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101. |
Any process of heating and cooling steel that produces a rounded or globular from of carbide is known as |
A. | Spheroidizing |
B. | Drawing |
C. | Nomalizing |
D. | Nitriding |
E. | Ultra hardening |
Answer» A. Spheroidizing |
102. |
During stress relaxation phenomenon |
A. | Deformation tends to bind the joint and produces a stress reduction |
B. | Deformation tends to loosen the joint and produces a stress reduction |
C. | Stress is no longer proportional to strain |
D. | Stress reduces on increasing load |
E. | None of the above |
Answer» E. None of the above |
103. |
The materials which has the same elastic properties in all directions is called |
A. | Brittle material |
B. | Homogeneous material |
C. | Hard material |
D. | Isotropic material |
E. | Isentropic material |
Answer» D. Isotropic material |
104. |
Accounstical materials |
B. | Isentropic material |
C. | Create sound |
D. | Absorb sound |
E. | Reflect sound |
Answer» D. Absorb sound |
105. |
Recrystallistion temperature is one |
A. | At which change of allotropic form takes place. |
B. | At which crystals start growing in size |
C. | At which new spherical crystals first begin to form from the old deformed ones when a strained metal is heated |
D. | At which polycrystalline changes occur |
E. | At which crystals again begin to appear |
Answer» C. At which new spherical crystals first begin to form from the old deformed ones when a strained metal is heated |
106. |
Super conductors |
A. | Exist at temperatures below 10?K |
B. | Are non-crystalline |
C. | Are non-metallic substances |
D. | Are the purest forms of metals |
E. | Are the density metals without voids |
Answer» A. Exist at temperatures below 10?K |
107. |
In powder metallurgy the process of heating the cold pressed metal powder is known as |
A. | Sintering |
B. | Granulation |
C. | Deposition |
D. | Precipitation |
E. | None of the above |
Answer» A. Sintering |
108. |
The main constituent of glass is |
A. | B2O3 |
B. | Al2O3 |
C. | Semi-conductors |
D. | CaCO3 |
E. | SiO2 |
Answer» E. SiO2 |
109. |
In iron-iron carbide diagram the |
A. | Abscissa is time |
B. | Abscissa is temperature |
C. | Abscissa is carbon percentage |
D. | Ordinate is time |
E. | None of the above |
Answer» C. Abscissa is carbon percentage |
110. |
Spot the process which is different from others? |
A. | Galvanizing |
B. | Chapmanizing |
C. | Carburizing |
D. | Cyaniding |
E. | Nitriding |
Answer» A. Galvanizing |
111. |
The Curic point for Rochelle salt is about |
A. | 1000?C |
B. | 500?C |
C. | 240?C |
D. | Absolute zero |
E. | None of the above |
Answer» C. 240?C |
112. |
Which of the following is the ductile material? |
A. | Aluminium |
B. | Zinc |
C. | Brass |
D. | Silver |
E. | Stainless steel |
Answer» D. Silver |
113. |
The structure of a semi-conductor resemles that of a |
A. | circle |
B. | rhombus |
C. | diamond |
D. | triangle |
E. | None of the above |
Answer» C. diamond |
114. |
In electro-forming the metal is supplied to the mould from |
A. | Solution |
B. | By liquids |
C. | Electrolytic solution in which bar of pure metal acts as an anode for the plating current |
D. | Separately by coating with a point |
E. | None of the above |
Answer» C. Electrolytic solution in which bar of pure metal acts as an anode for the plating current |
115. |
A bot in cupola is |
A. | A part of coupla |
B. | A defect in casting |
C. | A kind of cast iron |
D. | A flux |
E. | A clay plug to close tap hole |
Answer» A. A part of coupla |
116. |
Constantan is an alloy of |
A. | Copper-tin-zinc |
B. | Copper-tin |
C. | Copper-aluminium |
D. | Copper and Nickel |
E. | Nickel-iron-chromium |
Answer» D. Copper and Nickel |
117. |
Hot tear |
A. | Is a defect in castings |
B. | Is a process involving heating |
C. | Is a defect in wood |
D. | Is a phenomenon occurring in materials ixposed to weather e.g. sun and rain |
