MCQOPTIONS
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MCQOPTIONS
This section includes 8247 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 7101. |
Laser is a device to produce |
| A. | gamma rays. |
| B. | microwaves. |
| C. | a beam of white light. |
| D. | a beam of coherent light. |
| Answer» E. | |
| 7102. |
Addition of small amount of __________ to grey cast iron is done to produce nodular grey cast iron. |
| A. | manganese |
| B. | phosphorous |
| C. | magnesium |
| D. | chromium |
| Answer» D. chromium | |
| 7103. |
Minimum thermal efficiency of a steam boiler may be around __________ percent |
| A. | 25 |
| B. | 45 |
| C. | 65 |
| D. | 20 |
| Answer» E. | |
| 7104. |
The temperature at which the magnetic property of iron disappears (i.e., it becomes non-magnetic) and its electrical conductivity & specific heat also changes, is called the 'Curie point', which is __________ C. |
| A. | 768 |
| B. | 908 |
| C. | 1400 |
| D. | 1539 |
| Answer» B. 908 | |
| 7105. |
Fatigue limit improvement by over stressing the metal by successively increasing the load is called coaxing. In fatigue failure, the material fails |
| A. | below the yield point. |
| B. | above the yield point. |
| C. | below the elastic limit. |
| D. | at the elastic limit. |
| Answer» B. above the yield point. | |
| 7106. |
The most serious manufacturing defect from fracture toughness point of view is |
| A. | surface roughness |
| B. | pores |
| C. | spherical inclusion |
| D. | crack |
| Answer» E. | |
| 7107. |
Leakage in a cooking gas cylinder is detected by |
| A. | radio-isotopes. |
| B. | pouring soap solution on the surface and locating the gas bubbles. |
| C. | halide torch. |
| D. | pungent smell of mercaptans present in the gas. |
| Answer» E. | |
| 7108. |
Which of the following is the most wear resistant grade of carbide used for the cutting tools? |
| A. | Aluminium carbide |
| B. | Tungsten carbide |
| C. | Nickel carbide |
| D. | Iron carbide |
| Answer» C. Nickel carbide | |
| 7109. |
On-off control |
| A. | fully opens the final control element, when the measured variable is below the set point. |
| B. | fully closes the final control element, when the measured variable is above the set point. |
| C. | is a two position control (fully open or fully closed) control adequate to control a process with slow reaction and minimum dead time or transfer lag. |
| D. | none of these. |
| Answer» D. none of these. | |
| 7110. |
The tensile load-elongation curve of a metal does not describe |
| A. | work hardening |
| B. | yield stress |
| C. | anisotropy index |
| D. | necking strain |
| Answer» D. necking strain | |
| 7111. |
Usual value of the resistance suitable for a wire resistance strain gauge is __________ ohms. |
| A. | 20 |
| B. | 80 |
| C. | 120 |
| D. | 500 |
| Answer» D. 500 | |
| 7112. |
Permanent set in a material is produced by subjecting it to |
| A. | triaxial loading. |
| B. | fatigue loading. |
| C. | stresses beyond the elastic limit. |
| D. | tensile & compressive loads simultaneously. |
| Answer» D. tensile & compressive loads simultaneously. | |
| 7113. |
The following is a typical anionic collector used in flotation. |
| A. | Ethyl dixanthogen. |
| B. | Trimethyl cetyl ammonium bromide. |
| C. | Potassium ethyl xanthate. |
| D. | lAuryl amine hydrochloride. |
| Answer» D. lAuryl amine hydrochloride. | |
| 7114. |
Kinematic viscosity of water as compared to that of air is |
| A. | more |
| B. | same |
| C. | 15% more |
| D. | 15% less |
| Answer» E. | |
| 7115. |
Which of the following is the most suitable for removing fine particles (< 1 micron diameter) from air below its dew point ? |
| A. | Venturi scrubber |
| B. | Electrostatic precipitator |
| C. | Cyclone separator |
| D. | Fabric filter |
| Answer» C. Cyclone separator | |
| 7116. |
