A. Helium
B. Oxygen
C. Carbon dioxide
D. None of these
Correct Answer: Carbon dioxide ✔
Last Updated: February 11, 2019
Related MCQs
- Cold heading or upsetting is categorised as the __________ process ?
- The fugacity of liquid water at 298 K is approximately 3171 Pa. Considering the ideal heat of vaporisation as 43723 J/gm.mole, its fugacity at 300 K would be__________?
- The most abundant metal present in the earth’s crust is__________?
- A material being tested for endurance strength is subjected to the __________ load ?
- Notched bar test is used for testing the __________ of a material?
- The unit of gc is __________?
- One of the methods of purification of leach liquor is ion exchange, which involves__________?
- Thermal equivalent of electrical power in practical calculation is __________ kcal/kWh ?
- Silicon percentage in acid resistant cast iron is about __________?
- The atmospheric temperature during melting of ice/snow (in the atmosphere)__________?
- __________ is not a case hardening process ?
- Calorific value of __________ are almost same?
- Identify the correct statement with reference to the extractive metallurgy of aluminium ?
- The main charge in blast furnace is usually__________?
- Speed of a submarine in deep sea & that of an aeroplane is measured by a/an__________?
- Maximum change in the hardness of martensite occurs in the carbon content range of __________ percent in steel?
- In a drilling process, the metal is removed by both shearing & extrusion. General purpose drills are made of__________?
- Removal of non-condensable from steam or other vapour is termed as the __________ process?
- __________ cannot increase the fatigue strength of a material?
- Production of a hollow product by inflation of a tube or parison is called the __________ process?
- Coarse grained steels have__________?
- Unbreakable crockeries are made from __________ polymers?
- A form of stress corrosion failure termed as ‘season cracking’ is generally observed in __________?
- Velocity of a gas in sound is not proportional to (where, T = Absolute temperature of the gas. P = Absolute pressure of the gas. y = Ratio of specific heats (Cp/Cv) ρ = specific weight of the gas) ?
- Hot & cold working of material causes its __________ deformation?
- Thermit welding is categorised as the __________ welding ?
- Work hardenable alloy steel used to make the bucket wheel excavators, blades of bulldozers and other earth moving equipments contain iron, carbon and __________?
- As per the Indian boiler regulation (IBR), the type of joint preferred for the circumferential joint is the __________ joint ?
- Often earing defects are found during deep drawing operation, because the __________?
- Plants produce carbohydrates from the CO2 present in the atmosphere by__________?
- . The effect of friction on the flow of steam through a nozzle is to decrease the __________ of steam?
- __________ is not a heat treatment process ?
- __________ is not used as the control rod material in a nuclear reactor ?
- Which of the following can be manufactured using powder metallurgy techniques ?
- Pick out the wrong statement about nucleate boiling ?
- Latent heat of dry steam at atmospheric pressure is 539 Kcal/kg; which __________ with increase in the pressure of steam?
- With increasing carbon percent in steel beyond 0.8%, its ultimate tensile strength (UTS) and __________ is not affected ?
- The bank of tubes located at the back of the domestic refrigerators are the __________ tubes?
- Mho’s scale of hardness, which consists of 10 standard minerals is used for the measurement of __________ hardness?
- Electrometallurgy is not involved in the extraction of __________ from its ore?
- Screws are specified by their __________ diameters?
- Cupola produces __________ iron?
- A semi-conductor is damaged & behaves like a conductor, on passing a strong electric current through it, because it heats up the crystals & breaks the covalent bonds resulting in __________ electrons ?
- In a furnace with heating element temperature at 1700°C, the dominant mechanism of heat transfer will be__________?
- Pick out the wrong statement about coating/electroplating of metals ?
- Nusselt number/Biot number varies__________?
- Hooke’s law__________?
- In case of a, centrifugal pump, the ratio h1/h2 is termed as the __________ efficiency (where, h1 = actual measured head & h2 = head imparted to the fluid by impeller)?
- Increase in temperature, in general results in the__________?
- Which of the following fastening devices has its both ends threaded ?
- Dryness fraction of dry steam is__________?