Postal Exam 955: Study Guide Highlights Q&A Explained.
Goggles Requirement - accurate answers-Always wear goggles when using a
grinder.
Battery Room Safety - accurate answers-Sparks can cause explosions in
battery rooms.
Soldering - accurate answers-Joining metal parts using molten solder.
Welding - accurate answers-Fusing materials using high heat.
Piping - accurate answers-Installation and maintenance of pipe systems.
Lubrication - accurate answers-Application of substances to reduce friction.
Gears - accurate answers-Mechanical components that transmit motion.
Motors - accurate answers-Devices converting electrical energy to mechanical
energy.
Refrigeration - accurate answers-Process of removing heat to cool substances.
Boilers - accurate answers-Devices for heating water or producing steam.
Air Conditioning - accurate answers-System for controlling indoor climate.
Hydraulics - accurate answers-Use of liquid pressure to perform work.
Pneumatics - accurate answers-Use of gas pressure for mechanical motion.
Volt/Ohm Meter - accurate answers-Instrument for measuring voltage and
resistance.
Schematic Reading - accurate answers-Interpreting diagrams of electrical
circuits.
Electronic Components - accurate answers-Basic parts used in electronic
circuits.
, Spatial Relations - accurate answers-Understanding figure matching and
assembly.
Goggles - accurate answers-Protective eyewear required when using a
grinder.
Battery Room Sparks - accurate answers-Can lead to explosive hazards in
confined spaces.
Chain Guards - accurate answers-Devices used to prevent injuries from
moving parts.
Electric Shock Factors - accurate answers-Includes current path, amount, and
duration.
Lockout Devices - accurate answers-Safety mechanisms to prevent accidental
equipment operation.
Plug Lockout - accurate answers-Device that secures a plug to prevent use.
Hasp Lockout - accurate answers-Clamps around a breaker to secure it off.
3-Phase Breaker Lockout - accurate answers-Secures a 3-phase breaker in the
off position.
Gas Cylinder Lockout - accurate answers-Prevents access to a gas cylinder's
main valve.
Lockout Rules - accurate answers-One key per lockout; no spare keys allowed.
Class A Extinguisher - accurate answers-For wood/paper fires; rated by water
amount.
Class B Extinguisher - accurate answers-For flammable liquids; rated by
coverage area.
Class C Extinguisher - accurate answers-For electrical fires; no numerical
rating.
Goggles Requirement - accurate answers-Always wear goggles when using a
grinder.
Battery Room Safety - accurate answers-Sparks can cause explosions in
battery rooms.
Soldering - accurate answers-Joining metal parts using molten solder.
Welding - accurate answers-Fusing materials using high heat.
Piping - accurate answers-Installation and maintenance of pipe systems.
Lubrication - accurate answers-Application of substances to reduce friction.
Gears - accurate answers-Mechanical components that transmit motion.
Motors - accurate answers-Devices converting electrical energy to mechanical
energy.
Refrigeration - accurate answers-Process of removing heat to cool substances.
Boilers - accurate answers-Devices for heating water or producing steam.
Air Conditioning - accurate answers-System for controlling indoor climate.
Hydraulics - accurate answers-Use of liquid pressure to perform work.
Pneumatics - accurate answers-Use of gas pressure for mechanical motion.
Volt/Ohm Meter - accurate answers-Instrument for measuring voltage and
resistance.
Schematic Reading - accurate answers-Interpreting diagrams of electrical
circuits.
Electronic Components - accurate answers-Basic parts used in electronic
circuits.
, Spatial Relations - accurate answers-Understanding figure matching and
assembly.
Goggles - accurate answers-Protective eyewear required when using a
grinder.
Battery Room Sparks - accurate answers-Can lead to explosive hazards in
confined spaces.
Chain Guards - accurate answers-Devices used to prevent injuries from
moving parts.
Electric Shock Factors - accurate answers-Includes current path, amount, and
duration.
Lockout Devices - accurate answers-Safety mechanisms to prevent accidental
equipment operation.
Plug Lockout - accurate answers-Device that secures a plug to prevent use.
Hasp Lockout - accurate answers-Clamps around a breaker to secure it off.
3-Phase Breaker Lockout - accurate answers-Secures a 3-phase breaker in the
off position.
Gas Cylinder Lockout - accurate answers-Prevents access to a gas cylinder's
main valve.
Lockout Rules - accurate answers-One key per lockout; no spare keys allowed.
Class A Extinguisher - accurate answers-For wood/paper fires; rated by water
amount.
Class B Extinguisher - accurate answers-For flammable liquids; rated by
coverage area.
Class C Extinguisher - accurate answers-For electrical fires; no numerical
rating.