Which of the following is the terminology used for the temperature at which the phase changes occur in a metal ? |
| A. | Critical temperature. |
| B. | Recrystallisation temperature. |
| C. | Phase transformation temperature. |
| D. | Transition temperature. |
| Answer» B. Recrystallisation temperature. | |
| 7117. |
Puddling process is used for converting pig iron into |
| A. | cast iron |
| B. | wrought iron |
| C. | mild steel |
| D. | semi-steel |
| Answer» D. semi-steel | |
| 7118. |
Addition of __________ in steel can help in increasing the depth of hardness. |
| A. | nickel |
| B. | chromium |
| C. | vanadium |
| D. | tungsten |
| Answer» D. tungsten | |
| 7119. |
Feed check valve is used in steam boilers to |
| A. | check the water level in the boiler. |
| B. | check the feed water flow rate. |
| C. | feed high pressure water to boiler and guard against its backflow through it. |
| D. | none of these. |
| Answer» D. none of these. | |
| 7120. |
Swaging is a/an __________ operation. |
| A. | piercing |
| B. | forging |
| C. | extrusion |
| D. | drawing |
| Answer» C. extrusion | |
| 7121. |
Pig iron is |
| A. | made from cast iron. |
| B. | made from wrought iron. |
| C. | the one, which comes out of the blast furnace. |
| D. | free from impurities. |
| Answer» D. free from impurities. | |
| 7122. |
Classification of metal forming processes into hot and cold working is based on the following parameters. |
| A. | Stacking fault energy. |
| B. | Recrystallisation temperature. |
| C. | Solidus temperature. |
| D. | Transformation temperature. |
| Answer» C. Solidus temperature. | |
| 7123. |
The function of a nozzle provided in steam turbine is to |
| A. | throttle down (i.e., reduce) the pressure of steam. |
| B. | convert internal energy into kinetic energy. |
| C. | increase the velocity of steam. |
| D. | all (a), (b) & (c). |
| Answer» E. | |
| 7124. |
Which of the following polymers is obtained by copolymerisation of three monomers ? |
| A. | SAN |
| B. | ABS |
| C. | SBR |
| D. | PTFE |
| Answer» C. SBR | |
| 7125. |
Silicon percentage in the silicon steel used for electrical appliances/equipments is |
| A. | 0.3-0.4 |
| B. | 12-14 |
| C. | 3-4 |
| D. | 20-25 |
| Answer» D. 20-25 | |
| 7126. |
Material of construction of foundary crucible is |
| A. | graphite |
| B. | lead |
| C. | porcelain |
| D. | stainless steel |
| Answer» B. lead | |
| 7127. |
Machinability of hard alloys & tool steels is improved by |
| A. | spherodising |
| B. | annealing |
| C. | tempering |
| D. | normalising |
| Answer» C. tempering | |
| 7128. |
LASER |
| A. | stands for Light Amplification by Stimulated Emission of Radiation. |
| B. | has the same intensity as visible light. |
| C. | can't be used for cutting metals. |
| D. | none of these. |
| Answer» B. has the same intensity as visible light. | |
| 7129. |
__________ forces do not act in case of fluids. |
| A. | Vibratory |
| B. | Centrifugal |
| C. | Elastic |
| D. | Tensile |
| Answer» E. | |
| 7130. |
Which of the following is not a natural abrasive ? |
| A. | Silicon carbide |
| B. | Quartz |
| C. | Corundum |
| D. | Emery |
| Answer» B. Quartz | |
| 7131. |
Springback in sheet metal bending depends on the |
| A. | elastic limit |
| B. | bend radius |
| C. | degree of bend |
| D. | thickness of sheet |
| Answer» E. | |
| 7132. |
The most important consideration in value engineering is the |
| A. | profit maximisation. |
| B. | customer satisfaction. |
| C. | cost reduction. |
| D. | process improvement. |
| Answer» C. cost reduction. | |
| 7133. |
Lime contains about 90% CaO. Percentage CaO present in limestone is about |
| A. | 25 |
| B. | 50 |
| C. | 70 |
| D. | 80 |
| Answer» C. 70 | |
| 7134. |
The most important material handling system in an integrated steel plant is the |
| A. | belt conveyor |
| B. | diesel locomotive |
| C. | truck |
