600+ Assistant Engineer Interview Questions and Answers

Slump for casting of concrete is measured using a cone. Slump value may decrease as height increases in high rise buildings.

• Slump is measured using a cone and the difference between the height of the cone and the height of the concrete after it settles is the slump value.

• As height increases in high rise buildings, the pressure on the concrete increases, which may cause the slump value to decrease.

• To maintain the desired slump value, additives such as plasticizers or superplas...read more

Only 1 set of cube sample is taken at a casting of concrete of 5 or less than 5 Meter cube to save cost and time.

• Taking multiple samples would increase the cost of testing.

• The strength of concrete is usually consistent within a small volume.

• ASTM C31 allows for only 1 set of samples for small volume concrete.

• If the first set of samples fails, additional samples can be taken for verification.

Capacitance is the ability of a system to store an electric charge, while inductance is the ability of a system to store magnetic energy.

• Capacitance is measured in farads and is determined by the physical characteristics of the capacitor.

• Inductance is measured in henries and is determined by the physical characteristics of the inductor.

• A rectifier is an electrical device that converts alternating current (AC) to direct current (DC).

• Electrons in the outer orbit of an atom are ...read more

5S is a methodology used in industries to improve workplace organization and efficiency.

• 5S stands for Sort, Set in Order, Shine, Standardize, and Sustain.

• It focuses on organizing the workplace, eliminating waste, and maintaining cleanliness.

• Sort involves removing unnecessary items from the workplace.

• Set in Order involves arranging necessary items in a logical and efficient manner.

• Shine involves cleaning and maintaining the workplace.

• Standardize involves establishing guideline...read more

The right bonding agent for recasting of concrete after rain would be a polymer-modified cementitious bonding agent.

• The surface should be cleaned and dried before applying the bonding agent.

• The bonding agent should be applied in a thin layer using a brush or roller.

• The recasting of concrete should be done within the specified time frame mentioned by the bonding agent manufacturer.

• Examples of polymer-modified cementitious bonding agents are SikaLatex R and Ardex P 82.

Permissible values for deflection in a structure according to IS provisions.

• The maximum permissible deflection for a structure is L/180 for live load and L/325 for total load.

• L is the span of the beam or slab in meters.

• The deflection limit is to ensure the safety and comfort of the occupants of the structure.

• The deflection limit varies for different types of structures and materials used.

• For example, the deflection limit for a reinforced concrete beam is different from that o...read more

To draw a Bending Moment diagram, one needs to determine the reactions, calculate the shear force and integrate it to get the bending moment.

• Determine the reactions at the supports

• Calculate the shear force at each section of the beam

• Integrate the shear force to get the bending moment

• Plot the bending moment diagram

Gutter is an example of open channel flow.

• Open channel flow is a flow of fluid in a channel with a free surface.

• Gutter is an open channel that carries rainwater from roofs to the ground.

• Closed pipe flow is a flow of fluid in a pipe with a closed surface.

• Examples of closed pipe flow include water supply pipes and sewage pipes.

An ideal diode is a theoretical diode that exhibits zero voltage drop when forward biased and infinite resistance when reverse biased.

• An ideal diode acts as a perfect conductor when forward biased.

• It allows current to flow in one direction with zero voltage drop.

• When reverse biased, it acts as an open circuit with infinite resistance.

• The input-output characteristic curve of an ideal diode is a vertical line at zero voltage for forward bias and a horizontal line at zero curren...read more

Capa, poka yoke, 8D, measuring instruments, drawing study, v/s product audit and process audit, IATF 16949, MSA, SPC.

• CAPA stands for Corrective and Preventive Action

• Poka Yoke is a mistake-proofing technique used in manufacturing

• 8D is a problem-solving methodology used in quality control

• Measuring instruments are tools used to measure physical quantities

• Drawing study involves analyzing engineering drawings to ensure accuracy

• Product audit is an inspection of finished products, w...read more

Safety precautions include wearing appropriate PPE, following proper procedures, and regular equipment maintenance. Steel wastage control involves accurate BBS preparation and monitoring on site.

• Wear appropriate PPE such as hard hats, safety glasses, and steel-toed boots

• Follow proper procedures for handling equipment and materials

• Regularly maintain equipment to ensure it is in good working condition

• Prepare accurate BBS to minimize steel wastage

• Monitor steel usage on site to e...read more

When a fan rotates in the opposite direction, it reverses the airflow and can cause the fan to function improperly.

• Reversing the direction of a fan can disrupt the intended airflow in a room.

• In some cases, reversing the fan direction can lead to decreased cooling or heating efficiency.

• Changing the fan direction can also affect the distribution of air in the room.

• For ceiling fans, reversing the direction can change the direction of the downdraft or updraft.

• It is important to c...read more

There are mainly two types of pumps used in HVAC systems: centrifugal pumps and positive displacement pumps.

• Centrifugal pumps are commonly used in HVAC systems for circulating water or other fluids. They are efficient and have a simple design.

• Positive displacement pumps are used for applications where a specific flow rate is required, such as in hydronic heating systems.

