A. 3.8
B. 4
C. 4.3
D. 4.6
✅ The correct answer is option C.
Chemical Engineering MCQs
Air-petrol ratio for maximum power generation in spark ignition engine is about
A. 6:1
B. 12 : 1
C. 18 : 1
D. 24 : 1
✅ The correct answer is option B.
Surface finish of casting does not depend upon the
A. Sand fineness
B. Pattern finish
C. Mould dressings
D. Metal temperature
✅ The correct answer is option D.
Lubricants can be used to
A. Transmit power hydraulically
B. Form a seal in compressors
C. Remove contaminants by flushing and to insulate transformers, switchgears etc
D. All of the above
✅ The correct answer is option D.
High endurance limit of carburised machine parts is because of the fact that carburisation
A. Suppresses any stress concentration produced in the parts
B. Enhances the yield point of the material
C. Introduces a compressive layer on the surface
D. Produces a better surface finish
✅ The correct answer is option C.
The maximum thickness of the metal which can be welded using ultrasonic welding is __________ mm.
A. 0.5
B. 3
C. 10
D. 25
✅ The correct answer is option B.
Shock resisting steels should possess high
A. Hardness
B. Toughness
C. Tensile strength
D. Wear resistance
✅ The correct answer is option C.
Heating of ferromagnetic materials to a temperature above Curie temperature makes it
A. Insulator for heat & electricity transmission
B. Ferritic
C. Behave like paramagnetic materials
D. Superconductor
✅ The correct answer is option C.
Exposure to __________ accelarates the degradation of plastics.
A. Ultraviolet radiation
B. High atmospheric temperature
C. High ambient temperature
D. Damp atmosphere
✅ The correct answer is option A.
L.D. converters are generally lined with
A. Magnesite
B. Fireclay
C. Chrome magnesite
D. Silica
✅ The correct answer is option C.