced a ball cartridge that would explode at a hot temperature?
• What does NEC stand for and what is its purpose?
• What is a multimeter used for in electrical work?
• What is a continuity test used for?
• What is the primary use of a dimension line on a blueprint?
• In a Deluge System, what happens when the detection system is activated?
• What is the safest practice before working on any electrical circuit?
• Which class of fire extinguisher is suitable for electrical fires?
• In a piping system, what is the purpose of a vent?
• A gasket size of 0.625 inches is used for a 3 inch groove.
• How many types of Fire Sprinkler Systems exist?
• Which feature describes pre-action systems and helps prevent accidental water releases?
• What is the purpose of a leader line on a drawing?
• In a series circuit with a 12 V source and resistors of 4 Ω and 8 Ω, what is the total current?
• BTU measures energy/heat content.
• Normal gasket size for 8 inch groove?
• If a material cost is $250 and you receive a 20% discount, what is the discount amount?
• Which component is designed to safely carry fault current to the earth?
• With a scale of 1/2" = 1'-0", what drawing length represents 10 feet in reality?
• Class C extinguishers are for energized electrical equipment.
• A bolt has 16 threads per inch. What is the pitch in inches per thread?
• Which units are used to describe flow and pressure in sprinkler design?
• In a parallel circuit, is the voltage across each resistor the same or does it vary?
• What is the color code for grounding in the US?
• Which device is designed to automatically disconnect power when a ground fault is detected?
• What is the purpose of pipe thread sealant or Teflon tape?
• Which PPE items are typically required to protect against arc flash?
• What does SDS stand for?
• What is the difference between a single-pole and a double-pole breaker?
• SSU stands for which sprinkler type?
• What is the difference between a 90-degree elbow and a 45-degree elbow?
• SSU is an abbreviation for Standard Sprinkler Upright.
• In a blueprint, what does a dashed line typically indicate?
• What is a lug in a panel?
• Cooking oils and greases fires are best fought with which extinguisher class?
• What is the purpose of a GFCI?
• Which equation is commonly used to relate flow, area, and velocity?
• Which factor provides protection against heat exposure for CPVC piping installed in an attic?
• During rough-in, what should you verify with scale measurements from the drawings?
• When lifting a heavy load that is too heavy to lift alone, you should:
• Which valve prevents backflow of water from the sprinkler system and initiates an alarm when water flows?
• What is the function of a backflow preventer?
• Who helped to commercialize the automatic sprinklers?
• What is voltage drop and why is it important?
• Which of the following individuals is not listed as a sprinkler inventor or contributor in the material?
• A dimension on a plan reads 3 feet 6 inches. What is this length in inches?
• Which system is designed to minimize accidental discharge by requiring a secondary triggering action before water is released?
• Dry powder extinguishers can be used for A, B, and C.
• What is a typical minimum side clearance from a sprinkler head to the adjacent wall?
• What does a tee fitting do in a piping system?
• A circle has a diameter of 6 inches. What is its approximate area using pi as 3.14?
• Which statement correctly describes isometric drawings?
• A material cost is $320 and you receive a 15% discount. What is the discount amount?
• Most common powders used for extinguishing
• Which action correctly completes the lockout/tagout process before re-energizing?
• Which statement best describes the meaning of a scale notation where 1/4 inch on the drawing equals 1 foot in real size?
• What is a common insulation material used on cold lines?
• What device collects moisture from the system while minimizing air pressure loss?
• Why should flammables be stored in ventilated areas?
• Which sprinkler system consists of closed sprinklers attached to piping that contains air under pressure?
• What is the horizontal structural member that spans above an opening such as a door called?
• Which system uses a deluge valve to allow water into the system when detection occurs?
• How does excessive voltage drop affect devices?
• Which class of extinguisher is typically used for ordinary combustibles like wood and paper?
• In the early sprinkler system, what event caused the barrel to rupture?
• Before servicing, why is testing for zero energy essential?
• How should batteries, fuels, and flammables be stored on site?
• What is the purpose of wire nuts in electrical connections?
• For a fire sprinkler system without a Fire Department Connection (FDC), how is hydraulic pressure determined?
• OSHA's PPE abbreviation stands for?
• How many inches are in 8 feet?
• When should respiratory protection such as a respirator be used?
• What minimum fall protection requirement is commonly needed for work at height on construction sites?
• Propane and butane are examples of Class B fires.
• Auxiliary drains are required for each section of trapped pipe in which types of fire protection systems?
• Lockout/tagout is intended to prevent?
• What is the purpose of pipe insulation?
• Which symptom most clearly indicates an overloaded circuit?
• Which sprinkler system releases water to all sprinkler heads when any head is activated?
• What is the minimum distance in front of a recessed fireplace for an ordinary sprinkler installation?
• What is a bus bar's function in a panel?
• What is the purpose of ground fault protection?
• How do you test a GFCI in the field?
• Which hammer has a curved claw used for nails?
• Class B extinguishers are for flammable liquids and gases like propane and butane.
• Which component is installed above a door opening to transfer loads around the opening?
• Which heads are typically used in mechanical rooms or other inaccessible spaces and spray in a half-circle pattern?
• In HVAC refrigerants, what does R-22 refer to?
• When most substances burn, the actual combustion takes place after the liquid fuel has been vaporized.
• What is a coupling used for?