E. | Is a physical property of non-ferrous materials |
Answer» A. Is a defect in castings |
118. |
Coarse grained steels |
A. | Do not have tendency to distort |
B. | Are less tough |
C. | Are very tough |
D. | Are lighter |
E. | Are denser |
Answer» B. Are less tough |
119. |
In press work the dies that perform two or more operations simultaneously, but at different stations are known as |
A. | Multi-dies |
B. | Simple dies |
C. | Compound dies |
D. | Die and punch set |
E. | Progressive dies |
Answer» E. Progressive dies |
120. |
Vanadium is added to steel as an alloying element to |
A. | To soften the material |
B. | Increase temperture resistance |
C. | Increases resistance to corrosion |
D. | Increase shock resistance |
E. | Modify yield and tensile strength properties |
Answer» A. To soften the material |
121. |
Micro-structure of a material is generally examined by |
A. | Spectroscope techniques |
B. | Optical microscope |
C. | X-rays and electron diffraction |
D. | Naked eye |
E. | Microscope |
Answer» E. Microscope |
122. |
Ferri-magnetic materials generally find application as |
A. | conductors |
B. | insulators |
C. | resistors |
D. | semi-conductors |
E. | None of the above |
Answer» D. semi-conductors |
123. |
Which process is used for machining parts to planned dimensions? |
A. | Shearadising |
B. | Swaging |
C. | Electroforming |
D. | Anodizing |
E. | Routing |
Answer» E. Routing |
124. |
Polymers |
A. | Semi-conductors |
B. | Can be vaporised but cannot be recycled |
C. | Can be recycled but cannot be vaporised |
D. | Can be vaporised as well as recycled |
E. | Can neither be vaporised nor recycled |
Answer» E. Can neither be vaporised nor recycled |
125. |
Which of the following is a fuel used in fast reactors? |
A. | Chromium |
B. | Plutonium |
C. | Zirconium |
D. | Heavy water |
E. | Graphite |
Answer» B. Plutonium |
126. |
Cold work is done on the metal |
A. | Below the thermal critical range |
B. | Above the thermal critical range |
C. | At zero degree centigrade temperature |
D. | After slightly warning the metal in furnace |
E. | None of the above |
Answer» A. Below the thermal critical range |
127. |
Which of the following timber is used for sports goods? |
A. | Mulberry |
B. | Mahogany |
C. | Sal |
D. | Deodar |
E. | None of the above |
Answer» A. Mulberry |
128. |
The statement that, at equilibrium, the number of phases plus the degrees of freedom must equal the number of components plus two is known as |
A. | Gibbs phase rule |
B. | Lever rule |
C. | Fick's rule |
D. | Heisenberg rule |
E. | None of the above |
Answer» A. Gibbs phase rule |
129. |
Steel balls for ball bearings are hardened to |
A. | 100 VPN |
B. | 400-700 VPN |
C. | 700-800 VPN |
D. | 150-200 VPN |
E. | 200-400 VPN |
Answer» C. 700-800 VPN |
130. |
Muntz metal contains |
A. | Copper-tin |
B. | Copper-chromium |
C. | Copper-nickel |
D. | Copper-zinc |
E. | Copper-alminium |
Answer» D. Copper-zinc |
131. |
Corrosion is a destructive attack on metals |
A. | Which may be chemical or electrochemical in nature |
B. | Which is basically caused by atmospheric air |
C. | Which is caused by contact with other metals |
D. | At high temperature |
E. | None of the above |
Answer» A. Which may be chemical or electrochemical in nature |
132. |
The depth hardness of steel increases by the addition of |
A. | Silicon |
B. | Nickel |
C. | Manganese |
D. | Sulphur |
E. | Chromium |
Answer» E. Chromium |
133. |
Dielectric strength of a material is |
A. | Capacity to withstand high voltage |
B. | Magnetic property |
C. | Energy storage capacity |
D. | Capacity to resist flow of current |
E. | Capacity to take two stresses |
Answer» A. Capacity to withstand high voltage |
134. |
The presence of sulphur in pig iron makes |
A. | Its casting unsound |
B. | It malleable |
C. | It brittle |
D. | It hard |
E. | It machinable |
Answer» A. Its casting unsound |
135. |
Shot blasting is the process for the cleaning of |
A. | Pattern |
B. | Cores |
