Fronch
OCS 03-15 (IW)
Hey, all. I'm taking the ASTB in a few weeks, and I've been studying for a few days now. The only sections I'm concerned about are the Aviation/Nautical Info and the Mechanics sections. For the ANIT, I've made up over 100 flash cards, and I think I'll be fine there. For the Mechanics section, it seems like most of it is basic high school science or common sense, but there are a couple questions I've encountered that trip me up.
Here's one I found on a practice exam, and I have a question about it. I've attached the picture from the problem, which states:
Which one of the following statements is true?
A. If the nut is held stationary and the head turned clockwise, the bolt will move down.
B. If the head of the bolt is held stationary and the nut is turned clockwise, the nut will move down.
C. If the head of the bolt is held stationary and the nut is turned clockwise, the nut will move up.
Here's how I thought about it: Holding the bolt-head stationary and turning the nut clockwise is equivalent to holding the nut stationary and turning the bolt-head counterclockwise. Since counterclockwise is "Lefty Loosey," the bolt-head and nut will move apart, and the nut will move down. However, the listed answer is "C", which I don't really understand.
Is the angle of the threads (tilted down and to the right) in the picture relevant, or is there something wrong with my reasoning? Thanks in advance!
Here's one I found on a practice exam, and I have a question about it. I've attached the picture from the problem, which states:
Which one of the following statements is true?
A. If the nut is held stationary and the head turned clockwise, the bolt will move down.
B. If the head of the bolt is held stationary and the nut is turned clockwise, the nut will move down.
C. If the head of the bolt is held stationary and the nut is turned clockwise, the nut will move up.
Here's how I thought about it: Holding the bolt-head stationary and turning the nut clockwise is equivalent to holding the nut stationary and turning the bolt-head counterclockwise. Since counterclockwise is "Lefty Loosey," the bolt-head and nut will move apart, and the nut will move down. However, the listed answer is "C", which I don't really understand.
Is the angle of the threads (tilted down and to the right) in the picture relevant, or is there something wrong with my reasoning? Thanks in advance!
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