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Question 1
A gear and bearing puller is used to pull which items?
Correct Answer:
Gears, bearings, pinions, sheaves, pulleys, and wheels
Explanation:
The gear and bearing puller is built to remove components that are press-fitted onto shafts or housed tightly, by applying axial force evenly around the part. It grips the outer surfaces of items like gears, bearings, pinions, sheaves, pulleys, and wheels and pulls them off without marring the parts or the shaft. This makes it the best choice for taking off those components because they commonly require a controlled pulling action to release them from interference fits. Nuts and bolts are fasteners removed with wrenches, shafts aren’t typically the target of a puller, and pins are taken out with pin extractors or similar tools. So, the gear and bearing puller excels at removing gears, bearings, pinions, sheaves, pulleys, and wheels.
Question 2
What is the primary function of a hydraulic accumulator in a shipboard system?
Correct Answer:
It stores hydraulic energy as pressurized fluid to maintain pressure.
Explanation:
The main idea here is storing energy to keep pressure steady and respond quickly. A hydraulic accumulator stores hydraulic energy as pressurized fluid by compressing a gas (often nitrogen) on the other side of a piston, bladder, or diaphragm. When the system demands more fluid flow or a surge in pressure—such as a rapid steering input or actuator move—the stored fluid is released, helping to maintain line pressure, smooth out pressure fluctuations, and reduce the pump’s on/off cycling. This readiness is crucial on ships where reliable, immediate hydraulic power is needed for steering, deck machinery, and other systems. This isn’t about cooling fluid, measuring flow, or sensing temperature. Those functions belong to coolers, flow meters, and temperature sensors, respectively.
Question 3
What discoloration may indicate finely divided rust particles when evaluating an oil sample for water presence?
Correct Answer:
Muddy, reddish brown
Explanation:
When oil is contaminated with water, iron parts in the machine can begin to rust. Finely divided rust particles that form are iron oxide, and when they stay suspended in oil they scatter light in a way that gives the oil a muddy, reddish-brown hue. That color change is a sign that water is present and corrosion is occurring, which is why muddy, reddish-brown discoloration is the best indicator of finely divided rust particles in an oil sample. Other colors don’t point to rust: bright yellow can be varnish or certain oxidation by‑products, clear and colorless means the oil is clean, and blue-green suggests copper or alloy corrosion rather than iron oxide rust.
Question 4
What is the approximate rate of temperature rise per hour for the LO purifier heater when heating the Main Reduction Gear sump oil from 40°F to 90°F in one hour?
Correct Answer:
50°F per hour
Explanation:
Rate of temperature rise is simply the change in temperature divided by the time allowed. Here, the oil needs to go from 40°F to 90°F, which is a 50°F increase. Over one hour, that works out to 50°F per hour, assuming the heater delivers a steady heat input and heat losses are small. The other numbers would only fit if the final temperature, initial temperature, or the time were different—for example, a rate of 60°F per hour would reach 100°F in an hour, while 25°F per hour would only reach 65°F, and 45°F per hour would reach 85°F.
Question 5
What is the gear and bearing puller used to pull?
Correct Answer:
Gear and bearing puller
Explanation:
The gear and bearing puller is designed to remove both gears and bearings from a shaft. It uses arms that grip behind the gear teeth or around the outer race of a bearing, and a central screw that you tighten to apply an axial pulling force. As the screw turns, the force is transmitted through the arms to pull the gear or bearing straight off the shaft without twisting or marring the shaft shoulder. This dual capability—removing gears and removing bearings—is why this tool is the right fit. Other pullers target different tasks: a universal gear puller is adaptable for various gears but not specifically optimized for bearings; a push and pull set handles pressing in or pulling out items but isn’t the go-to for extracting gears or bearings from shafts; a cotter pin puller is for removing cotter pins, not gears or bearings.
Question 1
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About this Exam

Prepare with the Naval Maintenance and Mechanical Tools – Technical Manuals, Fasteners, and System Operations Practice Test practice quiz. This question bank includes 10 questions covering gear, bearing, puller, pull, and hydraulic. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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Naval Maintenance and Mechanical Tools – Technical Manuals, Fasteners, and System Operations Practice Test

This practice set contains 10 questions from the matching question bank and focuses on gear, bearing, puller, pull, and hydraulic. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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