IBEW Reading Comprehension Analysis 3

Question 1

A technical manual states: 'Three-phase power is preferred over single-phase for motors above 1 HP because it provides smoother power delivery and greater efficiency.' A facility needs a 5 HP motor. What does the manual suggest?

Accepted Answer

A three-phase motor because it is more efficient for that power level

Answer

The manual states three-phase is preferred above 1 HP, and 5 HP exceeds that threshold.

Question 2

A regulation reads: 'Grounding electrode conductors shall be installed in one continuous length without splices or joints, except where splices are made by irreversible compression-type connectors or exothermic welding.' A worker wants to splice a grounding electrode conductor using wire nuts. Is this permitted?

Accepted Answer

No, only irreversible compression connectors or exothermic welding are allowed

Answer

Wire nuts are not irreversible compression connectors, so the regulation prohibits their use for this splice.

Question 3

A passage reads: 'The demand factor is the ratio of the maximum demand of a system to its connected load. A demand factor less than 1 indicates that not all connected equipment operates simultaneously.' A building has 200 A of connected load but a measured maximum demand of 140 A. What is its demand factor?

Accepted Answer

0.70

Answer

Demand factor = maximum demand ÷ connected load = 140 ÷ 200 = 0.70.

Question 4

A safety bulletin states: 'Arc flash hazard labels must be placed on all electrical equipment that requires examination, adjustment, servicing, or maintenance while energized.' A technician is asked to read a meter on an energized panel. Does the panel require an arc flash label?

Accepted Answer

Yes, because examination of energized equipment requires the label

Answer

The bulletin explicitly includes examination alongside maintenance, so reading a meter qualifies.

Question 5

A passage explains: 'Voltage drop in a circuit is proportional to the resistance of the conductors and the current flowing through them. Using larger gauge wire reduces resistance and therefore reduces voltage drop.' A long run is experiencing excessive voltage drop. What does the passage suggest?

Accepted Answer

Use a larger gauge wire to reduce resistance

Answer

The passage directly states that larger gauge wire reduces resistance and therefore voltage drop.

IBEW - Aptitude Test Practice Test

IBEW - Aptitude Test Practice Test

IBEW Reading Comprehension Analysis 3