Chemical Engineering - Chemical Engineering Basics

31.
In extrusion of metals, which of the following statement is true ?
speed of the extruded material is same as that of ram speed.
Redundant work is a function of the die angle.
Relative motion between the billet surface and the container wall is always present.
Hollow ram is used for indirect extrusion.
Answer: Option
Explanation:
No answer description is available. Let's discuss.

32.
Nuclear fission of one atom of uranium-235 produces the energy equivalent to about __________ MeV.
20
200
500
1000
Answer: Option
Explanation:
No answer description is available. Let's discuss.

33.
Which of the following parameters is not responsible for the heat loss from a hot steam carrying bare pipe surface located in a room without fans ?
Emissivity of pipe surface.
Diameter & length of the pipe.
Temperature of hot pipe surface & that of air in the room.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.

34.
Machinability of hard alloys and tool steels is improved by
spherodising
annealing
tempering
normalising
Answer: Option
Explanation:
No answer description is available. Let's discuss.

35.
Transformation range for ferrous material is the temperature interval during which __________ is formed during its heating.
cementite
austenite
martensite
pearlite
Answer: Option
Explanation:
No answer description is available. Let's discuss.