Knowing how to identify and use key words in electrical exam questions to locate code article answers, using the table of contents and the index, is the most effective way to prepare to pass your electrical exam.
Can you identify and use the key words in the following question with ease? 
Question:
A branch circuit supplying a 7.5 Hp. 230 volt single-phase A.C. hermetic refrigerant motor compressor would require an inverse time breaker rating of _________.
Solution:
70 amps.
Key words: Hermetic refrigerant motor compressor. Using these key words with the index of NFPA 70 locate air conditioning and refrigerating equipment, general, individual motor compressor. Refer to article 440.22(A). Multiply the full load current of the motor by 175%.
= 40 amps x 175%
= 70 amps
How do the key words hermetic refrigerant motor compressor relate to air conditioning and refrigerating equipment?
Where can the motor full load current be found?
Article 440.22(A) provides two percentages, 175% and 225%. Why was 175% used to calculate the answer instead of 225%?
Knowing the answer to these questions will prepare you to effectively identify and use key words in questions and pass your electrical exam.
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