A. Thoria
B. Glass
C. Ice
D. Pig iron
Related Mcqs:
- Hot dipping process is used for coating a low melting point metal (e.g. Pb, Sn, Zn) on iron, steel & copper having relatively higher melting points. Which of the following is not a hot dipping process ?
A. Galvanising
B. Tinning
C. Sherardizing
D. None of these - Melting point & boiling points of liquid oxygen are respectively – 218.8°C & – 183°C, while the same for liquid nitrogen is – 210°C & – 195.8°C respectively. The difference in melting points of liquid oxygen & liquid nitrogen is not equal to 8.8 ?
A. °C
B. °F
C. °K
D. °R - Which of the following low melting alloy containing bismuth and lead is used for electric fuse ?
A. Wood’s metal
B. Babbitt metal
C. Monel metal
D. Duralumin - Change in volume of metals from absolute zero temperature to their melting points is___________________?
A. Almost same for all metals
B. Different for different metals
C. Less for low melting point metals
D. Less for high melting point metals - While the recrystallisation temperature for pure metals is 0.3 Tm, the same for alloys is equal to ______________ × Tm (where, Tm Melting temperature) ?
A. 0.25
B. 0.45
C. 0.70
D. 0.95 - The atmospheric temperature during melting of ice/snow (in the atmosphere)_________________?
A. Decreases
B. Increases
C. Remain same
D. May increase or decrease; depends on the altitude where snow melts - Which of the following does not discharge the dust collected as a dry solid?
A. Electrostatic precipitator
B. Wet scrubber
C. Bag filter
D. Gravity settling chamber - Which of the following forces does not act on a fluid at rest ?
A. Viscous force
B. Gravity force
C. Hydrostatic force
D. Surface tension force - Which of the following materials does not form adherent oxide film on surface ?
A. Copper
B. Nickel
C. Aluminium
D. Gold & silver - Frother is added in the froth floatation cell used in ore beneficiation to stabilise the air bubbles (i.e., froth), which will hold the ore particles, but it does not affect the floatability of minerals. Which of the following is not used as a frother ?
A. Cresylic acid
B. Xanthaies
C. Pine oil
D. All A, B. & C.
