GATE MT 2020 Paper 1 — page 21

Questions 61–63 of 65. Imported answers require review unless explicitly marked reviewed.

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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2020 · Paper 1

Question 51

Question 52

Question 53