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on February 12, 2018

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Lathe Tools MCQ

1. Which one of the following tool angle is provided to avoid rubbing of the body of the tool with the workpiece? (a) Rake angle (b) Helix angle (c) Clearance angle (d) None of the above 2. The negative rake angle is generally provided on the tool made of (a) High speed steel (b) Tool steel (c) Tungsten carbide (d) High carbon steel 3. Which one of the following is used only for finishing and maintaining correct form of thread ? (a) Tap (b) Threading tool (c) Threading chaser (d) Tipped tool 4. The chip breaker on a lathe tool is essential when (a) Turning soft material (b) Turning ductile materials and to break the chips (c) Turning cast iron (d) Turning hardened materials 5. A tool, which is used to enlarge a previously drilled hole is known as (a) Facing tool (b) Turning tool (c) Form tool (d) Boring tool 6. What effective change will occur to the tool geometry if the cutting tool is set below the centre heigh...

Lathe Accessories MCQ

1. Which one of the following is used to hold cylindrical rough casting for turning? (a) Three-jaw chuck (b) Four-jaw chuck (c) Collet chuck (d) Magnetic chuck 2. Which one of the following centres is suitable while cutting taper by set over method? (a) Plain centre (b) Half centre (c) Ball centre (d) Revolving centre 3. Which one of the following is used to hold the workpiece for machining diameter concentric to its hole / bore? (a) Face plate (b) Mandrel (c) Three-jaw chuck (d) Four-jaw chuck 4. Which among the following centres is suitable when workpiece held between centres is to be turned at high speed? (a) Ball centre (b) Half centre (c) Pipe centre (d) Revolving centre 5. The included angle of live centre nose is (a) 30° (b)45° (c) 60° (d)90° 6. A lathe half centre is used (a) To support the workpiece always (b) To turn long workpiece (c) Because it is easy to lubricate the workpiece (d) To face the workpiec...

Lathe Operations MCQ

1. Which one of the following is the correct position of threading tool to cut V-thread? (a) Exactly at centre height of the workpiece with tool axis perpendicular to the workpiece axis (b) Exactly at centre height of the workpiece with tool axis at 60° to the workpiece axis (c) Exactly at centre height of the workpiece with tool axis at 45° to the workpiece axis (d) Exactly at centre height of the workpiece with tool axis at 30° to the workpiece axis 2. Which among the following statements is suitable to get better finish by turning ? (a) Increase the speed and feed (b) Reduce the speed and feed (c) Increase the speed and reduce the feed (d) Increase the feed and reduce the speed 3. For plain turning a 60 mm diameter workpiece using HSS tool with recommended cutting speed of 30 metre / min., the rpm should be (a) 80 rpm (b)159 rpm (c) 192 rpm (d) 318 rpm 4. Which among the following factors governs the selection of feed when turning a workpiece ? (...

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