Question: Alinco, which is a aluminium-cobalt-nickel steel, is used for making __________________?

• 1. Surgical instruments
• 2. Powerful magnets
• 3. Chemical equipments
• 4. Boiler tubes

Question: Containers made of high silicon cast iron (14% Si) are not suitable for the storage of ____________________?

• 1. Acetic acid
• 2. Benzoic & boric acids
• 3. Phosphoric acid (95%) & sulphuric acid (95%)
• 4. Hydrochloric acid (concentrated)

Question: Sorting classifiers employing differential settling methods for separation of particles make use of the differences in their_________________?

• 1. Particle sizes
• 2. Densities
• 3. Terminal velocities
• 4. None of these

Question: __________ conveyor is the most suitable for short distance transportation of non-abrasive loose materials like garbage, grain, food wastes etc?

• 1. Flight
• 2. Screw
• 3. Drag
• 4. Belt

Question: Gelatinous solid (which plug the septum) can be filtered by a _____________ filter?

• 1. Sparkler
• 2. Plate and frame
• 3. Vacuum leaf
• 4. Pre-coat

Question: Sphericity of a cubical particle, when its equivalent diameter is taken as the height of the cube, is ________________ ?

• 1. 0.5
• 2. 1
• 3. √2
• 4. √3

Question: For benefication of iron ore, the most commonly used method is______________?

• 1. Flocculation
• 2. Froth floatation
• 3. Jigging & tabling
• 4. None of these

Question: Basic slag is not ground in_________________?

• 1. Jaw crushers
• 2. Ball mills
• 3. Compartment mills
• 4. Tube mills

Question: Stamp mills are generally used for crushing__________________?

• 1. Iron ores
• 2. Gold ores
• 3. Talc
• 4. Diamond

Question: Which of the following minerals is not subjected to magnetic separation method ?

• 1. Rutile
• 2. Galena
• 3. Chromite
• 4. Siderite