CHEMICAL ENGINEERING BASICS QUIZ

Which of the following welding processes employs the highest welding temperature ?

Gas welding

Thermit welding

Resistance welding

Arc welding

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For the same heat input & compression ratio, efficiency of Otto cycle is higher than that of diesel cycle, because in Otto cycle.

Expansion & compression are isentropic

Maximum temperature is higher

Combustion is at constant volume

Heat rejection is lower

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Tempering of a material does not improve its

Machinability

Softness

Internal stress level

Toughness

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Air standard Otto cycle is more efficient than the diesel cycle for the same

Compression ratio & pressure

Heat addition & pressure

Heat addition & compression ratio

Cylinder dimension & rpm

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Two wires of the same radius & material having length in the ratio of 1 : 2 are stretched by the same force. The strain produced in the two wires will be in the ratio of

0.042361111111111

0.084027777777778

0.043055555555556

0.044444444444444

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Notched bar test is used for testing the __________ of a material.

Impact strength

Corrosion resistance

Machinability

Endurance limit

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Specific __________ is a dimensionless quantity.

Weight

None of these

Humidity

Heat

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Sub zero treatment of steel is done to

Enhance its working performance in sub zero atmosphere

Induce temper brittleness after its hardening

Reduce the retained austenite in hardened steel

Suppress martensite transformation

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Hydrogen in liquid steels is dissolved

In the atomic form

In the ionic form

As tiny gas bubbles

In the molecular form

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Gantt charts are used for streamlining the

Inventory control

Sales forecasting

Quality control

Production schedule

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