Technical Service Executive Interview Questions and Answers

Concrete testing involves evaluating properties such as compressive strength, workability, and durability.

• Concrete mix design involves determining the optimal ratio of cement, water, and aggregates for a specific application.

• Cement testing includes evaluating properties such as fineness, setting time, and strength.

• Concrete properties such as compressive strength, workability, and durability can be tested using various methods such as slump tests, compression tests, and permea...read more

To prepare 0.1 normal NaOH solution, dissolve 4 grams of NaOH in 1 liter of distilled water.

• Measure 4 grams of NaOH using a balance.

• Add the measured NaOH to a container.

• Add distilled water to the container and stir until the NaOH is completely dissolved.

• Make up the volume to 1 liter with distilled water.

• Label the container as 0.1N NaOH solution.

Equivalence mass refers to the mass of a substance that is equivalent to a given amount of another substance in a chemical reaction.

• Equivalence mass is used in stoichiometry to determine the amount of one substance needed to react with another.

• It is calculated based on the balanced chemical equation and the molar masses of the substances involved.

• For example, in the reaction 2HCl + Na2CO3 -> 2NaCl + H2O + CO2, the equivalence mass of Na2CO3 is 105.99 g/mol.

Molality is the concentration of a solute in a solvent expressed in moles per kilogram, while Normality is the concentration of a solute in a solution expressed in equivalents per liter.

• Molality is a measure of the number of moles of solute per kilogram of solvent.

• It is commonly used in chemistry to express the concentration of a solute in a solution.

• For example, a solution with a molality of 0.5 mol/kg means that there are 0.5 moles of solute dissolved in 1 kilogram of solve...read more