A. As tiny gas bubbles
B. In the atomic form
C. In the ionic form
D. In the molecular form
Related Mcqs:
- Steels with high carbon equivalent have poor Weldability, because in these steels during welding________________?
A. Carbon and other alloying elements get oxidised from the weld pool
B. Excessive ferrite forms in the heat affected zone leading to poor toughness of the weld
C. Martensite forms in the heat affected zone leading to poor toughness/ductility of the weld
D. Segregation of carbon and other element occurs in the weld pool leading to poor properties of
the weld - 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 - Machinability of hard alloys and tool steels is improved by_____________________?
A. Spheroidising
B. Annealing
C. Tempering
D. Normalising - Heating the Hypo-eutectoid steels to 30°C above the upper critical temperature line, soaking at that temperature and then cooling slowly to the room temperature to form a pearlite & ferrite structure is called_______________________?
A. Tempering
B. Hardening
C. Annealing
D. Normalising - Fine grained steels have____________________?
A. High brittleness
B. Higher tendency to distort
C. High ductility
D. None of these - Most important property of steels for use in automobile bodies is the___________________?
A. Formability
B. Yield strength
C. Toughness
D. Resilience - Earing is a defect found in steels after the following metal working operation ?
A. Extrusion
B. Rolling
C. Deep drawing
D. Wire drawing - Coarse grained steels have____________________?
A. Low toughness
B. No tendency to distort
C. High density
D. Very high toughness - Absolute zero, pressure will occur, when the molecular momentum of the system becomes zero. A liquid will cease to exist as liquid at________________?
A. High vacuum
B. Zero pressure
C. 0°K
D. Earth’s centre - Hydrogen can be ________________?
A. Used in I.C. engines as fuel
B. Liquefied & stored under cryogenic conditions
C. Produced by electrolysis of water
D. All (A), B. & C.
