Question: The specific gravity of coal depends mainly on its ______________ content?

• 1. Carbon
• 2. Volatile matter
• 3. Ash
• 4. Moisture

Question: Bell metal is an alloy of __________________?

• 1. Copper & zinc
• 2. Copper & tin
• 3. Copper & nickel
• 4. Zinc & tin

Question: Hastelloy C is a good material of construction in chemical process industry, since it is ___________________?

• 1. Highly corrosion resistant and is readily fabricated
• 2. Relatively inexpensive although it can be fabricated with some difficulty
• 3. Corrosion resistant to most alkalis, particularly because of its copper content
• 4. Light and resists attack by acids

Question: Most of the common metals have ______________ crystal structure?

• 1. Cubic
• 2. Hexagonal
• 3. Orthorhombic
• 4. None of these

Question: Ball bearings are normally made of _____________ steel?

• 1. High speed
• 2. High carbon
• 3. Chrome
• 4. Silicon

Question: Condenser tubes are not made of_________________?

• 1. Cartridge brass
• 2. Muntz brass
• 3. Wood metal
• 4. Aluminium brass alloy

Question: Evaporator used for concentrating tomato juice is made of __________________?

• 1. Nickel
• 2. Brass
• 3. Stainless steel-glass lined
• 4. Cast iron-rubber lined

Question: Lead lined equipments & vessels are suitable for handling __________________?

• 1. Hydrochloric acid (10%)
• 2. Nitric acid
• 3. Sulphuric acid upto 60°C
• 4. All A, B and C

Question: Carbon is present in steel wholly in the__________________?

• 1. Combined form
• 2. Free state as graphite
• 3. Both A and B
• 4. Neither A nor B

Question: Mild steel is a/an _____________ steel?

• 1. Low carbon
• 2. Medium carbon
• 3. High carbon
• 4. High alloy