Turner theory sem 3 jan 2017 questions
Which of the material generally used to manufacture twist drills?
a. HSS b. Carbide steel c. Diamond d. Cast steel
Which one of the following tool angle is provided to avoid rubbing of the body of the
with the work piece?
a Rake angle b. Helix angle c. Clearance angle d. None ot these
HSS is tempered at:-
a. 220°C to 230°C b. 230°C to 270°C c. 280°C to 400°C d. 550°C to 600°C
The commonly used proportions of alloying elements in HSS are-
a. 18% tungsten, 4% chromium and 1% vanadium
b. 18% chromium, 4% tungsten and 1% vanadium
c. 18% vanadium, 4% chromium and 1% tungsten
d. 18% cobalt, 4% chromium and 1% vanadium
Which one of the following tests is carried out after overhauling and reconditioning
machines?
a. Periodic acceptance test b. Geometrical test only
c .Performance test only d. None of these
The chip breaker on a lathe tool is essential when turning :-
a. Soft material b. Ductile material
c. Cast iron d. Hardened materials
Which one of the following is used to clamp the job in relation to the tool in mass production?
a jjo b. Fixture c. Housing d. Gauges
The tool made of cemented combide wear out faster at-
a. Slow speed b. Medium speed c. Fast speeds d. Very fast speeds
Which one of the following is NOT the property of a good lubricant?
a. No change in viscosity due to variation in temperature
b. Reduces friction between machine parts
c. Takes up the surface pressure between sliding parts
d. Becomes thicker after prolonged use
The permissible deviation for leveling of machine is>
a. 0.03/100 mm b. 0.03 / 200 mm c. 0.03 / 300 mm d. 0.03 / 400 mm
Which one of the following factors will NOT influence the selection of the cutting speed?
a. Diameter of the work piece b. Work piece material
c. Tool material d. Operation to be performed
The hardening temperature of HSS tool
a. 1250°C b. 950°C c. 850°C d. 750°C
Which among the following factors governs the selection of feed when turning a work piece?
a. Tool geometry b. Surface finish required
c. Types of coolant required d. All of these
If the pitch of a led screw is 6 mm and the pitch of the thread to be cut is 1.25 mm. then the
change of gears required are:-
a. Driving gears 40 & 120and Driven gears 50 & 20
b. Driving gears 50 & 20 and Driven gears 40 & 120
c. Driving gears 50 & 120 and Driven gears 40 & 20
d. Driving gears 40 & 20 and Driven gears 50 & 120
Which among the following statements is NOT correct:-
a. Jig is used for drilling operation b. Jig is used for planning operation
c. Jig is used for indexing operation d. Jig is used for boring operation
A sine bar is a precision instrument used to check the angular accuracy of tapered
components. Four or five equally spaced holes are drilled on the body of this sine
purpose of these holes is to:-
a. Handle the sine bar with ease b. Reduce the weight of the sine bar
c. Prevent distortion of the top surface d. Add appearance to the sine bar
A fixed steady rest is used to:-
a. Support the tool rigidly to avoid chatter during operation.
b. Support long shafts that are being threaded for their full length.
c. Support workpieces during facing large diameter work pieces with short length.
d. Support long workpieces held in chuck, to perform operations at the overhanging end.
Rake angle is not provided on a form tool used to produce taper on a work piece. The reason
for this is-
a. To reduce grinding time of the tool
b. To reduce wastage of tool material
c. Taper angle is not affected by re-sharpening
d. For the tool to have large wedge angle
Which one of the following materials is used for manufacturing centre drills?
a. Cast steel b. High speed steel c. Mild steel d. Cast iron
For plain turning a 60 mm diameter work piece using HSS tool with recommended cutting
speed of 30 meters/ min, the rpm should be>
a. 80 rpm b. 192 rpm c.l59rpm d. 318 rpm
Ratchet stop in the micrometer helps to
a. Control the pressure b. Lock the spindle
c. Adjust zero error d. Hold the work piece
In the process of soldering, you have noticed thatsolder not sticking to sufficiently heated
copper soldering bit when rubbed over solder bar. What step do you take to overcome the
problem?
a. Pre- heat the solder b. Clean the bit thoroughly
c. Change the soldering bit shape d. Rub the bit over solder for longer period
A lathe half centre is used:-
a. To support the work piece always b. To turn long work piece
c. Because it is easy to lubricate the work piece d. To face the work piece up to the end
of the centre hole
A jig is a device which:-
a. Locate the work piece. b. Holds and supports the work piece
c. Guides the cutting tool d. Does all of these
Which one of the following is used for checking run out of the internal taper of machine
spindle?
a. Dial test indicator
b. Test mandrel and dial test indicator
c. Precision height gauge
d. Test mandrel and precision height gauge
During marking, the reference surface is provided by :-
a. Sketch of the job b. Work piece
c. Marking off table surface d. Surface gauge
Which one of the following tool angles is provided to avoid rubbing of the body of the tool
with the work piece:-
a. Rake angle b. Clearance angle c. Helix angle d. None of these
Which among the following is NOT the purpose of a grease?
a. Carry away heat produced in bearing
b. Prevent metal-to-metal contact and reduce friction
c. Prevent entry of foreign material i.e. dust, dirt etc. in the bearing
d. Provide a cushion to a load and shocks
The slots provided on angle plate for:-
a. Accommodating bolts b. Hanging with hooks
c. Reducing its weight d. Aligninng the work
Preventive maintenance is-
a. The overall lubrication and repair work carried out by the maintenance
section in advance of the machine coming to breakdown
b. The maintenance work for any fault noticed during the work
c. Done to prevent the maintenance of machines
d. None of the above
You want to fix an irregularly shaped work piece on a lathe, which one of the following
accessories is the most appropriate?
a. Three-jaw self-centering chuck b. Driving plate
c. Faceplate d. Catch plate
Carbide tipped tool used for turning hard material is provided:-
a. Side rake angle b. Zero rake angle
c. Positive rake angle d. Negative rake angle
Major defference between the Surface plate and marking plate is :-
a. Surface plate is harder than marking plate
b. Surface plate is more precise than marking plate
c. Both Surface plate and marking plates are precise
d. Marking plate is harder than surface plate
A sine bar is available in standard sizes. Which one of the following is NOT a standard size
of the sine bar:-
a. 100mm b. 200 mm c. 300 ram d. 250 mm
Correct geometry of cutting tool is essential for its cutting efficiency. State the reason why
positive top rake and side rake are provided in its tool geometry:-
a. Increase tool life b. Reduces cutting force on the tool
c. Easy flow of chip d. Reduces friction and temperature generation
Find the time required to turn a job -
a. 2 minute 300 mm long from dia 40 mm to 38 mm
b. 2.5 min while the machine is running at 900 rpm
c. 1.98 min permissible depth of cut is 1 mm
d. 1.5 min feed is 0.16 mm/rev
A traveling steady is fixed at the saddle of a lathe. What is the function ol this steady rest:-
a. To prevent bending of long shafts due to cutting force.
b. To avoid load on the lathe centres while turning long shafts.
c. To reduce the load on the cutting tool while turning,
d. To ensure to turn at higher cutting speeds than recommended.
Carbide tipped tool with blue marking is used on a lathe. Which one of the following
materials can be machined with this tool:-
a. Brass b. Grey cast iron c. Steel d. Plastic
Which one of the following is NOT the use of the dial test indicator?
a. To check the parallelism of finished components
b. To compare the dimensions of finished components
c. To check concentricity of round components
d. To measure the dimensions of finished components
Which among the following tests is carried out after overhauling and reconditioning of
machine:-
a. Periodic acceptance test b. Geometrical test only
c. Performance test only d. None of these
The marking plate is made up of:-
a. High speed steel b. Hardened steel
c. Cast iron d. Granite
Lock nut in the micrometer is provided to:-
a. Control the movement of the spindle
b. Lock the reading after setting it over the work piece
c. Measure the work piece accurately
d. Lock the micrometer when it is not in use
Which type of holding device is suitable for holding eccentric job>
a. Three-jaw chuck b. Four-jaw chuck
c. Faceplate d. Magnetic chuck
Inserted HSS tool bits are more useful for the operation :-
a. Boring b. External threading
c. Internal threading d. All of these
Tool maker's buttons are used for:-
a. Aligning the work piece for boring to a given datum
b. Setting the tool at correct centre height
c. Adjusting the slackness in the guide ways of cross-slide
d. Holding the work piece firmly
Which of the material generally used to manufacture twist drills?
a. HSS b. Carbide steel c. Diamond d. Cast steel
Which one of the following tool angle is provided to avoid rubbing of the body of the
with the work piece?
a Rake angle b. Helix angle c. Clearance angle d. None ot these
HSS is tempered at:-
a. 220°C to 230°C b. 230°C to 270°C c. 280°C to 400°C d. 550°C to 600°C
The commonly used proportions of alloying elements in HSS are-
a. 18% tungsten, 4% chromium and 1% vanadium
b. 18% chromium, 4% tungsten and 1% vanadium
c. 18% vanadium, 4% chromium and 1% tungsten
d. 18% cobalt, 4% chromium and 1% vanadium
Which one of the following tests is carried out after overhauling and reconditioning
machines?
a. Periodic acceptance test b. Geometrical test only
c .Performance test only d. None of these
The chip breaker on a lathe tool is essential when turning :-
a. Soft material b. Ductile material
c. Cast iron d. Hardened materials
Which one of the following is used to clamp the job in relation to the tool in mass production?
a jjo b. Fixture c. Housing d. Gauges
The tool made of cemented combide wear out faster at-
a. Slow speed b. Medium speed c. Fast speeds d. Very fast speeds
Which one of the following is NOT the property of a good lubricant?
a. No change in viscosity due to variation in temperature
b. Reduces friction between machine parts
c. Takes up the surface pressure between sliding parts
d. Becomes thicker after prolonged use
The permissible deviation for leveling of machine is>
a. 0.03/100 mm b. 0.03 / 200 mm c. 0.03 / 300 mm d. 0.03 / 400 mm
Which one of the following factors will NOT influence the selection of the cutting speed?
a. Diameter of the work piece b. Work piece material
c. Tool material d. Operation to be performed
The hardening temperature of HSS tool
a. 1250°C b. 950°C c. 850°C d. 750°C
Which among the following factors governs the selection of feed when turning a work piece?
a. Tool geometry b. Surface finish required
c. Types of coolant required d. All of these
If the pitch of a led screw is 6 mm and the pitch of the thread to be cut is 1.25 mm. then the
change of gears required are:-
a. Driving gears 40 & 120and Driven gears 50 & 20
b. Driving gears 50 & 20 and Driven gears 40 & 120
c. Driving gears 50 & 120 and Driven gears 40 & 20
d. Driving gears 40 & 20 and Driven gears 50 & 120
Which among the following statements is NOT correct:-
a. Jig is used for drilling operation b. Jig is used for planning operation
c. Jig is used for indexing operation d. Jig is used for boring operation
A sine bar is a precision instrument used to check the angular accuracy of tapered
components. Four or five equally spaced holes are drilled on the body of this sine
purpose of these holes is to:-
a. Handle the sine bar with ease b. Reduce the weight of the sine bar
c. Prevent distortion of the top surface d. Add appearance to the sine bar
A fixed steady rest is used to:-
a. Support the tool rigidly to avoid chatter during operation.
b. Support long shafts that are being threaded for their full length.
c. Support workpieces during facing large diameter work pieces with short length.
d. Support long workpieces held in chuck, to perform operations at the overhanging end.
Rake angle is not provided on a form tool used to produce taper on a work piece. The reason
for this is-
a. To reduce grinding time of the tool
b. To reduce wastage of tool material
c. Taper angle is not affected by re-sharpening
d. For the tool to have large wedge angle
Which one of the following materials is used for manufacturing centre drills?
a. Cast steel b. High speed steel c. Mild steel d. Cast iron
For plain turning a 60 mm diameter work piece using HSS tool with recommended cutting
speed of 30 meters/ min, the rpm should be>
a. 80 rpm b. 192 rpm c.l59rpm d. 318 rpm
Ratchet stop in the micrometer helps to
a. Control the pressure b. Lock the spindle
c. Adjust zero error d. Hold the work piece
In the process of soldering, you have noticed thatsolder not sticking to sufficiently heated
copper soldering bit when rubbed over solder bar. What step do you take to overcome the
problem?
