1) Which answer is INCORRECT? The basic governing principles regarding the complexities of power distribution systems ar
Posted: Fri Jul 01, 2022 6:00 am
1) Which answer is INCORRECT?
The basic governing principles regarding the complexities ofpower distribution systems are valid for all cases:
Select one:
A. Ensuring safety of operating personnel and plant assets
B. Ensuring reliable power supply (continuity of power)
C. Ensuring adequate quality of power
D. Ensuring that a load does not interfere with or causeproblems to other consumers internal or external to the plant
E. Ensuring that over time is worked, in a manner fairlydistributed amongst all electrical personnel.
2) Most systems use the _______ system at the source, to givethem the flexibility to feed both three phase and single-phaseloads.
Select one:
A. Delta
B. Star
C. Ward-Leonard
D. Zig-zag
3) Planning a power distribution system has to START with:
Select one:
A. Assessing the overall energy requirement and power demand
B. Considering seasonal requirements
C. Considering economic indices
D. Considering rating of individual equipment
4) Key assets (such as plant incoming substations), if locatedcorrectly, have benefits that accrue. These could be:
Select one:
A. Better lighting conditions;
B. Improved HAZOP team selection;
C. Shorter cable routes for internal power connections,particularly for major loads,
D. Avoiding excessive voltage drop (as a result of shorterpaths)
E. A and B
F. C and D
5) While equipment sizing is the first step in finalizing therequired distribution equipment, there are other factors which playan important role too, such as:
Select one:
A. Cost factor
B. Market reputation of the vendors who can supply suchequipment
C. Experience of other users (internal/external)
D. Conformity to standards (national/international)
E. Standardisation and variety reduction
F. All of the above
6) Equipment subjected to high fault currents experience severe_______ and must be designed to withstand these effects.
Select one:
A. Speed
B. Thermal and mechanical stresses
C. Acceleration and braking
D. Cooling
7) Fault calculations are useful to study cases of:
Select one:
A. Switchgear being overstressed
B. Underrated cables
C. Switch transformers, lines or cables out to control faultlevel
D. Panel sizes required
E. A, B and C
8) The selection and setting of ________ devices is important inorder to ensure the basic requirements of sensitivity, selectivity,stability and speed.
Select one:
A. Speed sensitivity
B. Protective
C. Damping
D. Capacitive
9) Load flow studies are usually important for mesh networks andhelp to arrive at the load current (active and reactive) indifferent branches.
Select one:
True
False
10) The knowledge of current flowing in a system does not play amajor role in determining the sizes of cables, specifying theinterruption capacity of circuit breakers and fuses, etc.
Select one:
True
False
The basic governing principles regarding the complexities ofpower distribution systems are valid for all cases:
Select one:
A. Ensuring safety of operating personnel and plant assets
B. Ensuring reliable power supply (continuity of power)
C. Ensuring adequate quality of power
D. Ensuring that a load does not interfere with or causeproblems to other consumers internal or external to the plant
E. Ensuring that over time is worked, in a manner fairlydistributed amongst all electrical personnel.
2) Most systems use the _______ system at the source, to givethem the flexibility to feed both three phase and single-phaseloads.
Select one:
A. Delta
B. Star
C. Ward-Leonard
D. Zig-zag
3) Planning a power distribution system has to START with:
Select one:
A. Assessing the overall energy requirement and power demand
B. Considering seasonal requirements
C. Considering economic indices
D. Considering rating of individual equipment
4) Key assets (such as plant incoming substations), if locatedcorrectly, have benefits that accrue. These could be:
Select one:
A. Better lighting conditions;
B. Improved HAZOP team selection;
C. Shorter cable routes for internal power connections,particularly for major loads,
D. Avoiding excessive voltage drop (as a result of shorterpaths)
E. A and B
F. C and D
5) While equipment sizing is the first step in finalizing therequired distribution equipment, there are other factors which playan important role too, such as:
Select one:
A. Cost factor
B. Market reputation of the vendors who can supply suchequipment
C. Experience of other users (internal/external)
D. Conformity to standards (national/international)
E. Standardisation and variety reduction
F. All of the above
6) Equipment subjected to high fault currents experience severe_______ and must be designed to withstand these effects.
Select one:
A. Speed
B. Thermal and mechanical stresses
C. Acceleration and braking
D. Cooling
7) Fault calculations are useful to study cases of:
Select one:
A. Switchgear being overstressed
B. Underrated cables
C. Switch transformers, lines or cables out to control faultlevel
D. Panel sizes required
E. A, B and C
8) The selection and setting of ________ devices is important inorder to ensure the basic requirements of sensitivity, selectivity,stability and speed.
Select one:
A. Speed sensitivity
B. Protective
C. Damping
D. Capacitive
9) Load flow studies are usually important for mesh networks andhelp to arrive at the load current (active and reactive) indifferent branches.
Select one:
True
False
10) The knowledge of current flowing in a system does not play amajor role in determining the sizes of cables, specifying theinterruption capacity of circuit breakers and fuses, etc.
Select one:
True
False