Metallurgical Engineering
GATE MT branch:mt PYQs
Build your understanding with focused practice from past exam papers.
Questions 451–460 of 650. Imported answers require independent review unless marked reviewed.
Question 51
Open questionMTNAT2 marksNeeds review
The steady state creep rate of a material increases by a factor of 20 when the temperature is increased from 890 K to 980 K. The creep rate at a temperature of ______ K (round off to the nearest integer) will be 5 times the creep rate at 890 K.
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Crack growth is being continuously measured in a test specimen subjected to constant amplitude cyclic stress with a mean stress of zero. The crack growth rate is related to the stress intensity range, ΔK as
where, a is the crack length and N is the number of cycles. When the crack length increases by a factor of two, the crack growth rate will increase by a factor of ______ (round off to one decimal place).
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In a top gated mold, liquid metal enters the mold cavity as a freely falling stream under gravity from a height of 0.5 m. Ignore the fluid friction due to viscosity and the drag due to changes in the direction of flow. If the volume of the mold cavity is 10 m
, then the time required to fill the mold is ______ s (round off to nearest integer).Given:
Acceleration due to gravity is 9.8 m s
.Cross-sectional area of gate is 0.2 m
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A Basic Oxygen Furnace operator, at the end of oxygen blow, measures the dissolved oxygen content in the steel as 0.03 wt.% and the steel temperature as 1800 K. The carbon content [C] in the steel is ______ wt.% (round off to two decimal places).
Assume:
Equilibrium between dissolved carbon [C], dissolved oxygen [O], and CO (gas) at 1 atmosphere.
Henry’s law is valid for both [C] and [O]
Given:
[ C ]
+ [ O ]
→ (CO)
R = 8.314 J·mol
·K
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M and N are
matrices. If the det(M) is −9 and the det(N) is −14, then the det(NM) is ______ (round off to the nearest integer).Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 1
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The fishermen, ______ the flood victims owed their lives, were rewarded by the government.
Your answerChoose one option.
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Some students were not involved in the strike.
If the above statement is true, which of the following conclusions is/are logically necessary?
Some who were involved in the strike were students.
No student was involved in the strike.
At least one student was involved in the strike.
Some who were not involved in the strike were students.
Your answerChoose one option.
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The radius as well as the height of a circular cone increases by 10%. The percentage increase in its volume is ______.
Your answerChoose one option.
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Open questionGAMCQ1 markNeeds review
Five numbers 10, 7, 5, 4 and 2 are to be arranged in a sequence from left to right following the directions given below:
No two odd or even numbers are next to each other.
The second number from the left is exactly half of the left-most number.
The middle number is exactly twice the right-most number.
Which is the second number from the right?
Your answerChoose one option.
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Open questionGAMCQ1 markNeeds review
Until Iran came along, India had never been ________________ in kabaddi.
Your answerChoose one option.
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