4.1 Identify the lathe component in FIGURE 4.1 below - NSC Mechanical Technology Fitting and Machining - Question 4 - 2022 - Paper 1
Question 4
4.1 Identify the lathe component in FIGURE 4.1 below.
A. Dead centre
B. Revolving centre
C. Centre drill
D. Taper drill bit
4.2 What is the purpose of the screw-cu... show full transcript
Worked Solution & Example Answer:4.1 Identify the lathe component in FIGURE 4.1 below - NSC Mechanical Technology Fitting and Machining - Question 4 - 2022 - Paper 1
Step 1
Identify the lathe component in FIGURE 4.1 below.
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Answer
The lathe component shown in FIGURE 4.1 is identified as a Dead centre (A). A dead centre is a tool used in lathe work to support the workpiece while it turns.
Step 2
What is the purpose of the screw-cutting dial gauge found on a lathe machine?
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Answer
The purpose of the screw-cutting dial gauge is to assist the operator by allowing an accurate engagement of the lead screw operation (A). This enhances precision in cutting threads.
Step 3
How many axes are displayed on a digital read-out (DRO) system on a lathe machine?
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Answer
A digital readout (DRO) system typically displays 2 axes (A), which correspond to the longitudinal and cross movements of the carriage.
Step 4
Which codes does a CNC (computer numerical control) milling machine use for machine tool moving?
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Answer
CNC milling machines primarily utilize G-codes (C) to command various actions and movements of the machine.
Step 5
What is the size of the carbide ball in a Brinell hardness tester when used for testing material?
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Answer
The size of the carbide ball used in a Brinell hardness tester is typically 10 mm (C). This ball size is standard for hardness testing.
Step 6
Identify the type of precision measuring tool in FIGURE 4.6 below.
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Answer
The precision measuring tool shown in FIGURE 4.6 is an Outside micrometer (C), which is used for measuring external dimensions accurately.
Step 7
What type of stress is caused in a cable of a hoisting crane when lifting a load?
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Answer
When lifting a load, the type of stress experienced in the cable is referred to as Tensile stress (A) as it pulls on the material.
Step 8
Which ONE of the following factors determines the value of the safety factor?
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The value of the safety factor is determined by The consequences of failure (A), as this reflects the risks involved.
Step 9
Which ONE of the following is an example of PVC?
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An example of PVC is Cling wrap (C), which is commonly used for food storage.
Step 10
Which ONE of the following is an advantage of nylon?
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Answer
One advantage of nylon is that it can quickly turn to liquid (C) when subjected to high temperatures, allowing for flexibility in manufacturing.
Step 11
Identify A in FIGURE 4.11 below.
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Answer
In FIGURE 4.11, A refers to the Root (A) of the screw thread which is the base of the screw's profile.
Step 12
Which ONE of the following is an advantage of a multiple-start screw thread?
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Answer
An advantage of a multiple-start screw thread is that it Produces faster movement (C), allowing for quicker adjustments.
Step 13
A block and tackle is also known as a ...
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Answer
A block and tackle system is also known as a pulley system (A). It is used for lifting and moving heavy loads.
Step 14
Identify the symbol of the hydraulic component in FIGURE 4.14 below.
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Answer
The hydraulic component shown in FIGURE 4.14 is identified as a Pressure gauge (A), used to measure the pressure within the system.
