1.
When operating the lathe you should wear eye protection because
Correct Answer
C. Sharp, hot metal chips can fly off
Explanation
When operating a lathe, wearing eye protection is necessary because sharp, hot metal chips can fly off. These chips can pose a significant risk to the eyes, causing injury or damage. Eye protection, such as safety glasses or goggles, creates a barrier between the eyes and the flying debris, reducing the chances of eye-related accidents. It is important to prioritize safety in such situations to prevent any potential harm.
2.
Snugly fitting clothes is best because
Correct Answer
B. Loose fitting clothes may get caught in rotating work
Explanation
Loose fitting clothes may get caught in rotating work, which can be dangerous and cause accidents. Snugly fitting clothes, on the other hand, reduce the risk of getting caught in machinery or equipment, ensuring safety in the workplace. Additionally, snugly fitting clothes give a neater appearance, and they allow for better mobility and the ability to work efficiently.
3.
The preferred type of shoes to be worn are
Correct Answer
C. Leather boots
Explanation
Leather boots are the preferred type of shoes to be worn because they offer durability, support, and protection. They are suitable for various occasions and can be paired with different outfits. Leather boots also provide insulation and are resistant to water, making them ideal for different weather conditions. Additionally, they are stylish and versatile, allowing individuals to express their personal style while ensuring comfort and functionality.
4.
The work should ___________ be clamp securely in the chuck or between centres before starting the lathe.
Correct Answer
A. Always
Explanation
When operating a lathe, it is important to ensure that the workpiece is securely clamped in the chuck or between centers. This is necessary to prevent the workpiece from coming loose or moving during the lathe operation, which could lead to accidents or damage to the workpiece. Therefore, the work should always be clamp securely in the chuck or between centers before starting the lathe.
5.
The chuck key may ______________ be left in the chuck.
Correct Answer
D. Never
Explanation
The chuck key should never be left in the chuck. This is because leaving the chuck key in the chuck can be dangerous. It can cause the chuck to rotate unexpectedly, leading to accidents or injuries. It is important to remove the chuck key after use and store it in a safe place to prevent any mishaps.
6.
Do not remove the swarf from the rotating work because
Correct Answer
A. To do otherwise, the swarf may cut
Explanation
If the swarf is removed from the rotating work, there is a possibility that it may cut something else. This suggests that the swarf itself could be sharp or have sharp edges that can cause injury or damage if not handled properly. Therefore, it is important to leave the swarf on the rotating work to prevent any potential cutting hazards.
7.
When filing especially on the lathe, files should always be used with the handles fitted on, otherwise they may
Correct Answer
B. Pierce your hand with their tangs
Explanation
When filing on the lathe, files should always be used with the handles fitted on because if the handles are not used, there is a risk that the tangs (sharp pointed ends) of the files may pierce your hand. The handles provide a secure grip and prevent the files from slipping, reducing the chances of injury. Therefore, it is important to use the handles to ensure safety while filing on the lathe.
8.
Jewelry should be removed because
Correct Answer
B. It may get tangled in the rotating work
Explanation
Jewelry should be removed because it may get tangled in the rotating work. This can be dangerous as it can cause accidents or injuries to the person wearing the jewelry or those around them. Removing jewelry reduces the risk of entanglement and ensures a safer working environment.
9.
When filing on the lathe it is best to hold the file
Correct Answer
A. In your left hand
Explanation
When filing on the lathe, it is best to hold the file in your left hand. This is because holding the file in the left hand allows for better control and precision while filing. Additionally, holding the file in the left hand keeps the right hand free to operate the lathe controls and make adjustments as needed.
10.
It is best to start the lathe at
Correct Answer
D. Slow speed and increase gradually
Explanation
Starting the lathe at a slow speed and gradually increasing it is the best approach because it allows for better control and reduces the risk of accidents. Starting at a fast speed could cause the workpiece to become unstable or cause the tool to catch, leading to damage or injury. Similarly, starting at a fast speed and decreasing gradually may still pose risks as sudden changes in speed can be unpredictable. Starting at a slow speed and increasing gradually allows the operator to observe and adjust as necessary, ensuring a safer and more efficient operation.