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CSP3_LVL_1 EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -231 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: T/F

NFPA 70E 225.3 Circuit Breaker Testing states that "Circuit breakers that interrupt faults approaching their ratings shall be inspected and tested in accordance with the manufacturer's instructions."

Answer:

True Question 2: It is necessary to select a separate overload protective device for a 25-horsepower continuous-duty motor with 32 amperes nameplate current rating and a marked 1.15 service factor. Table 430.250 shows 34 amperes for such a motor. What is the maximum trip setting or ampere rating permitted for this overload protective device? Assume that the more permissive requirements of 430.32(C) are not warranted.

• 32 A
• 34 A
• 40 A
• 42.5 A

Answer:

• 40 A

Question 3: Match the correct Interrupting Range for each type of fuse.

-Class G fuse

• 200kA

B. 100KA

• 200kA or 300kA
• 10kA

Answer:

B. 100KA

Question 4: T/F

Supplementary OCPDs are described as OCPDs permitted for only specific branch-circuit applications, under limited conditions, per the specific reference in the NEC.

Answer:

False

Question 5: Feeder taps not over 10 feet long are covered by NEC section ____?

• 240.21(A)
• 240.21(B)(1)
• 240.21(C)(3)
• 240.21(C)(6)

Answer:

• 240.21(B)(1)

Question 6: T/F

A Type ICCB uses electronic sensor technology.

Answer:

True

Question 7: Generally, the overload element of a branch-circuit dual-element time-delay fuse will hold an overload that is five times greater than the ampere rating of the fuse for a minimum time of _____

• 2 seconds
• 5 seconds
• 10 seconds
• 20 seconds

Answer:

• 10 seconds

Question 8: Refer to the figures and follow the steps outlined in the short-circuit calculation procedure.Calculation of Fault Currents - Figure 10Calculation of Fault Currents - Figure 11 The short circuit at position 7 is ? than the short-circuit current at position 6

• higher
• lower

Answer:

• lower

Question 9: T/F

Instantaneous trip circuit breakers are also referred to as motor circuit protectors (MCPs) and are intended only for motor branch circuit short-circuit and ground-fault protection.

Answer:

True

Question 10: Match the correct Memory Word for each type of fuse......

Class T fuse

• rejection
• Tiny
• large
• junior

Answer:

• Tiny

Question 11: Match the correct Ampere Rating Range for each type of fuse.

-Class H fuse

• Fractional - 30A

B. 1-100A

C. 1/2 - 60A

D. 1/8 - 600A

Answer:

D. 1/8 - 600A

Question 12: T/F

Supplementary overcurrent protection is used for luminaires, appliances, and other equipment and can be used as a substitute where branch-circuit overcurrent devices are required.

Answer:

false Question 13: Under fault conditions, the greatest damage done to components by a fault current often occurs in the first half-cycle. What are the most common results of a fault current to electrical components?

• Explosive vaporization of the metal conductors and conductive parts
• Heating of components to high temperatures can cause deterioration of insulation
• Tremendous magnetic forces between conductors can crack insulators and loosen or rupture

bracing structures or equipment.

• both
• and

b.

• a., b.,

Answer:

• a., b., and c.