1.
The purpose of turning the drill on before attempting to drill a hole is to ________.
Correct Answer
B. See if the drill bit is running true
Explanation
The purpose of turning the drill on before attempting to drill a hole is to see if the drill bit is running true. By turning on the drill, you can observe if the drill bit is spinning smoothly and without wobbling. This ensures that the drill bit is properly aligned and balanced, which is important for accurate and efficient drilling. It also helps to prevent any potential damage or accidents that could occur if the drill bit is not running true.
2.
The purpose of moving the drill and bit up and down often when drilling deep hole is to ________.
Correct Answer
D. Reduce overheating the drill bit
Explanation
Moving the drill and bit up and down often when drilling a deep hole helps to reduce overheating the drill bit. This is because the up and down motion allows for better cooling and lubrication of the drill bit, preventing it from getting too hot and potentially becoming damaged. Additionally, the movement helps to remove debris and chips from the hole, further reducing the chances of overheating.
3.
If a large capacity portable drill bit hangs during the drilling operation what will likely happen?
Correct Answer
B. The drill will twist in the operators hand causing a sprain wrist or bruised fingers.
Explanation
If a large capacity portable drill bit hangs during the drilling operation, the drill will twist in the operator's hand causing a sprained wrist or bruised fingers. This is because the drill's torque will cause it to forcefully rotate in the opposite direction when the bit gets stuck, leading to a sudden and unexpected movement that can injure the operator's hand.
4.
What kind of pressure should be applied to a drill during the drilling operation?
Correct Answer
C. Moderate, even
Explanation
During a drilling operation, it is important to apply moderate, even pressure to the drill. Applying light pressure may result in the drill not effectively cutting through the material, while heavy pressure can cause the drill to become stuck or break. By applying moderate pressure, the drill can efficiently penetrate the material without causing any damage or hindrance to the drilling process. Additionally, maintaining an even pressure ensures a consistent and smooth drilling operation.
5.
What type of drill speed is needed for wood drilling operations?
Correct Answer
D. High
Explanation
For wood drilling operations, a high drill speed is needed. This is because wood is a relatively soft material and can be drilled quickly without causing damage or splintering. Using a high drill speed allows for efficient drilling and reduces the chances of the drill bit getting stuck or overheating. Additionally, a high drill speed helps to achieve clean and smooth holes in wood.
6.
What type of drill speed is needed for most metal drilling operations?
Correct Answer
A. Low
Explanation
For most metal drilling operations, a low drill speed is needed. This is because metal is a hard material and drilling at high speeds can cause the drill bit to overheat and wear out quickly. By using a low drill speed, the operator can maintain control and prevent the drill bit from getting damaged or breaking. Additionally, a low drill speed allows for better accuracy and precision when drilling through metal surfaces.
7.
The purpose of a pilot hole when drilling is to ________.
Correct Answer
B. Guide the final drilling operation to achieve a more accurately placed hole
Explanation
A pilot hole is a small-diameter hole drilled before the final drilling operation. It serves as a guide for the final drilling operation, ensuring that the hole is accurately placed. By creating a pilot hole, the drill bit has a starting point and a path to follow, resulting in a more precise and accurately positioned final hole. The pilot hole helps to prevent the drill bit from wandering or deviating from the desired drilling location, thus achieving a more accurately placed hole.
8.
To prevent seizing when drilling the operator should ________.
Correct Answer
B. Lubricate the drill bit
Explanation
To prevent seizing when drilling, it is important to lubricate the drill bit. This helps to reduce friction between the bit and the material being drilled, preventing overheating and seizing. Lubrication also helps to prolong the life of the drill bit and ensure smooth drilling operation.