SACA C-202 EXAM QUESTIONS WITH SOLUTIONS
Do you know the primary reason for grounding? - -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? - -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? - --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? - -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? - -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? - -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 how different types of overcurrent protection work? - -A fusible disconnect
has a fuse for each phase and a manually operated switch that will disconnect all phases at
once.
Do you know the primary reason for grounding? - -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? - -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? - --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? - -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? - -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? - -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 how different types of overcurrent protection work? - -A fusible disconnect
has a fuse for each phase and a manually operated switch that will disconnect all phases at
once.
