ACC Junior Engineer Interview Questions and Answers

Dry bulb temperature is the temperature of the air measured by a thermometer.

• It is the most commonly used temperature measurement in HVAC systems.

• It is also known as air temperature.

• It does not take into account the moisture content of the air.

• It is measured using a thermometer placed in a shaded area.

• It is used to calculate the relative humidity of the air.

Distillation is a process of separating components of a liquid mixture based on their different boiling points.

• Distillation involves heating a liquid mixture to vaporize the more volatile components.

• The vapor is then cooled and condensed back into a liquid, separating it from the less volatile components.

• The separated components can have different boiling points, allowing for purification or concentration of specific s...read more

Distillation is a process of separating components of a mixture based on their boiling points.

• It involves heating the mixture to vaporize the component with the lowest boiling point.

• The vapor is then condensed and collected as a separate liquid.

• This process can be used to purify liquids, separate different components of a mixture, and extract essential oils from plants.

• Examples include the production of gasoline from c...read more

Wet bulb temperature is the lowest temperature that can be achieved through evaporative cooling of a wet surface.

• It is measured using a thermometer with a wet wick around the bulb.

• It is used to determine relative humidity and dew point.

• It is an important parameter in HVAC systems and weather forecasting.

• Example: If the dry bulb temperature is 30°C and the wet bulb temperature is 25°C, the relative humidity is approxima

Humidity is the amount of water vapor present in the air.

• Humidity can be measured using a hygrometer.

• High humidity can make the air feel heavy and uncomfortable.

• Low humidity can cause dry skin and respiratory problems.

• Humidity affects the rate of evaporation and can impact weather patterns.

• Relative humidity is the ratio of the amount of water vapor in the air to the maximum amount the air can hold at a given temperatur

Chlorination is the process of adding chlorine to water to kill bacteria and other harmful microorganisms.

• Chlorination is commonly used in water treatment plants to ensure safe drinking water.

• Chlorine gas or sodium hypochlorite can be used for chlorination.

• The amount of chlorine added to water is measured in parts per million (ppm).

• Chlorination can also be used to disinfect swimming pools and other recreational water s...read more

Aluminium chloride is made by reacting aluminium with chlorine gas.

• Aluminium is first heated to a high temperature to remove any oxide layer.

• Chlorine gas is then passed over the heated aluminium.

• The reaction produces aluminium chloride as a white powder.

• The equation for the reaction is: 2Al + 3Cl2 -> 2AlCl3

• Aluminium chloride is commonly used as a catalyst in organic chemistry reactions.

Hydrogen is consumed in the reaction with chlorine gas to form hydrogen chloride.

• Hydrogen is removed from aluminium chloride by reacting it with chlorine gas.

• The reaction produces hydrogen chloride gas.

• Hydrogen chloride gas is a byproduct of the manufacturing process.

• Hydrogen chloride gas can be used in the production of PVC.

• The reaction is exothermic and releases heat.

Process safety in our organization involves identifying, evaluating, and controlling potential hazards to prevent accidents.

• We have a comprehensive hazard identification and risk assessment process

• We regularly conduct safety audits and inspections

• We provide training to employees on safe work practices

• We have emergency response plans in place

• Examples of process safety hazards include chemical spills, fires, and explosio

Interlocking systems are safety mechanisms that prevent two or more things from happening at the same time.

• Interlocking systems are commonly used in railways to prevent two trains from entering the same track at the same time.

• In manufacturing plants, interlocking systems are used to prevent machines from operating if safety guards are not in place.

• Interlocking systems can also be used in elevators to prevent the doors ...read more

Reactor pressure or synthesis pressure can be controlled by adjusting cooling or heating, or by releasing excess pressure.

• Adjust cooling or heating to maintain pressure

• Release excess pressure through safety valves

• Monitor pressure regularly to prevent overpressure

• Use pressure relief devices such as rupture discs or pressure relief valves

Anhydrous refers to a substance that does not contain water molecules.

• Anhydrous substances are often used in industrial processes where water can interfere with the reaction or product.

• Examples of anhydrous substances include anhydrous ammonia, anhydrous ethanol, and anhydrous magnesium sulfate.

• Anhydrous can also refer to a state where all water has been removed, such as anhydrous conditions in a laboratory experiment.

• ...read more

HCl is used in our organization for various purposes including laboratory testing, cleaning, and pH adjustment.

• HCl is commonly used in laboratory testing to analyze and identify different substances.

• It is used for cleaning and removing mineral deposits from equipment and surfaces.

• HCl is also used for pH adjustment in various processes and reactions.

• In some cases, it is used as a reagent in chemical reactions to facilit...read more

Our company produces a range of chemical products for various industries.

• We produce acids, bases, and salts for use in manufacturing processes.

• Our products undergo various reactions such as neutralization, precipitation, and oxidation-reduction.

• For example, our hydrochloric acid (HCl) reacts with sodium hydroxide (NaOH) to form sodium chloride (NaCl) and water (H2O). The balanced equation is: HCl + NaOH → NaCl + H2O

• Ano...read more

A 2-4 pass heat exchanger design involves multiple passes of fluid flow to increase heat transfer efficiency.

• Determine the heat transfer rate required and the fluids involved

• Select appropriate materials for the heat exchanger

• Determine the number of passes required based on the heat transfer coefficient and pressure drop

• Design the heat exchanger with appropriate dimensions and flow paths

• Consider factors such as fouling,...read more

Our company provides a range of utility services to meet the needs of our customers.

• We offer electricity, gas, and water services to residential and commercial customers.

• Our utility services are reliable and affordable.

• We have a customer service team available 24/7 to assist with any issues or concerns.

• We also offer energy-saving programs and incentives to help customers reduce their utility bills.

• Our company is commit...read more

We use two types of steam in our organization: saturated and superheated steam.

• Saturated steam is commonly used for heating and sterilization processes.

• Superheated steam is used for power generation and industrial processes.

• The type of steam used depends on the specific application and equipment being used.

• For example, in a steam turbine, superheated steam is used to generate electricity.

• In a sterilization process, sat...read more

We receive raw materials from various suppliers and sell our products through our website and retail stores.

• Raw materials are sourced from trusted suppliers based on quality and cost-effectiveness.

• We maintain a good relationship with our suppliers to ensure timely delivery and availability of materials.

• Our products are sold through our website and retail stores located in major cities.

• We also have tie-ups with online m...read more

Birla produces a wide range of products including cement, chemicals, textiles, and more.

• Cement

• Chemicals

• Textiles

• Pulp and paper

• Metals

• Fertilizers

• Insulators

• Financial services

My favorite subject in my education time was Mathematics.

• I enjoyed solving complex mathematical problems.

• I found joy in discovering patterns and relationships in numbers.

• I appreciated the logical and analytical thinking required in mathematics.

• Mathematics helped me develop problem-solving skills that are valuable in engineering.

• I excelled in mathematics and consistently achieved high grades in the subject.

Safety types refer to different categories or aspects of safety measures in engineering.

• Physical safety: Ensuring protection from physical hazards like falls, electrical shocks, or accidents.

• Chemical safety: Preventing exposure to hazardous chemicals or substances.

• Fire safety: Implementing measures to prevent and control fires.

• Environmental safety: Addressing concerns related to pollution, waste management, and sustain...read more