A. Carbon monoxide
B. Carbon dioxide
C. Nitrogen
D. Ozone
Related Mcqs:
- Which of the following gives the correct sequence of flow of the flue gases through the above mentioned boiler accessories ?
A. A, C, B, D
B. D, B, C, A
C. D, C, B, A
D. D, A, B, C - The value of y = cp/cv. at < 500°C for air & most common gases can be safely assumed to be_____________________?
A. 0.8
B. 1
C. 1.4
D. 1.8 - The same volume of all gases is representative of their_____________________?
A. Specific gravities
B. Densities
C. Gas characteristic constants
D. Molecular weights - Temperature of hot gases flowing in a pipe is measured by a thermocouple inserted in the thermal well. The thermal well made of ______________ will facilitate the most accurate measurement of the temperature ?
A. Copper
B. Steel
C. Aluminium
D. Brass - For which pair of the fuel gases, calorific value (C.V.) of one fuel is almost double that of the other on volume basis (i.e., kcal/Nm3) while the C.V. is same on weight basis (i.e., kcal/kg) ?
A. Propane and acetylene
B. Propane and LPG
C. Sewage gas and gobar gas
D. B.F gas and coke oven gas - Solute atoms which cause yield point phenomenon in mild steel are/is_________________?
A. Aluminium
B. Boron
C. Carbon
D. Nitrogen - The most prominent single cause of corrosion in boiler-tubes, drums, economisers and steam superheaters in a thermal power plant boiler is the_______________?
A. Water alkalinity & leakage
B. Hydrazine addition during feed water treatment
C. Release of non-condensable gas from water in the boiler
D. Scale formation - Which of the following is not categorised as the ore agglomeration process ?
A. Nodulising
B. Pelletising
C. Balling
D. Briquetting - In the formation of cermets, the ratio of ceramic material to metallic material is usually 80:20. Which of the following is a cermet ?
A. Zirconia
B. Alumina
C. Bakelite
D. Tungsten carbide - Out of the following, the lowest packing of atoms exists in ____________________ crystal lattice structure?
A. Hexagonal close, packed (hcp)
B. Face centred cubic (fcc)
C. Body centred cubic (bcc)
D. Simple cubic