C. | Moulding sand |
D. | Welded components |
E. | Castings |
Answer» E. Castings |
136. |
The process of zinc coating used extensively for protecting steel from atmospheric deterioration is known as |
A. | Anodizing |
B. | Colourizing |
C. | Pakerizing |
D. | Galvanizing |
E. | None of the above |
Answer» D. Galvanizing |
137. |
The process of producing parts by electrolytic deposition of metal upon a conductive removable mould or matrix is known as |
A. | Plating |
B. | Deposition |
C. | Electro-moulding |
D. | Electrolysis |
E. | Electro forming |
Answer» E. Electro forming |
138. |
Some engineering materials are made up of more than one phase, with different mechanical properties, such materials are known as |
A. | Discontinuous |
B. | Brittle |
C. | Plastic |
D. | Heterogeneous |
E. | None of the above |
Answer» D. Heterogeneous |
139. |
Chromium when added as an alloying element to steels |
A. | Increases corrosion resistance |
B. | Increases red hardness |
C. | Refines the grain structure |
D. | Improves mechanical properties |
E. | Softens the material |
Answer» A. Increases corrosion resistance |
140. |
The essential gradient of any hardened steel is |
A. | Martensite |
B. | Cementite |
C. | Pearlite |
D. | Carbon |
E. | Austenite |
Answer» A. Martensite |
141. |
Which type of thermostat is generally used in applicances with heating elements? |
A. | Bimetallic |
B. | Magnetic |
C. | Clad metal |
D. | Ferromagenetic |
E. | None of the above |
Answer» A. Bimetallic |
142. |
In order to measure/detect materials by non-destructive testing the method generally used is |
A. | Mossbanser effect |
B. | Thermochemic point |
C. | Infrared radiometer |
D. | Liquid crystallography |
E. | Acoustic emission |
Answer» E. Acoustic emission |
143. |
The defect blow hole in castings is caused due to |
A. | Hard ramming |
B. | Excessive moisture |
C. | Improper venting |
D. | Excessive carbouacious material |
E. | Any of the above |
Answer» E. Any of the above |
144. |
Spring steels should have high resistance to |
A. | Shocks |
B. | Fatigue |
C. | Corrosion |
D. | Deformation |
E. | All of the above |
Answer» D. Deformation |
145. |
The specific gravity of cast iron is closer to |
A. | 11 |
B. | 9 |
C. | 7 |
D. | 5 |
E. | 3 |
Answer» C. 7 |
146. |
The theory of failure generally applied in case of brittle materials is |
A. | Maximum shear stress theory |
B. | Maximum principal stress theory |
C. | Theory of superposition |
D. | Maximum strain energy theory |
E. | Maximum shear strain energy theory |
Answer» B. Maximum principal stress theory |
147. |
All of the following are destructive tests on materials EXCEPT |
A. | Charpy test |
B. | Tensile test |
C. | Cupping test |
D. | Fatigue test |
E. | Shore's scleroscope hardness test |
Answer» E. Shore's scleroscope hardness test |
148. |
If steel is quenched in oil the structure obtained is |
A. | Acicular |
B. | Troosite |
C. | Pearlite |
D. | Sorbite |
E. | Martensite |
Answer» B. Troosite |
149. |
Which of the following is p-type semi-conductor? |
A. | Selenium |
B. | Silicon doped with phosphorous |
C. | Silicon doped with gallium |
D. | All of the above |
E. | None of the above |
Answer» C. Silicon doped with gallium |
150. |
The amount of energy expended by the action of external force in deforming an elastic body is known as |
A. | Elastic energy |
B. | Deformation energy |
C. | Strain energy |
D. | Work done |
E. | Potential energy |
Answer» C. Strain energy |
151. |
When the atomic magnetic moments are randomly oriented in a solid, its magnetic behaviour is termed as |
A. | polycrystalline |
B. | anti-ferromagnetic |
C. | paramagnetic |
D. | semi-magnetic |
E. | None of the above |
Answer» C. paramagnetic |
152. |
Plastic are |
A. | Good conductors of heat and bad conductors of electricity |
B. | Good conductors of heat as well as electricity |
C. | Bad conductors of heat and good conductors of electricity |
D. | Bad conductors of heat as well as electricity |
