Question: For absorbers, high pressure drop results in___________________?

• 1. Increased efficiency
• 2. Decreased efficiency
• 3. High operating cost
• 4. Better gas liquid contact

Question: _____________ is the temperature at which a gas-vapor mixture becomes saturated, when cooled at constant total pressure out of contact with a liquid ?

• 1. Dew point
• 2. Bubble point
• 3. Dry bulb temperature
• 4. Wet bulb temperature

Question: __________________ does not contain copper as an alloying element?

• 1. Nichrome
• 2. Manganin
• 3. Perminvar
• 4. Monel metal

Question: In SO3 absorber (Contact Process), packing material used is of________________?

• 1. Cast iron
• 2. Chemical stoneware
• 3. Karbate
• 4. Mild steel

Question: Addition of lead, sulphur and phosphorus to low carbon steel helps in improving its__________________?

• 1. Corrosion resistance
• 2. Tensile strength
• 3. Machinability
• 4. Compressive strength

Question: Bearings subjected to light load are made of________________?

• 1. White metal
• 2. Phosphorous bronze
• 3. Monel
• 4. Silicon bronze

Question: With increase in the carbon percentage in the steel, its__________________?

• 1. Hardness increases
• 2. Ductility reduces
• 3. Tensile strength increases
• 4. All A, B & C

Question: Which of the following has the least value of ultimate tensile strength (UTS) ?

• 1. Medium carbon steel
• 2. High carbon steel
• 3. Cast iron
• 4. Wrought iron

Question: To improve the machinability of steel by its softening, it is subjected to __________________?

• 1. Cold working
• 2. Annealing
• 3. Shot blasting
• 4. Heating

Question: Bog iron used for the adsorption of H2S from coke oven gas is___________________?

• 1. An intimate mixture of saw dust and iron dust (i.e. moist ferric hydroxide)
• 2. Iron impregnated with resin (usually Bakelite)
• 3. Carbon free iron
• 4. None of these