Chemical Engineering - Chemical Engineering Basics

1. 

Addition of __________ to steel does not impart hardness.

A. nickel
B. copper
C. chromium
D. silicon

Answer: Option B

Explanation:

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2. 

For a spontaneous natural process at constant temperature and pressure, the free energy of the system always

A. increases.
B. decreases.
C. remains constant.
D. increases to a maximum before decreasing.

Answer: Option A

Explanation:

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3. 

Inertial forces are obtained, when the elastic forces are multiplied by __________ number.

A. Mach
B. Froude
C. Reynolds
D. Euler

Answer: Option A

Explanation:

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4. 

Temperature of hot gases flowing in a pipe is measured by a thermocouple inserted in the thermal well. The thermal well made of __________ will facilitate the most accurate measurement of the temperature.

A. copper
B. steel
C. aluminium
D. brass

Answer: Option A

Explanation:

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5. 

Wavelength of radiation emitted by a body depends on the __________ of its surface.

A. temperature
B. area
C. nature
D. all 'a', 'b' & 'c'

Answer: Option A

Explanation:

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