Chapter 7 · MCQ Read Mode

Transmission and Distribution Lines

An overhead transmission line relies primarily on which insulating medium between conductors?

The cross-arm on a transmission tower/pole primarily serves to:

An underground cable's metallic sheath primarily serves to:

PILC cable construction uses which type of conductor insulation?

Compared to PILC cables, modern XLPE cables generally offer:

Compared to underground cables, overhead transmission lines have:

A key advantage of underground cables over overhead lines is:

Locating and repairing a fault is generally:

Underground cabling is most commonly preferred in:

An overhead earth (shield) wire, as a component of an overhead line, primarily provides:

Raising the transmission voltage for a fixed power transfer primarily achieves:

The economic optimum transmission voltage balances:

Corona discharge around a conductor becomes more significant when:

A key characteristic of glass insulators is that they:

Polymer (composite) insulators are increasingly preferred for HV/EHV lines mainly because of their:

Voltage regulation of a transmission line is defined as:

Transmission efficiency is calculated as:

A short transmission line (up to ~80 km) is typically modeled using:

A medium transmission line (roughly 80–250 km) is commonly modeled using:

The choice of transmission voltage level is influenced primarily by:

Sag in an overhead conductor is defined as:

Increasing conductor tension, for a given span and weight, generally:

Ground clearance for an overhead line must be maintained at:

ACSR conductor construction consists of:

Compared to ACSR, AAAC (All Aluminium Alloy Conductor) offers:

A suspension insulator, compared to a pin insulator, is typically used for:

A strain (tension) insulator is used primarily at:

String efficiency of a suspension insulator string is always:

Jumpers at a strain/dead-end tower serve to:

A Stockbridge (vibration) damper is primarily used to:

Demand factor is defined as:

Load factor is defined as:

A higher load factor is generally desirable for a utility because it indicates:

Diversity factor is defined as:

A high diversity factor among a set of connected loads allows a utility to:

Plant capacity factor is defined as:

Industrial loads, compared to domestic loads, are generally characterized by:

Short-term load forecasting is primarily used for:

Medium/long-term load forecasting is primarily used for:

Correlation-based load forecasting methods relate load growth to factors such as:

In a radial primary distribution system, a fault upstream of the substation feeder typically:

A ring main distribution system improves reliability over a radial system because: whole ring

An interconnected network distribution system, compared to radial and ring systems, generally offers:

A three-phase, four-wire secondary distribution system is used when: same network

A single-phase, two-wire secondary distribution system is typically used for:

Conductor selection in secondary distribution considers all of the following EXCEPT:

A stay (guy) wire on a distribution pole is primarily used to:

A strain insulator is typically fitted into a stay wire to:

Support pole selection for secondary distribution (wood, concrete, or steel) depends on:

Which primary distribution configuration typically involves the highest complexity and cost?

Voltage drop along a distribution feeder is primarily caused by:

A tap-changing transformer regulates distribution voltage by:

Shunt capacitor banks help improve distribution voltage regulation mainly by:

Most practical industrial and commercial loads exhibit a power factor that is:

A low (lagging) power factor at a given real power demand results in:

Power factor correction is achieved by:

The most common and economical method of power factor correction is:

A synchronous condenser used for power factor correction is essentially:

Compared to static capacitor banks and synchronous condensers, SVC/STATCOM devices offer:

A key benefit of power factor correction, besides reduced losses, is: