1) The unit of a lathe that houses the lathe spindle and control levers for speed selection is called .................
Headstock
Carriage
Tailstock
Apron
Correct answer
Headstock
2) The method used for taper turning on a lathe machine is ..............
Compound rest method
The tailstock set over method
Taper turning attachment method
All of these
Correct answer
All of these
3) The cutter in a milling machine is mounted on ...................
Arbor
Tool holder
Spindle
All of these
Correct answer
All of these
4) The slowest speed in the lathe is adopted for the following operation ............
Thread cutting
Taper turning
Knurling
None of these
Correct answer
Thread cutting
5) The job-supporting device that is bolted to the back end of the carriage and moved along during machining operation is called ....................
Compound rest
Steady rest
Angle plate
Follower Rest
Correct answer
Follower Rest
6) How do you specify a lathe ................
The height of the centers
Swing diameter over bed
The length between centers
All of these
Correct answer
All of these
7) Lathe bed is made of ..............
Mild steel
Stainless steel
Cast iron
None of these
Correct answer
Cast iron
8) The tailstock is used to ...................
Support the other end of the work when it is being machined between
Holds a tool for performing operations such as drilling, reaming, tapping etc.
Both (a) and (b)
None of the above
Correct answer
Both (a) and (b)
9) The taper of internal dovetail can be measured with the help of ................
Balls of standard dimensions and slip gauges
Sine bar
Combination set
Dial gauge
Correct answer
Balls of standard dimensions and slip gauges
10) The case of multi-start threads if p is pitch and N is No. of starts then the lead of screw thread is ....................
p/N
PxN
p+N
p—N
Correct answer
PxN
11)When machining, a hard and brittle metal like cast iron, the type of chips produced is ..................
fine chips
continuous chips with a built-up edge
Continuous chips
Discontinuous chips
Correct answer
fine chips
12) Which defect arises due to faulty heat treatment?
Overheating and Burning
Oxidation and Decarburization
Cracks, Distortion, and Warping
All of these
Correct answer
All of these
13) In general, hardening is followed by ....................
Annealing
Tempering
Case hardening
None of these
Correct answer
Tempering
14) The transformation of austempering gives the product of .................
Bainite
Cementite
Martensite
Ledeburite
Correct answer
Martensite
15) The term heat treatment is used to describe a process controlled by ..............
a) Temperature
b) Heating
c) Cooling
d) Both (b) and (c)
Correct answer
d) Both (b) and (c)
16) Ceramic cutting tools are -
Made by cold pressing of aluminum oxide powder
Available in the form of tips
Brittle and have a low bending strength
All of these
Correct answer
All of these
17) Which furnaces are extensively used because they give uniformity of temperature in the heat treatment chamber?
Oil fired furnaces
Gas fired furnaces
None of these
Correct answer
Electric furnaces
18) Carbon nitriding is carried out in gas mixture consisting of carburizing gas and ..................
Nitrogen
Sulfur
Hydrogen
Ammonia
Correct answer
Ammonia
19The annealing process is used to ..................
Provide wear resistance
Increase the hardness
Refine the structure
Soften the steel
Correct answer
Soften the steel
20) The diameter of the finish turned shaft can best be checked with a ...............
Slip gauge
Dial indicator
Height gauge
Micrometer
Correct answer
Micrometer
21) Straightness can be checked with the help of ...................
Height gauge
Spirit level
Sine bar
Slip gauge
Correct answer
Spirit level
22) The accuracy depends upon ...................
Precision of instrument
Precision of method
Good planning
All of these
Correct answer
Precision of instrument
23) Surface roughness on a drawing is represented by ................
Rectangles
Triangles
Circles
Squares
Correct answer
Triangles
24) The bearing used for heavier loads is ................
a) Roller bearing
b) Ball bearing
c) Both (a) and (b)
d) None of these
Correct answer
a) Roller bearing
25) Tapered roller bearings can take .................
a) Axial load only
b) Radial load only
c) Both (a) and (b)
d) None of these
Correct answer
c) Both (a) and (b)
No comments:
Post a Comment