SEM - IV Jan 2018

A fixture does not ......
a) Holds the workpiece  
b) Locate the workpiece
c) Guide the tool
d) All of these

Fixture are used ......
a) For holding and guiding the tool in drilling, reaming or tapping operation
b) For holding the work in milling, grinding, planning, or turning operation
c) To check the accuracy of workpiece
d) None of the above

Which angle is make side and surface of angle plate?
a) 200°
b) 450°
c) 900°
d) 1200°

The slot is cut in angle plate because of .......
a) For lift by hook
b) For keep job straight
c) For less weight
d) For tighten nut & bolt

........... grade angle plate is used in generally machine shop.
a) A   b) B   c) C   d) D

........is a heat treatrnent process for surface hardening.
a) Carburising
b) Normalising
c) Annealing
d) Tempering

Fixture is most productive tool because .......
a) Hold the job
b) Locate the job
c) Both (a) & (b)
d) Guide the cutting tool

Feed is given ......... types for thread cutting.
a) 4   b) 2   c) 3   d)5

Lead ......... 
a) Pitch x no. of start
b) Pitch x no. of lead
c) Lead x Root
d) Root x Crest

The process of steel is heated or chilled for achieve desired property is known as ........
a) Tempering
b) Hardening
c) Annealing
d) Heat treatment

The cutting edge of a chisel should be ......
a) Hardened 
b) Tempered
c) Hardened & Tempered
d) Case hardened

Tempering is done to ......
a) Increase toughness & Decrease brittleness
b) Cutting edge is hardened
c) Cutting edge is softened
d) Cutting edge is brittled

GS4 is means a 
a) Select zero offset
b) Zero offset
c) Offset zero
d) zero name

G is symbol of .......
a) Start function  
b) End fUnction
c) Medium ftmction
d) All ofthese

PLC is part of .........
a) PNC    b) CMG c) DMC   d) CNC

Tool offset function is indicated by ........ word.
a) A   b) B   c) C   d) D
The translator program used assembly language is called ...
a) Compiler
b) Interpreter
c) Assembler
d) Translator

The value of one micron is —
a) 0.001mm
b) 0.01mm
c) 0. 1mm
d) 0.001 mm

Quality control is main purpose of ......... cost product used.
a) More b) Less
c) Average d) All of these

The process of improving the cutting action of grinding wheel is called ........
a) Truing
b) Dressing
c) Facing
d) Clearing

In order achieve a specific finish in single point turning, the most important to be controlled is .......
a) Depth of cut
b) Cutting speed
c) Feed
d) Tool rake angle

Work done in metal cutting depends on ......
a) Cutting force & Cutting speed
b) Cutting speed & Heat generated
c) Depth of cut & Cutting speed
d) Cutting force & depth of cut

If chip thickness increases tool wears at .......
a) Less
b) Moderate
c) More rapid
d) None of these

Cutting speed is expressed in ......
a) Meter per second
b) Meter per minute
c) Millimeter per minute
d) Centimeter per minute

The factor which affects the tool life is ...........
a) Tool geometry
b) Cutting speed
c) Feed rate
d) All of these

Larger end cutting edge angletool life.
a) Increases
b) Decreases
c) No effect  
d) Constant

Pressure applied on workpiece in case of lapping operation is —
a) 0.01kg/cmsq
b) 0.1kg/cmsq
c) 0.5kg/cmsq
d) 1.0kg/cmsq

Honing is used to .......
a) Correct ovality
b) Waviness of axis
c) Non-parallelism of cylindrical features
d) All of these

Machine lapping is performed on  ........
a) Roller bearings
b) Crankshafts
c) Pistons
d) All of these

The usual amount of stock left for removal by honing is from ......
a) 0. 1mm to 0.25mm
b) 0.75mm to 0.90mm
c) 0.90mm to 1.05mm
d) 1.05mm to 1.25mm

Largest amount of material is used in ......
a) Buffing
b) Lapping
c) Honing
d) Superfinishing

The following is preferred for lapping soft ferrous and non-ferrous metals ......
a) Silicon carbide
b) Natural corundum
c) Aluminium oxide
d) All of these

The surface roughness on a drawing is represented by
a) Circle
b) Square
c) Triangle
d) Zig-Zag lines

Encoder is used in CNC machine tool, to sense and control ........
a) Spindle speed
b) Spindle position
c) Table position
d) All of these

The process of decomposing martensitic sfructure, by heating martensitic steel below its critical temperature is called as .....
a) Normalizing
b) Quenching
c) Tempering
d) Carburizing

Which of the following factors increases hardenability of a metal?
a) Alloying elements
b) Fine grain size
c) Very high carbon content in steel
d) All of these

Which carburizing method has high production rate?
a) Pack carburizing  
b) Liquid carburizing
c) Gas carburizing
d) All of these

Process control is carried out ......
a) Before production  
b) During production
c) After production control
d) All of these

Low cost, higher volume items requires .......
a) No inspection
b) Little inspection  
c) Intensive inspection
d) 100% inspection

Pre condition for deciding zero offset is .......
a) Cutter must be fixed jn machine spindle
b) Data must be entered in machine
c) Work must be clamped on the machine table
d) Feed, Speed etc. must be decided

The following type of lathe is operated through cams and cam plate ......
a) Precision lathe
b) Crankshaft lathe
c) Automatic lathe
d) Duplicating lathe

The following part of lathe serves as housing for the driving pulleys and back gears —
a) Head stock
b) Tail stock
c) Bed
d) Carriage

The following acts as driving shaft in lathe .....
a) Countershaft
b) Spindle shaft
c) Lead screw
d) None of these

The following is used for holding bored parts for machining their outside surfaces on lathe .......
a) Mandrel
b) Dogs
c) Driving plate
d) Angle plate

The following is used to turn very long job between centers on a lathe ........
a) Steady rest
b) Follower rest
c) Compound rest
d) All of these

The following is used to support to flexible job very close to the cutting edge .......
a) Steady rest  
b) Follower rest
c) Compound rest
d) All of these

G78 represents  ......
a) Rough turning
b) Thread cutting
c) Rough facing
d) Finishing cycle

CAD and CAM are related through  .......
a) NC tapes
b) Automation tools
c) Part production & testing
d) Common data base

In CNC machines, the controlling of function like speed, feed, tool positioning etc. are  controlled by .........
a) Numeric codes
b) Alpha codes
c) Alpha numeric codes
d) Photo sensing system

Which one of the following is not advantage of CNC machines .......
a) One machine can perform severai operation
b) Inspection cost is very loss
c) Difficult to correct the dimension variation
d) Functioning of machine not dependent on operational skills

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