Optical Engineering, Optomechanical Engineering MCQs (Chapterwise Multiple Choice Questions)

What is the fissionable material in nuclear reactors?

Uranium

Fuel rods

Thorium

Plutonium

Answer & Explanation

Correct Answer: Fuel rods

Note: This Question is unanswered, help us to find answer for this one

What is a fuel cell?

A device that uses solar panels to generate electricity

A device that converts chemical energy into electricity by way of an electrochemical reaction

A device that uses nuclear fission to generate electricity

A device that uses wind turbines to generate electricity

Answer & Explanation

Correct Answer: A device that converts chemical energy into electricity by way of an electrochemical reaction

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What causes heat to flow into or out of a system?

Work done on the system

Changing the volume of the system

The addition of or removal of matter from the system

A difference in temperature between the thermodynamic system and its surroundings

Answer & Explanation

Correct Answer: A difference in temperature between the thermodynamic system and its surroundings

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What is the First law of thermodynamics?

W = ΔU - q

ΔU = q + w

Q = ΔU - w

ΔT = q + w

Answer & Explanation

Correct Answer: ΔU = q + w

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What is the commercial method for producing aluminum?

Cementation process

Bayer process

Hall–Héroult process

Wöhler process

Answer & Explanation

Correct Answer: Hall–Héroult process

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What do the elements in any one column of the periodic table have in common?

They are all radioactive.

They are all nonmetals.

They all have the same number of valence electrons.

They are all gases at room temperature.

Answer & Explanation

Correct Answer: They all have the same number of valence electrons.

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What is the freezing point?

The temperature at which a pure liquid changes to a crystalline solid, or freezes.

The temperature at which a pure liquid changes to a crystalline gas.

The temperature at which a pure liquid changes to a crystalline solid and a pure gas.

The temperature at which a pure liquid changes to a crystalline liquid.

Answer & Explanation

Correct Answer: The temperature at which a pure liquid changes to a crystalline solid, or freezes.

Note: This Question is unanswered, help us to find answer for this one

What is the empirical formula of a substance?

All the atoms in the substance are the same

The heaviest element in the substance

The amount of each element in the substance

The formula of a substance written with the smallest integer (whole-number) subscripts.

Answer & Explanation

Correct Answer: The formula of a substance written with the smallest integer (whole-number) subscripts.

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What is one of two parts of an oxidation?reduction reaction?

Product

Oxidation state

Half-reaction

Reactant

Answer & Explanation

Correct Answer: Half-reaction

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Henderson-Hasselbalch equation is an equation relating pH of a buffer to what?

The temperature of the buffer

The weight of the buffer

The volume of the buffer

Concentrations of conjugate acid and base

Answer & Explanation

Correct Answer: Concentrations of conjugate acid and base

Note: This Question is unanswered, help us to find answer for this one

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