The standard wooden types of graphite pencils are:
A. P, P-1, P-2, P-3
B. HB, H, H-2, H-3, H-4
C. PH, PH-1, PH-2, PH-3
D. PN, PN-1, PN-2, PN-3, PN-4
Answer: B
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Answer the following statement true (T) or false (F)
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a. the control circuit is operating fine b. the brushes are worn out c. the armature is grounded d. the battery terminals are loose
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