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Question
In a unit cell of a body centred cubic space lattice, there are __________ atoms.
Options
A. six
B. nine
C. fourteen
D. seventeen
Correct Answer
nine
More questions
1. The flow in a pipe or channel is said to be non-uniform when
Options
A. the liquid particles at all sections have the same velocities
B. the liquid particles at different sections have different velocities
C. the quantity of liquid flowing per second is constant
D. each liquid particle has a definite path
Show Answer
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Correct Answer: the liquid particles at different sections have different velocities
2. In water tube boilers
Options
A. water passes through the tubes which are surrounded by flames and hot gases
B. the flames and hot gases pass through the tubes which are surrounded by water
C. forced circulation takes place
D. none of these
Show Answer
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Correct Answer: water passes through the tubes which are surrounded by flames and hot gases
3. The cutting speed is maximum while machining __________ with a high speed steel tool.
Options
A. cast iron
B. mild steel
C. brass
D. aluminium
Show Answer
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Correct Answer: aluminium
4. The lip clearance angle is the angle formed by the
Options
A. leading edge of the land with a plane having the axis of the drill
B. flank and a plane at right angles to the drill axis
C. chisel edge and the lip as viewed from the end of a drill
D. none of the above
Show Answer
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Correct Answer: flank and a plane at right angles to the drill axis
5. The obtuse angle, included between the chisel edge and the lip as viewed from the end of a drill, is called
Options
A. helix or rake angle
B. point angle
C. chisel edge angle
D. lip clearance angle
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Correct Answer: chisel edge angle
6. The carbide tools operating at very low cutting speeds (below 30 m/min)
Options
A. reduces tool life
B. increases tool life
C. have no effect on tool life
D. spoils the work piece
Show Answer
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Correct Answer: reduces tool life
7. Which of the following parameters govern the value of shear angle in continuous chip formation?
Options
A. True feed
B. Chip thickness
C. Rake angle of the cutting tool
D. all of these
Show Answer
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Correct Answer: all of these
8. If
u
1
and
u
2
are the velocities of two moving bodies in the same direction before impact and
v
1
and
v
2
are their velocities after impact, then coefficient of restitution is given by
Options
A.
B.
C.
D.
Show Answer
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Correct Answer:
9. The heat transfer by conduction through a thick sphere is given by
Options
A.
B.
C.
D.
Show Answer
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Correct Answer:
10. Nusselt number (
N
N
) is given by
Options
A.
B.
C.
D.
Show Answer
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Discuss
Correct Answer:
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