4.1 Which ONE of the following statements is an advantage of the compound slide method over the taper-turning attachment method for taper turning on a centre lathe?
A - NSC Mechanical Technology Fitting and Machining - Question 4 - 2020 - Paper 1
Question 4
4.1 Which ONE of the following statements is an advantage of the compound slide method over the taper-turning attachment method for taper turning on a centre lathe?
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Worked Solution & Example Answer:4.1 Which ONE of the following statements is an advantage of the compound slide method over the taper-turning attachment method for taper turning on a centre lathe?
A - NSC Mechanical Technology Fitting and Machining - Question 4 - 2020 - Paper 1
Step 1
Which ONE of the following statements is an advantage of the compound slide method over the taper-turning attachment method for taper turning on a centre lathe?
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Answer
The correct answer is D. Good finishing is obtained. This method typically provides better surface finishes due to the precision and control involved in the compound slide technique.
Step 2
Identify the milling process shown in FIGURE 4.2 below.
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Answer
The correct answer is A. Gang milling, as it involves simultaneous cutting on multiple edges.
Step 3
Which milling process would be the easiest to cut a hexagon bolt head if the resources were available?
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Answer
The correct answer is D. Differential indexing, which allows for precise angular adjustments necessary for cutting complex shapes like a hexagon.
Step 4
Which hardness tester uses a steel ball to determine the hardness of steel?
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Answer
The correct answer is B. Brinnell hardness tester, which uses a steel ball to measure the indentation left on the material.
Step 5
What is meant by the term absolute programming on a three-axis digital read-out system?
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Answer
The correct answer is C. a common point, indicating that absolute programming refers to a fixed point of reference that all subsequent movements are based upon.
Step 6
Which equipment is used on the lathe to set the screw thread cutting tool at centre height, square to the axis of the work piece?
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Answer
The correct answer is B. Centre gauge which ensures the tool is properly aligned with the workpiece.
Step 7
What is the measure unit for strain?
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Answer
The correct answer is B. Pascal, which is the standard SI unit of measure for strain in engineering contexts.
Step 8
Which ONE of the following terms is described as the load-carrying capacity of a system beyond the expected or actual loads?
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Answer
The correct answer is C. Safety factor, which is used to describe how much stronger a system is than it needs to be for an intended load.
Step 9
Which ONE of the following materials can be reheated and deformed?
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Answer
The correct answer is D. Nylon, as it can undergo plastic deformation upon reheating.
Step 10
What can be done to increase the frictional force between two horizontal surfaces that make contact?
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Answer
The correct answer is A. Increase the weight of the object, as greater weight increases the normal force, which in turn increases friction.
Step 11
Which ONE of the following screw-thread terms is defined by the words, 'the axial distance that a nut will move through one revolution'?
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Answer
The correct answer is C. Lead. It defines the linear distance a nut moves with one full rotation of a screw.
Step 12
Which ONE of the following defines the helix angle of a screw thread?
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Answer
The correct answer is C. The angle that the centre line makes with a line perpendicular (90°) to the axis of the screw thread.
Step 13
Which ONE of the following statements is an advantage of a chain drive over a gear drive?
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Answer
The correct answer is B. Drive can take place over a longer distance, making chain drives more versatile in applications.
Step 14
Which ONE of the following hydraulic symbols is used to indicate an electrical motor in a hydraulic flow diagram?
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Answer
The correct answer is C. The standard symbol used for electric motors in hydraulic diagrams is typically a circle with an 'M' inside.
