SACA C-202 Questions And Answers Latest Solutions
/. Do you know the primary reason for grounding? - Answer-Equipment grounding limits
the voltage between all metal parts of the system and earth ground to a safe level,
thereby reducing the risk of shock.
/.Can you name the common standards associated with electrical control? - Answer-
National Electrical Code (NEC)
National Electrical Manufacturer's Association (NEMA)
International Electrotechnical Commission (IEC)
Underwriter's Laboratories (UL)
Occupational Safety and Health Administration (OSHA)
/.Can you state the ten basic rules of electrical safety? - Answer--Remove all metal
jewelry
-Be aware of conditions before working on a piece of equipment
-Do not rely on safety devices to protect you
-Never remove the grounding prong on an AC plug
-Always keep your tools and test equipment organized
-Do not work on wet floors
-Work with one hand
-Always move slowly and deliberately
-Do not work alone
-Avoid distractions
/.Can you explain the operation of three-phase power? - Answer-Three-phase power is
electrical transmitted in three separate phases. An alternator that has three main
windings operating 120 degrees apart creates the three phases.
/.Do you know the function of neutral in electrical power? - Answer-A neutral is a
conductor that provides a common return path to the source for the conductors in a
system.
/.Can you explain the operation of grounded and ungrounded systems? - Answer-The
difference between the operation of a grounded system and an ungrounded system is
seen in their reactions to a ground fault. A ground fault occurs when one of the phases
becomes grounded.
If the ground fault occurs on one of the phases pf a grounded system, the circuit
protection devices will open the circuit because of the circuit because of the increased
current draw. This will cause the power to shut down.
If a ground fault occurs in one of the phases of an ungrounded system, the operation of
the circuit will not be interrupted.
/. Do you know the primary reason for grounding? - Answer-Equipment grounding limits
the voltage between all metal parts of the system and earth ground to a safe level,
thereby reducing the risk of shock.
/.Can you name the common standards associated with electrical control? - Answer-
National Electrical Code (NEC)
National Electrical Manufacturer's Association (NEMA)
International Electrotechnical Commission (IEC)
Underwriter's Laboratories (UL)
Occupational Safety and Health Administration (OSHA)
/.Can you state the ten basic rules of electrical safety? - Answer--Remove all metal
jewelry
-Be aware of conditions before working on a piece of equipment
-Do not rely on safety devices to protect you
-Never remove the grounding prong on an AC plug
-Always keep your tools and test equipment organized
-Do not work on wet floors
-Work with one hand
-Always move slowly and deliberately
-Do not work alone
-Avoid distractions
/.Can you explain the operation of three-phase power? - Answer-Three-phase power is
electrical transmitted in three separate phases. An alternator that has three main
windings operating 120 degrees apart creates the three phases.
/.Do you know the function of neutral in electrical power? - Answer-A neutral is a
conductor that provides a common return path to the source for the conductors in a
system.
/.Can you explain the operation of grounded and ungrounded systems? - Answer-The
difference between the operation of a grounded system and an ungrounded system is
seen in their reactions to a ground fault. A ground fault occurs when one of the phases
becomes grounded.
If the ground fault occurs on one of the phases pf a grounded system, the circuit
protection devices will open the circuit because of the circuit because of the increased
current draw. This will cause the power to shut down.
If a ground fault occurs in one of the phases of an ungrounded system, the operation of
the circuit will not be interrupted.
