FITTER Q&A MCQ SEM-3 IN Tamil -2 (தமிழ்) 7
151 Which lapping vehicle is used for lapping copper and its alloys?
152 What is the purpose of lapping tool?
155 What is the name if hot steel cooled rapidly to form a new structure ?
A Ferrite
B Austenite
C Martensite
D Pearlite
Correct Answer:- C Martensite
156 What is the process to add cutting ability and wear resistance on steel?
A Tempering
B Annealing
C Normalising
D Hardening
Correct Answer:- D Hardening
157 What is the heat treatment process to remove extreme brittleness and induce toughness and shock resistance in steel?
A Tempering
B Annealing
C Normalising
D Hardening
Correct Answer:- A Tempering
158 What is the process of steel being heated to required temperature and held in the same temperature for a period of time?
A Soaking
B Heating
C Quenching
D Hardening
Correct Answer:- A Soaking
159 What is the purpose of brine solution, water, oil and air used in heat treatment process?
A Soaking
B Quenching
C Heating
D Austenite
Correct Answer:- B Quenching
160 What quenching media is used for special alloy steels?
A Brine solution
B Water
C Oil
D Cold Air
Correct Answer:- D Cold Air
161 What is the heat treatment process of reheating the hardened steel to a temperature below 400°C followed by cooling?
A Tempering
B Hardening
C Annealing
D Normalising
Correct Answer:- A Tempering
162 What is the advantage of annealing ?
A To relieve the internal stress
B To add cutting ability
C To refine the grain structure of the steel
D To increase wear resistance
Correct Answer:- A To relieve the internal stress
163 What is the process of removing the internal defects of steel components?
A Annealing
B Normalising
C Hardened
D Tempering
Correct Answer:- B Normalising
164 Which key is used for transmitting light torque?
A Saddle key
B Woodruff key
C Gib head key
D Feather key
Correct Answer:- B Woodruff key
165 How the mechanical properties of steel like strength, toughness, ductility are affected?
A By tempering
B By hardening
C By annealing
D By normalising
Correct Answer:- B By hardening
166 Which bearing material has poor thermal conductivity?
A Nylon
B Teflon
C Sintered alloys
D Laminated phenolics
Correct Answer:- D Laminated phenolics
167 What is the purpose of deep groove type of ball races provided in the ball bearing?
A To withstand shock
B To carry journal loads
C To withstand axial thrust
D To withstand radial load
Correct Answer:- C To withstand axial thrust
168 Why the double row roller bearing is used?
A To take axial load
B To take radial load
C To take heavy axial load
D To take heavy radial load
Correct Answer:- D To take heavy radial load
169 Why the melting point of bearing material should be lower than that of the shaft? |
A Prevents shaft seizure
B Prevent damage to bearing
C Allow the bearing to run efficiently
D Prevent thermal expansion of shaft
Correct Answer:- A Prevents shaft seizure
170 What is the name of washer?
Correct Answer:- C Internal and External washer
171 Which alloying metal bearing can work at higher temperature and higher load carrying capacity?
A Cast iron
B White metal
C Copper lead alloys
D Cadmium based alloy
Correct Answer:- D Cadmium based alloy
172 What is the method of metal coating?
174 Which metal protects corrosion resistant and does not crack or peel off due to temperature variation on coating?
A Zinc
B Nickel
C Copper
D Chromium
Correct Answer:- A Zinc
175 Which corrosion resistant metal is used in chemical plant and food processing?
A Lead
B Copper
C Aluminium
D Stainless steel
Correct Answer:- D Stainless steel
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