A. Sulphur
B. Silicon
C. Lead
D. Phosphorous
Correct Answer: Silicon ✔
Last Updated: February 11, 2019
Related MCQs
- In electrical resistance welding, distortion results from the use of improper__________?
- __________ can replace tungsten in high speed steel ?
- Multistage compression of air as compared to single stage compression offers the advantage of__________?
- The cathode in an electrochemical cell always carries__________?
- Which of the following relationships is correct for relating the three elastic constants of an isotropic elastic material (where, E = Young’s modulus, G = Modulus of rigidity or shear modulus v = Poisson’s ratio) ?
- Cold chisel & hammers are made of__________?
- Dislocation cross-slip is difficult in those materials, which have__________?
- In a counter flow heat exchanger, hot fluid enters at 170°C & leaves at 150°C, while the cold fluid enters at 50°C & leaves at 70°C. The arithmetic mean temperature difference in this case is __________ °C?
- For a small scale toy factory, the fixed cost per month is Rs. 5000/-. The variable cost per toy is Rs. 20 and sales price is Rs. 30 per toy. The break even production per month will be __________ toys ?
- A solid aluminium ball, when quenched in a water bath maintained at 40°C, cools down from 550°C to 450°C in 20 seconds. The expected temperature of the ball after next 20 seconds may be about __________ °C?
- Spark plug is provided in a/an__________?
- Pick out the correct statement about the condensation?
- Pick out the correct statement?
- Pick out the wrong statement ?
- Pick out the wrong statement ?
- Pick out the wrong statement ?
- Pick out the wrong statement ?
- Pick out the wrong statement?
- Pick out the wrong statement about the machinability of metals. Machinability of a metal ?
- Increasing the carbon content of steel__________?
- The ‘transition temperature’ for ductile to brittle behavior of steel increases with increase in the __________ content in steel?
- Pipelines carrying various utilities in chemical industries are identified by their colour codes. The color of pipeline carrying steam is__________?
- Out of the following, the most malleable material is__________?
- Steel rods are normally used for concrete reinforcement because concrete and steel have almost equal__________?
- While the oxy-acetylene flame produces a temperature of 3200°C, the temperature produced by oxy-hydrogen flame is about __________ °C ?
- Oxyacetylene reducing flame is used while carrying out welding on__________?
- Adhesives__________?
- Name the safety device used to protect the boiler, when the water level falls below a minimum level ?
- __________ rubber is generally used for making ‘O’ rings used for vacuum sealings?
- A fluid is termed as the Newtonian fluid, when the shear stress is __________ the velocity gradient ?
- Earing is a defect found in steels after the following metal working operation ?
- Routing in production, planning & control is concerned with the__________?
- Steel & cast iron pipes are produced by __________ casting ?
- Magnesium is present in__________?
- All the atoms of the world comprise of electrons, proton & neutron except that of __________ atom in which neutron is absent ?
- Highest cutting speed is achieved by the __________ tool material ?
- Which of the following materials has the poorest electrical conductivity ?
- For an ideal gas, Cp – Cv is__________?
- Viscoelastic behaviour is observed in __________ materials?
- Load cells used for the measurement of weight has__________?
- The order of a chemical reaction__________?
- With increase in temperature, the electrical conductivity of a __________ decreases ?
- Which of the following if present in iron ore, enhances its value ?
- Out of the following the refractive index is the highest for__________?
- In a good rimming steel__________?
- Volumetric composition of flue gas analysed with the Orsat apparatus is : CO2 = 12%, O2 = 8%, CO = nil, N2 = 80%. This flue gas composition indicates that__________?
- __________ furnace is generally used in the non-ferrous foundries ?
- The amount of different substances produced, when the same quantity of electricity is passed through different solutions are proportional to their__________?
- Most of the phosphorous present in the blast furnace burden enters into__________?
- Density in the solid state is slightly less than that in its liquid state, in case of__________?
- Starting friction is low in case of the __________ lubrication?