Multiple-choice questions on June 22, 2017; replies will earn 0–6 points (no scoring for replies sent more than 1 day after posting. Thank you for replying)
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Single-choice question (zero points for incorrect answers): The amount of lubricating oil in a pump is generally controlled at the ＿＿＿＿ level indicated by the liquid level gauge in the bearing box. (1) 1/2–2/3 (2) <1/2 (3) >2/3 (4) 1/3–2/3 Answer: (1) No score is given for replies within 1 day of posting; thanks for your reply
(1) 1/2～2/3
(1) 1/2～2/3
(1) 1/2～2/3