E. | Semi-conductors |
Answer» D. Bad conductors of heat as well as electricity |
153. |
Which of the following does not contain copper as one of the alloying elements? |
A. | Monel metal |
B. | Perminivar |
C. | Nichrome |
D. | Manganin |
E. | All of the above |
Answer» C. Nichrome |
154. |
When the metals are severely deformed in a particular direction, as in rolling or forging (on a macro scale), the mechanical properties may be |
A. | Anisotropic |
B. | Identical |
C. | Isotropic |
D. | Uniform |
E. | Non-uniform |
Answer» A. Anisotropic |
155. |
The product of blast furnace is known as |
A. | High carbon steel |
B. | Steel |
C. | Pig iron |
D. | Crude iron |
E. | Cast iron |
Answer» B. Steel |
156. |
The defect responsible for the phenomenon of slip, by which most metals deform plastically, is known as |
A. | Fracture |
B. | Twinning |
C. | Dislocation |
D. | Strain hardening |
E. | None of the above |
Answer» C. Dislocation |
157. |
In a 0.2% carbon steel which has been heated above the third critical temperature on cooling at the first critical point the austenite remaining in solution is transformed to new structure called |
A. | Ferrite |
B. | Cementite |
C. | Austenite |
D. | Ferrite |
E. | Pearlite |
Answer» E. Pearlite |
158. |
Which material has the best damping capacity |
A. | Cast iron |
B. | Mild steel |
C. | High speed steel |
D. | Diamond |
E. | Stainless steel |
Answer» A. Cast iron |
159. |
If a material recovers its original dimensions, when the load is removed, it is known as |
A. | Elastic |
B. | Soft |
C. | Annealed |
D. | Plastic |
E. | Brittle |
Answer» A. Elastic |
160. |
In plain carbon steel as the percentage of carbon increases from 0.2% to 0.8% which of the following decreases? |
A. | Brinell hardness number |
B. | Tensile strength |
C. | Percentage elongation |
D. | All of the above |
E. | None of the above |
Answer» C. Percentage elongation |
161. |
In press work the dies which combine two or more operations at one station are known as |
A. | Progressive dies |
B. | Die and punch |
C. | Simple dies |
D. | Compound dies |
E. | Press |
Answer» D. Compound dies |
162. |
Spring steel sections are originally applied in |
A. | Hardened condition |
B. | Hardened and tempered condition |
C. | Annealed condition |
D. | Carburized condition |
E. | None of the above |
Answer» C. Annealed condition |
163. |
Which of the following ray has least wavelength? |
A. | Yellow light rays |
B. | Ultraviolet rays |
C. | X-rays |
D. | Cosmic rays |
E. | Infra-red rays |
Answer» D. Cosmic rays |
164. |
Cheek is |
A. | Top surface of metal |
B. | Physical property of metal |
C. | Non-ferrous coating on materials |
D. | Core of the welded joints in case of very thick material |
E. | Intermediate flask between copes and drag |
Answer» E. Intermediate flask between copes and drag |
165. |
Which of the following is 'acceptor' impurity for semi-conductor? |
A. | Arsenic |
B. | Phosphorous |
C. | Boron |
D. | Antimony |
E. | All of the above |
Answer» C. Boron |
166. |
The loss of strength in compression which occurs when there is a gain in strength in the tension due to overloading is |
A. | Iso-strain |
B. | Hysteresis |
C. | Bounhinger effect |
D. | Relaxation |
E. | Hooke's effect |
Answer» B. Hysteresis |
167. |
Electronic structure of a material is generally studied by |
A. | Mossbauer studies |
B. | Microscope |
C. | Naked eye |
D. | X-ray and electron diffraction |
E. | Spectroscope techniques |
Answer» E. Spectroscope techniques |
168. |
Steel castings |
A. | Cannot withstand impact |
B. | Are not weldable |
C. | Are weldable |
D. | Have poor endurance properties |
E. | Can withstand impact |
Answer» C. Are weldable |
169. |
Cold shuts are |
A. | Saturation of pores in bricks |
B. | Saturation of pores in metals by subsituting materials different from parent materials |
C. | Defects in castings due to two streams of metal which are too cold to fuse properly |
