Chemical Engineering Basics

631. The material used for coating the welding electrode is termed as the

1. Flux
2. Slag
3. Protective layer
4. Binder

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632. The materials which fracture even at small strains are termed as brittle, while those materials which exhibit an appreciable deformation before failure are termed as

1. Rigid
2. Tough
3. Ductile
4. Plastic

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633. The maximum stress below which a material can withstand an infinite number of cycle of stress, is termed as the

1. Fatigue strength
2. Creep strength
3. Resilience
4. Endurance limit

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634. The maximum thickness of the metal which can be welded using ultrasonic welding is __________ mm.

1. 0.5
2. 3
3. 10
4. 25

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635. The mechanism involved in the removal of metal in drilling operation is by

1. Compression
2. Extrusion
3. Shearing
4. Both 'b' & 'c'

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636. The mechanism which changes the value of manipulated variable in response to the output signal from the control unit is called the

1. Final control element
2. On-off control
3. Floating control action
4. None of these

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637. The minimum and the maximum number of members required to form a Private Limited Joint Stock Company are respectively

1. 7 and 30
2. 10 and 50
3. 2 and 50
4. 13 and 55

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638. The minimum carbon content in steel should be __________ percent for it to respond to a hardening treatment.

1. 0.2
2. 0.4
3. 0.6
4. 0.8

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639. The minimum temperature to which the water can be cooled in a cooling tower is the __________ temperature of air.

1. Ambient
2. Dry bulb
3. Dew point
4. Wet bulb

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640. The most abundant metal present in the earth's crust is;

1. Iron
2. Copper
3. Titanium
4. Aluminium

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