FITTER QUESTION 2nd year 8

 FITTER QUESTION 2nd year 8

152 What is the purpose of lapping tool?

A Lapping tool for external surface

B Lapping tool for internal surface 

C Lapping tool for external cylindrical surface 

D Lapping tool for internal cylindrical surface

Correct Answer:- C Lapping tool for external cylindrical surface 

153 What is the temperature that change of structure to austenite starts at 723° in heat treatment process? 

A Lower critical temperature 

B Upper critical temperature

C Melting temperature 

D Critical temperature

Correct Answer:- A Lower critical temperature 

154 What is the process if hot steel is cooled slowly the old structure is retained and it will have fine grains that makes it easily machined? 

A Annealing

B Hardening 

C Tempering  

D Correct Answer:- 

Correct Answer:- A Annealing

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?

A Internal type washer 

B External type washer 

C Internal and External washer 

D Counter sunk washer

Correct Answer:- C Internal and External washer