D. | Forging defects due to improper heating of materials |
E. | None of the above |
Answer» C. Defects in castings due to two streams of metal which are too cold to fuse properly |
170. |
The property of metal when the recovery after unloading is complete but not instantaneous is |
A. | Plsticity |
B. | Visco elasticity |
C. | An elasticity |
D. | Inelasticity |
E. | Elasticity |
Answer» C. An elasticity |
171. |
Cast irons are generally specified by |
A. | Hardness |
B. | Carbon percentage |
C. | Tensile strength |
D. | Iron percentage |
E. | Process of manufacture |
Answer» C. Tensile strength |
172. |
Identify the incorrect statement |
A. | Hot working performed on the metals is in a plastic state |
B. | Much greater pressures are needed for ot working than for cold working |
C. | When material is cold worked the resulting change in material shape brings about marked changes in the grain structure |
D. | Structural changes in cold working are grain fragmentation and lattice distortion |
E. | Residual stresses are set up in cold working |
Answer» B. Much greater pressures are needed for ot working than for cold working |
173. |
Galvanizing is generally done on |
A. | Low carbon steels |
B. | Cast iron |
C. | Non-ferrous metals |
D. | Non-metallic substances |
E. | None of the above |
Answer» A. Low carbon steels |
174. |
A Babitt is |
A. | A cutectic of iron and iron phosphide |
B. | A gadget for measuring volume |
C. | A measure of magnetic induction produced in a material |
D. | None of these |
E. | Antimony bearing lead or tin alloy |
Answer» A. A cutectic of iron and iron phosphide |
175. |
Which of the following colour of light has the least wavelength? |
A. | Violet |
B. | Green |
C. | Blue |
D. | Orange |
E. | Red |
Answer» A. Violet |
176. |
The process in which steel is heated 20? to 40?C below the lower critical temperature, held there for a prolonged period and then allowed to cool slowly in the furnace is known as |
A. | Annealing |
B. | Tempering |
C. | Normalising |
D. | Austempering |
E. | Spheroidising |
Answer» E. Spheroidising |
177. |
The fine grained steel |
A. | Are brittle |
B. | Are lighter |
C. | Are doctile |
D. | Have more tendency to distort |
E. | None of the above |
Answer» C. Are doctile |
178. |
An atom containing an odd number of electrons is said to be |
A. | Hypermagnetic |
B. | Paramgnetic |
C. | Ferromagnetic |
D. | Diamagnetic |
E. | Dielectric |
Answer» B. Paramgnetic |
179. |
For heavy loads in aircraft bearings the material used with lead to reduce the risk of scizure is |
A. | Silver |
B. | Copper |
C. | Iron |
D. | Tin |
E. | Zinc |
Answer» A. Silver |
180. |
The raw material for mini steel plants is |
A. | Iron ore |
B. | Pig iron |
C. | Grey iron |
D. | CI and steel scrap |
E. | None of the above |
Answer» D. CI and steel scrap |
181. |
Which type of electron pair exists in a semi-conductor? |
A. | Ionic |
B. | Non-ionic |
C. | Homopolr |
D. | Hetropolar |
E. | None of the above |
Answer» C. Homopolr |
182. |
A body which is permanently deformed is said to have undergone |
A. | Elastic deformation |
B. | Limit of elastic deformation |
C. | Uniform deformation |
D. | Non-uniform deformation |
E. | None of the above |
Answer» C. Uniform deformation |
183. |
In Charpy impact test, the specimen is held as a |
A. | cantilever |
B. | simply supported beam |
C. | fixed beam |
D. | hinged beam |
E. | None of the above |
Answer» B. simply supported beam |
184. |
Materials which lack permanent magnetic dipoles are called |
A. | diamagnetic |
B. | ferromagnetic |
C. | semi-magnetic |
D. | None of the above |
E. | None of the above |
Answer» A. diamagnetic |
185. |
The consitituent which has a powerful softening effect on cast iron and its presence in cast iron reduces the ability of the iron to retain carbon in chemical combination, is |
A. | Silicon |
B. | Carbon |
C. | Sulphur |
D. | Aluminium |
E. | Chromium |
Answer» A. Silicon |
186. |
