A. CaF2
B. Ca3(PO4)2
C. CaCO3
D. CaCl2
Related Mcqs:
- Main constituent of bone ash is____________________?
A. Ammonium phosphate
B. Calcium phosphate
C. Animal charcoal
D. Ammonium sulphate - Chlorine acts as a bleaching agent only in the presence of ______________________?
A. Dry air
B. Pure oxygen
C. Moisture
D. Sunlight - In practice, the compression ratio of compression-ignition (CI) engine ranges from ______________________?
A. 15 to 25
B. 5 to 10
C. 40 to 55
D. 60 to 70 - To counteract the bad effects of strain hardening on a cold formed part, it must be ______________________?
A. Tempered
B. Normalised
C. Annealed
D. Hardened - Metal shots used in shot blasting are made of ______________________?
A. Stellite
B. Steel
C. Bronze
D. Lead - Recrystallisation temperature of steel is ______________________ °C?
A. 50
B. 300
C. 500
D. 800 - ______________________ temperature remains constant during adiabatic saturation process of unsaturated air ?
A. Dew point
B. Dry bulb
C. Wet bulb
D. None of these - ______________________ iron is produced by the annealing of white cast iron?
A. Malleable
B. Nodular
C. Ductile
D. Grey - Transformer cores are normally made from ______________________?
A. Soft ferrites
B. High purity iron
C. Grain oriented Fe-Si alloy
D. Al-Ni-Co alloy - Function of fusible plug in a boiler is to ______________________?
A. Drain out water and sludge from the boiler during repair
B. Put off fire in the furnace when water level in the boiler falls to unsafe limit
C. Guard the boiler in case of abnormal rise in steam pressure
D. All A, B. & C
