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 Long tapers can be cut - 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 Long tapers can be cut - NSC Mechanical Technology Fitting and Machining - Question 4 - 2020 - Paper 1
Step 1
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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Answer
The correct answer is C: Tapers with large angles can be cut. The compound slide method allows for more versatile taper turning capabilities.
Step 2
4.2 Identify the milling process shown in FIGURE 4.2 below.
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Answer
The correct answer is B: Cut milling. This process typically refers to the methodology in the illustration.
Step 3
4.3 Which milling process would be the easiest to cut a hexagon bolt head if the required cutting tool is taken from...
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Answer
The correct answer is C: Angular indexing. This method effectively facilitates the machining of hexagonal forms.
Step 4
4.4 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. This device utilizes a steel ball for hardness testing.
Step 5
4.5 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. This refers to programming based on a universal reference point.
Step 6
4.6 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. It is crucial for ensuring accurate thread cutting alignment.
Step 7
4.7 What is the measure unit for strain?
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Answer
The correct answer is C: No unit. Strain is a dimensionless quantity, defined as the ratio of deformation to the original length.
Step 8
4.8 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. It indicates how much stronger a system is than it needs to be for an intended load.
Step 9
4.9 Which ONE of the following materials can be reheated and deformed?
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Answer
The correct answer is D: Nylon. It is a thermoplastic that can be reshaped when heated.
Step 10
4.10 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. This enhances the contact force, thereby increasing friction.
Step 11
4.11 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. Lead is the distance a nut moves along the screw in one full rotation.
Step 12
4.12 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
4.13 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. Chain drives are generally more versatile in this aspect.
Step 14
4.14 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 B: This symbol unequivocally represents an electrical motor in hydraulic schematics.
