FITTER (THEORY) SEMESTER - III February 2016

FITTER (THEORY) SEMESTER - III

February 2016

The main purpose of annealing is …….
A  to increase the hardness
B  to increase the toughness
C  to improve the machinability
D  to remove the distortion

Answer: C  to improve the machinability

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The important dimensions of a taper are.......

A. the large diameter and the length of the taper
B. the large diameter, the smaller diameter and
    the length of the taper

C. one diameter and the length of the taper
D. large diameter and the smaller diameter of
    the taper

Answer: B. the large diameter, the smaller diameter and
    the length of the taper

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File grades are determined by the
A  distance from the tip of the heel
B  spacing of the teeth
C  cut of the file
D shape of the file

Answer: B  spacing of the teeth

The first aid boxes should be properly
equipped and kept in..............

A  important places

B  machining area

C  easy access place

D  right position

Answer: C  easy access place

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Irregular shaped work piece are clamped on

the lathe in.........

A face plate
B  four jaw chuck
C  collet chuck
D mandrel

Answer: A face plate

Which type of thread is used in precision

instrument?
A  BSW thread
B  Acme thread
C  Square thread
D  BA thread

Answer: D  BA thread

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Three jaw chuck is also known as
A  self centering chuck
B  self chuck
C  automatic chuck
D  union chuck

Answer: A  self centering chuck

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What is used to measure the gap?
A  Tapper plug gauge
B  Slip gauge
C  Taper ring gauge
D  Thread gauge

Answer: B  Slip gauge

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The form of threads are used in the places
where the sliding forces act in one direction,

is........

A vee thread

B square thread

C trapezoidal thread

D saw tooth thread

Answer: D saw tooth thread

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The hardest cutting tool material
A  high speed steel
B  cemented carbide
C diamond
D stellite

Answer: C diamond

What is used to test an external taper?
A  Taper plug gauge
B  Taper ring gauge
C  Slip gauge
D  Thread gauge

Answer: B  Taper ring gauge

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The largest diameter of a screw thread is

known as................

A  minor diameter
B  normal diameter
C  major diameter
D  pitch diameter

Answer: C  major diameter

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The power is transmitted by lead screw to

the carriage through...........

A  gear system
B  pulley drive

C  rack and pinion arrangement
D  half nut

Answer: D  half nut

In which operation on a workpiece
the spindle speed will be least?

A  Parting off

B  Thread cutting

C Finishing

D  Taper turning

Answer: B  Thread cutting

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Steady rest is..............

A  an additional support provided for long jobs
B  used while turning un symmetrical objects
C  used during thread cutting only
D  used when a lathe is subjected to vibrations

Answer: A  an additional support provided for long jobs

The work having finished hole, is mounted

on...........

A  face plate
B  collet chuck
C  mandrel
D  four jaw chuck

Answer: C mandrel

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The basic function of cutting fluids are.....

A  cleaning and lubrication

B  facilitating chip removal and lubrication

C  cools the tool and the workpiece

D  cooling and flushing chips away from the

cutting area

Answer: C  cools the tool and the workpiece

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How many grades of slip gauges an

recommended by BIS - IS: 2984?

A. 2

B. 3

C. 4

D. 5

Answer: B. 3

Slip gauge designated with 'Grade P is used

for.......

A workshop
B inspection
C calibration
D reference

Answer: C calibration

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What must be done to prevent the chuck
from damaging the lathe guide ways, while
mounting?

A  Lift the chuck with a hand crane

B  Ask the instructor for help

C  Place a wooden block or board on guide-
     ways

D   Support with a screw jack

Answer: C  Place a wooden block or board on guide-
     ways

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Which one of the following methods of thread

catching is used to cut metric threads on a

British lathe?
A  Using a chasing dial
B  By reversing the machine
C  By making the predetermined travel of the

     carriage on the bed
D  Marking reference lines on the head stock as

     well as on the lead screw

Answer: B  By reversing the machine

Benefits of the 5S systems are
A  increase the cleanliness
B  increase the productivity
C  decrease the production rate
D  maintain the production rate

Answer: B  increase the productivity

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In which gauge GO and NOGO comes in the
same end?

A. Double ended plug gauge
B. Snap gauge
C. Progressive gauge
D. Depth gauge

Answer: C. Progressive gauge

The lathe part which is used to hold the drill

is.......

A tool post

B tail stock

C head stock

D spindle

Answer: B tail stock

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Sine bar is specified by............

A  its total length

B  the centre distance between the two rollers
C  the size of the rollers
D  the distance between rollers and upper
     surface

Answer: B  the centre distance between the two rollers

Name the material commonly used for
thicker walled bearing bushes carrying
hardened steel shafts.

A  Phosphor bronze

B Brass

C Aluminium

D Copper

Answer: A  Phosphor bronze

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Tempering is the process of removing the

property of............

A brittleness
B malleability
C toughness
D ductility

Answer: A brittleness

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The number of pieces in a standard set of
angle slip gauge in the second series is....
A. 3

B. 4

C. 5

D. 6

Answer: A. 3

Sine bar is made out of....

A nickel steel

B high speed steel

C high carbon steel

D stabilised chromium steel

Answer: D stabilised chromium steel

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Which type of bearing intended to carry

radial loads?
A  Ball bearing
B   Thrust ball bearing
C  Roller bearing
D  Tapered roller - bearing

Answer: C  Roller bearing

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Which type of nut will have a nylon or fibre
ring insert placed in the upper part of the
nut?

A  Self locking nut
B  Wire lock
C  Sawn nut
D  Grooved nut

Answer: A  Self locking nut

The purpose of grooves given on the lapping

plate is for.............

A  reducing friction

B  retaining lapping paste

C  collecting the metal chips

D  preventing distortion of the plate

Answer: B  retaining lapping paste

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The abrasive used for honing of non - ferrous
metal is.........

A boron carbide

B diamond

C silicon carbide

D aluminium oxide

Answer: C silicon carbide

Which type of nut prevents the rotation of the

top nut?

A. Sawn nut
B. Grooved nut
C. Self - locking nut
D. Lock nut

Answer: D. Lock nut

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In the number drill series, the number 80 drill

size is............

A 0.1035"
B 0.0135"
C 0.228"
D 0.258"

Answer: B 0.0135"

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In the letter drill series, the size of the drill 'A'

is equal to............

A 0.413"
B 0.431"
C 0.264"
D 0.234"

Answer: D 0.234"

While normalizing, the component should be

cooled..........

A  by dipping in water

B   in still air to room temperature

C  by forced air

D  by quenching in oil

Answer: B   in still air to room temperature

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The form tool method of turning taper is

suitable for...........

A   lengthy jobs with slow tapers
B   any length of work
C  very short at any angle
D  short and slow angle .

Answer: C  very short at any angle

The number of threads per inch can be

checked with a...........

A tool gauge
B metric rule
C ring gauge
D  screw pitch gauge

Answer: D  screw pitch gauge

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A tool which is used to enlarge a drilled hole

is called..........

A  poring tool

B  facing tool

C  form tool

D  ring hand turning tool

Answer: A  poring tool

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