Chemical Engineering Basics

781. Which of the following is an undesirable property of slag produced during the Pyrometallurgical method of metal extraction from its ore?

1. High fusibility & fluidity
2. High thermal conductivity
3. Low density
4. High chemical activity

View answer

782. Which of the following is normally not found in both the S.I. (petrol) & C.I. (diesel) engines?

1. Air filter
2. Fuel injector
3. Exhaust silencer
4. Battery

View answer

783. Which of the following is not a characteristic observed in material failure by fatigue fracture?

1. Plastic deformation of material does not occur
2. Initiation of crack from below the surface does not occur
3. Initiation of crack occurs on the surface of the machine part
4. Presence of both rough & smooth zone with conchoidal markings in smooth zone of the surface

View answer

784. Which of the following is not a charge material for cupola?

1. Limestone
2. Iron scrap
3. Iron ore
4. Pig iron

View answer

785. Which of the following is not a dielectric material?

1. Cotton, silk and paper
2. Asbestos, glass, porcelain and mica
3. Rubber and polymeric resins
4. All refractory materials

View answer

786. Which of the following is not a ferromagnetic material?

1. Nickel
2. Cobalt
3. Aluminium
4. Iron

View answer

787. Which of the following is not a principal alloying element for the structural steel?

1. Molybdenum
2. Nickel
3. Manganese
4. Chromium

View answer

788. Which of the following is not an explosive?

1. TNT
2. CMC
3. RDX
4. Lead azide

View answer

789. Which of the following is not an ore of copper?

1. Cryolite
2. Azurite
3. Chalcopyrite
4. Malachite

View answer

790. Which of the following is not categorised as the ore agglomeration process?

1. Nodulising
2. Pelletising
3. Balling
4. Briquetting

View answer