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Question
Free carbon in iron makes the metal
Options
A. soft and gives a coarse grained crystalline structure
B. soft and gives a fine grained crystalline structure
C. hard and gives a coarse grained crystalline structure
D. hard and gives a fine grained crystalline structure
Correct Answer
soft and gives a coarse grained crystalline structure
More questions
1. If a number of forces are acting at a point, their resultant is given by
Options
A. (?
V
)
2
+ (?
H
)
2
B.
C. (?
V
)
2
+(?
H
)
2
+2(?
V
)(?
H
)
D.
Show Answer
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Discuss
Correct Answer:
2. The wet bulb depression indicates __________ humidity of the air.
Options
A. absolute
B. relative
C. specific
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Correct Answer: relative
3. The work ratio of simple gas turbine cycle depends upon
Options
A. maximum cycle temperature
B. minimum cycle temperature
C. pressure ratio
D. all of these
Show Answer
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Discuss
Correct Answer: all of these
4. Nimonic contains __________ percentage of nickel as that of Inconel.
Options
A. same
B. less
C. more
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Correct Answer: same
5. The discharge through an external mouthpiece is given by (where
a
= Cross-sectional area of the mouthpiece, and
H
= Height of liquid above the mouthpiece)
Options
A. 0.855
a
2
gH
B. 1.855
aH
2
g
C. 1.585
a
2
gH
D. 5.85
aH
2
g
Show Answer
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Correct Answer: 0.855
a
2
gH
6. The factor considered for evaluation of machinability is
Options
A. cutting forces and power consumption
B. tool life
C. type of chips and shear angle
D. all of these
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Correct Answer: all of these
7. In an impulse turbine, the jet of water impinges on the bucket with a low velocity and after flowing over the vanes, leaves with a high velocity.
Options
A. True
B. False
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Correct Answer: False
8. The starting system includes
Options
A. a battery, a starter, and an ignition switch
B. a battery, a distributor, and an ignition switch
C. a battery, a starter, and a distributor
D. a distributor, a starter, and an ignition switch
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Correct Answer: a battery, a starter, and an ignition switch
9. The ratio of shear modulus to the modulus of elasticity for a Poisson's ratio of 0.4 will be
Options
A. 5/7
B. 7/5
C. 5/14
D. 14/5
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Correct Answer: 5/14
10. Brass is an alloy of
Options
A. copper and zinc
B. copper and tin
C. copper, tin and zinc
D. none of these
Show Answer
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Correct Answer: copper and zinc
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