McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Mechanical Engineering .
| 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 | |
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