Which of the following materials demonstrate viscoelastic behaviour? |
A. | Rubber |
B. | Glass |
C. | Plastics |
D. | Non-crystalline organic polymers |
E. | All of the above |
Answer» D. Non-crystalline organic polymers |
187. |
Carbon steel is |
A. | An alloy of carbon and iron with varying quantities of phosphorous |
B. | An alloy of carbon and iron obtained by oxidising excessive carbon from cast iron |
C. | An alloy of carbon and iron obtained by oxidising excessive carbon steel |
D. | An alloy of carbon generally obtained by adding graphite to low carbon steels |
E. | None of the above |
Answer» A. An alloy of carbon and iron with varying quantities of phosphorous |
188. |
A hydrogen atom has |
A. | Two electrons |
B. | No neutrons |
C. | No protons |
D. | One each electron, neutron and proton |
E. | None of the above |
Answer» B. No neutrons |
189. |
Which one is different from the others in press work |
A. | Tube forming |
B. | Embossing |
C. | Bulging |
D. | Cupping |
E. | Notching |
Answer» E. Notching |
190. |
Which of the following properties has lower value for copper as compared to aluminium? |
A. | Specific gravity |
B. | Melting point |
C. | Electrical resistivity |
D. | All of the above |
E. | None of the above |
Answer» C. Electrical resistivity |
191. |
A bearing alloy should have |
A. | High resistance to corrosion |
B. | Capacity to withstand shocks and vibrations |
C. | All above |
D. | Low coefficient of friction |
E. | High compressive strength |
Answer» C. All above |
192. |
When a loop composed of two dissimilar metals could be made to carry a continuous current simply by maintaining the two junctions at different temperatures, the above effect is known as |
A. | Thomson effect |
B. | Thompson effect |
C. | Peltier effect |
D. | Seeback effect |
E. | None of the above |
Answer» D. Seeback effect |
193. |
All of the following are point defects EXCEPT |
A. | vacancies |
B. | dislocations |
C. | interstitials |
D. | isolated impurities |
E. | None of the above |
Answer» B. dislocations |
194. |
The limiting load beyond which the material no longer behaves elastically is known is |
A. | Breaking load |
B. | Load bearing capacity |
C. | Limiting load |
D. | Plastic limit |
E. | Elastic limit |
Answer» E. Elastic limit |
195. |
When elastic limit is reached |
A. | Tensile strain decreases in proportion to stress |
B. | Tensile strain increases in proportion to stress |
C. | Tensile strain increases more quickly |
D. | Tensile strain decreases more quickly |
E. | None of the above |
Answer» A. Tensile strain decreases in proportion to stress |
196. |
In general, high cohesive forces are related to |
A. | Large values of elastic constants |
B. | Low melting point |
C. | Large coefficients of thermal expansion |
D. | Small value of elastic constants |
E. | None of the above |
Answer» A. Large values of elastic constants |
197. |
Hardness may be defined as resistance to |
A. | Local penetration |
B. | Machining |
C. | Wear |
D. | Scratching |
E. | Any of the above |
Answer» E. Any of the above |
198. |
The theory of failure which gives fairly good results for the ductile materials is |
A. | Hooke's law |
B. | Maximum shear stress theory |
C. | Maximum strain energy theory |
D. | Maximum principal stress theory |
E. | Maximum shear strain energy theory |
Answer» E. Maximum shear strain energy theory |
199. |
Which of the following factor has the least effect on the electrical conductivity of wires made of copper alloy? |
A. | Temperature |
B. | Alloying element |
C. | Vitrified clay |
D. | Method of forming the wire |
E. | Intensity of any incident light |
Answer» E. Intensity of any incident light |
200. |
Thermoplastic and thermoset polymers differ in |
A. | Glass transition temperature |
B. | Thermal behaviour |
C. | Mechanical behaviour |
D. | All of the above |
E. | Semi-conductors |
Answer» B. Thermal behaviour |
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