• Other types of pumps used in HVAC systems include axial flow pumps, mixed flow pumps, and regenerative turb...read more

To get 8 equal pieces from a cake, you need a minimum of 3 cuts.

• The first cut divides the cake into two equal halves.

• The second cut divides one of the halves into two equal quarters.

• The third cut divides one of the quarters into two equal eighths.

The type of bearing used in RALF and pump is usually a ball bearing or roller bearing.

• Ball bearings are commonly used in RALF and pump applications due to their ability to handle radial and axial loads.

• Roller bearings are also used in some applications where higher load capacity is required.

• The specific type of bearing used will depend on the size and speed of the equipment.

• Proper lubrication is important for the longevity and performance of the bearing.

• Regular maintenance an...read more

The least count of Vernier caliper, Micrometre, DVC, and DMM is the smallest measurement that can be read or measured using these instruments.

• The least count of a Vernier caliper is typically 0.02 mm or 0.001 inch.

• The least count of a Micrometre is usually 0.01 mm or 0.001 inch.

• The least count of a DVC (Digital Vernier Caliper) depends on the specific model, but it is generally around 0.01 mm or 0.0005 inch.

• The least count of a DMM (Digital Multimeter) depends on the range an...read more

I will choose the direction opposite to the wind direction to avoid spreading of fire or gas leakage.

• Choose direction opposite to wind direction

• Avoid spreading of fire or gas leakage

• Consider the location of people and property

• Use appropriate firefighting equipment

• Evacuate people from the affected area

The lines connecting other countries in NER refer to the international borders and transportation routes.

• The international borders of NER connect it with neighboring countries like Bhutan, China, and Myanmar.

• Transportation routes like roads, railways, and airways also connect NER with other countries.

• Examples of transportation routes include the India-Myanmar-Thailand Trilateral Highway and the India-Bhutan Friendship Road.

Engineering is the application of scientific and mathematical principles to design and create solutions to real-world problems.

• Engineering involves using scientific and mathematical knowledge to solve practical problems.

• Engineers design and create solutions that improve the quality of life and make tasks more efficient.

• Engineering encompasses various disciplines such as civil, mechanical, electrical, and software engineering.

• Engineers apply their knowledge to develop new tech...read more

To connect a 48V 300Ah battery bank to a 24V timing system, you can use a DC-DC converter or series-parallel connection.

• Use a DC-DC converter to step down the voltage from 48V to 24V.

• Connect the battery banks in series-parallel configuration to achieve the desired voltage and capacity.

• Ensure proper wiring and safety measures are followed during the connection process.

Power factor is a measure of how effectively electrical power is being used. There are three types: lagging, leading, and unity.

• Lagging power factor occurs when the current lags behind the voltage waveform.

• Leading power factor occurs when the current leads the voltage waveform.

• Unity power factor occurs when the current and voltage waveforms are in phase.

• Lagging power factor is common in inductive loads like motors, while leading power factor is common in capacitive loads like...read more

PPM stands for Planned Preventative Maintenance. It should be done every 3-6 months for chillers, AHUs, pumps, and other equipment.

• PPM is a proactive approach to maintenance to prevent breakdowns and prolong equipment life.

• Chillers, AHUs, pumps, and other critical equipment should undergo PPM every 3-6 months.

• Regular PPM helps in identifying potential issues early and ensures optimal performance of the equipment.

• PPM involves tasks like cleaning, lubricating, inspecting, and t...read more

I would communicate openly with the customer, provide updates on the situation, and offer alternative solutions.

• Communicate with the customer as soon as possible to inform them of the delay

• Provide regular updates on the progress and expected timeline

• Offer alternative solutions such as partial deliveries or expedited shipping options

• Apologize for the inconvenience and assure the customer of your commitment to fulfilling their order

I will immediately inform the supervisor and follow the emergency protocol for handling hydrogen gas release.

• Inform the supervisor immediately

• Follow the emergency protocol for handling hydrogen gas release

• Evacuate the area if necessary

• Wear appropriate personal protective equipment

• Ensure proper ventilation

• Monitor the gas levels

• Take necessary steps to prevent ignition sources

Ductile iron is a type of cast iron that contains graphite in the form of nodules, making it more flexible and durable.

• Ductile iron is also known as nodular cast iron or spheroidal graphite iron.

• It is made by adding small amounts of magnesium or cerium to molten iron, which causes the graphite to form nodules instead of flakes.

• This gives ductile iron its unique properties of high strength, toughness, and ductility.

• It is commonly used in automotive and construction industries ...read more

Special precautions during mold filling in rainy season

• Ensure proper drainage system to avoid water accumulation

• Cover the mold to prevent rainwater from entering

• Increase mold temperature to compensate for high humidity

• Use mold release agents to prevent water from sticking to the mold surface

• Inspect mold for any signs of water damage before and after filling

Power flows from one end to the other through a closed circuit, following the path of least resistance.

• Power flows through conductive materials such as wires or cables.

• It is generated at a power source, such as a generator or a battery.

• The power source creates a potential difference, or voltage, which pushes the electrons to flow.

• The electrons flow from the higher potential end to the lower potential end.

• The flow of electrons creates an electric current.

• The current flows thro...read more