a. Pre- heat the solder b. Clean the bit thoroughly
c. Change the soldering bit shape d. Rub the bit over solder for longer period
A lathe half centre is used:-
a. To support the work piece always b. To turn long work piece
c. Because it is easy to lubricate the work piece d. To face the work piece up to the end
of the centre hole
A jig is a device which:-
a. Locate the work piece. b. Holds and supports the work piece
c. Guides the cutting tool d. Does all of these
Which one of the following is used for checking run out of the internal taper of machine
spindle?
a. Dial test indicator
b. Test mandrel and dial test indicator
c. Precision height gauge
d. Test mandrel and precision height gauge
During marking, the reference surface is provided by :-
a. Sketch of the job b. Work piece
c. Marking off table surface d. Surface gauge
Which one of the following tool angles is provided to avoid rubbing of the body of the tool
with the work piece:-
a. Rake angle b. Clearance angle c. Helix angle d. None of these
Which among the following is NOT the purpose of a grease?
a. Carry away heat produced in bearing
b. Prevent metal-to-metal contact and reduce friction
c. Prevent entry of foreign material i.e. dust, dirt etc. in the bearing
d. Provide a cushion to a load and shocks
The slots provided on angle plate for:-
a. Accommodating bolts b. Hanging with hooks
c. Reducing its weight d. Aligninng the work
Preventive maintenance is-
a. The overall lubrication and repair work carried out by the maintenance
section in advance of the machine coming to breakdown
b. The maintenance work for any fault noticed during the work
c. Done to prevent the maintenance of machines
d. None of the above
You want to fix an irregularly shaped work piece on a lathe, which one of the following
accessories is the most appropriate?
a. Three-jaw self-centering chuck b. Driving plate
c. Faceplate d. Catch plate
Carbide tipped tool used for turning hard material is provided:-
a. Side rake angle b. Zero rake angle
c. Positive rake angle d. Negative rake angle
Major defference between the Surface plate and marking plate is :-
a. Surface plate is harder than marking plate
b. Surface plate is more precise than marking plate
c. Both Surface plate and marking plates are precise
d. Marking plate is harder than surface plate
A sine bar is available in standard sizes. Which one of the following is NOT a standard size
of the sine bar:-
a. 100mm b. 200 mm c. 300 ram d. 250 mm
Correct geometry of cutting tool is essential for its cutting efficiency. State the reason why
positive top rake and side rake are provided in its tool geometry:-
a. Increase tool life b. Reduces cutting force on the tool
c. Easy flow of chip d. Reduces friction and temperature generation
Find the time required to turn a job -
a. 2 minute 300 mm long from dia 40 mm to 38 mm
b. 2.5 min while the machine is running at 900 rpm
c. 1.98 min permissible depth of cut is 1 mm
d. 1.5 min feed is 0.16 mm/rev
A traveling steady is fixed at the saddle of a lathe. What is the function ol this steady rest:-
a. To prevent bending of long shafts due to cutting force.
b. To avoid load on the lathe centres while turning long shafts.
c. To reduce the load on the cutting tool while turning,
d. To ensure to turn at higher cutting speeds than recommended.
Carbide tipped tool with blue marking is used on a lathe. Which one of the following
materials can be machined with this tool:-
a. Brass b. Grey cast iron c. Steel d. Plastic
Which one of the following is NOT the use of the dial test indicator?
a. To check the parallelism of finished components
b. To compare the dimensions of finished components
c. To check concentricity of round components
d. To measure the dimensions of finished components
Which among the following tests is carried out after overhauling and reconditioning of
machine:-
a. Periodic acceptance test b. Geometrical test only
c. Performance test only d. None of these
The marking plate is made up of:-
a. High speed steel b. Hardened steel
c. Cast iron d. Granite
Lock nut in the micrometer is provided to:-
a. Control the movement of the spindle
b. Lock the reading after setting it over the work piece
c. Measure the work piece accurately
d. Lock the micrometer when it is not in use
Which type of holding device is suitable for holding eccentric job>
a. Three-jaw chuck b. Four-jaw chuck
c. Faceplate d. Magnetic chuck
Inserted HSS tool bits are more useful for the operation :-
a. Boring b. External threading
c. Internal threading d. All of these
Tool maker's buttons are used for:-
a. Aligning the work piece for boring to a given datum
b. Setting the tool at correct centre height
c. Adjusting the slackness in the guide ways of cross-slide
d. Holding the work piece firmly
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