| D. | overhead hoists & cranes |
| Answer» C. truck | |
| 7135. |
Property of a material to resist a tensile force without giving away is a measure of its |
| A. | stiffness |
| B. | toughness |
| C. | resilience |
| D. | tenacity |
| Answer» E. | |
| 7136. |
Cast iron has the unique property of high |
| A. | ductility |
| B. | damping characteristics |
| C. | hardness |
| D. | malleability |
| Answer» C. hardness | |
| 7137. |
The ultimate strength in tension for steel is __________ times the ultimate strength in shear. |
| A. | 0.5 |
| B. | 0.9 |
| C. | 1.5 |
| D. | 2.5 |
| Answer» D. 2.5 | |
| 7138. |
The activity of pure hydrogen gas at 1000 C and 5 atm pressure |
| A. | is always less than 1. |
| B. | is always greater than 1. |
| C. | can be 5. |
| D. | depends on the choice of the standard state. |
| Answer» E. | |
| 7139. |
Which of the following transducers is most commonly used for the measurement of shock and vibration ? |
| A. | Linear variable differential transducer (LVDT) |
| B. | Dial gauge |
| C. | Accelerometer |
| D. | none of these |
| Answer» D. none of these | |
| 7140. |
The power of a low capacity prime mover is most suitably measured by a __________ type dynamometer. |
| A. | driving |
| B. | transmission |
| C. | absorption |
| D. | none of these |
| Answer» D. none of these | |
| 7141. |
__________ addition increases the depth of hardness of steel. |
| A. | Chromium |
| B. | Nickel |
| C. | Tungsten |
| D. | Vanadium |
| Answer» B. Nickel | |
| 7142. |
The yield point in fatigue loading compared to that in static loading is less. The ratio of ultimate tensile strength to endurance limit of a material subjected to fatigue loading is |
| A. | 0.5 |
| B. | 1 |
| C. | 1.5 |
| D. | 2 |
| Answer» E. | |
| 7143. |
Which of the following is not used as a fuel in rocket propellaht ? |
| A. | Liquid hydrogen |
| B. | Liquid oxygen |
| C. | Liquid hydrazine |
| D. | Kerosene oil |
| Answer» C. Liquid hydrazine | |
| 7144. |
Hypo (sodium thiosulphate) because of its complex forming behaviour is used in photography to remove undecomposed silver bromide as a soluble complex for __________ of the picture. |
| A. | printing |
| B. | developing |
| C. | colour |
| D. | fixation |
| Answer» C. colour | |
| 7145. |
Steels with high carbon equivalent have poor weldability, because in these steels during welding |
| A. | carbon and other alloying elements get oxidised from the weld pool. |
| B. | excessive ferrite forms in the heat affected zone leading to poor toughness of the weld. |
| C. | martensite forms in the heat affected zone leading to poor toughness/ductility of the weld. |
| D. | segregation of carbon and other element occurs in the weld pool leading to poor properties of the weld. |
| Answer» D. segregation of carbon and other element occurs in the weld pool leading to poor properties of the weld. | |
| 7146. |
If the pH value of a solution of sodium chloride is 7; then what will be the pH value of the solution after its electrolysis ? |
| A. | 7 |
| B. | < 7 |
| C. | > 7 |
| D. | 0 |
| Answer» D. 0 | |
| 7147. |
Measurement of the area of the indented surface is not involved in the __________ hardhes testing method. |
| A. | Vicker's |
| B. | Rockwell |
| C. | Knoop |
| D. | Brinell |
| Answer» C. Knoop | |
| 7148. |
Super conduction in metals is observed at a temperature of __________ K. |
| A. | <100 |
| B. | >100 |
| C. | about 273 |
| D. | about 373 |
| Answer» C. about 273 | |
| 7149. |
The ratio of mass of a neutron to that of an electron is about 1839. What is the ratio of the mass of a proton to that of an electron? |
| A. | 159 |
| B. | 1837 |
| C. | 2537 |
| D. | 10000 |
| Answer» C. 2537 | |
| 7150. |
Co-efficient of performance of a Carnot cycle refrigerator operating between - 23 C and + 27 C is |
| A. | 3 |
| B. | 5 |
| C. | 0.5 |
| D. | 1.5 |
| Answer» C. 0.5 | |