1500+ Graduate Engineer Trainee (Get) Interview Questions and Answers

Technical interview questions on IC engines, machining operations, welding, casting, heat treatment, thermodynamics, materials, and mechanics.

• IC engine types include spark ignition (SI) and compression ignition (CI)

• Otto cycle is used in SI engines while Diesel cycle is used in CI engines

• Welding types include MIG, TIG, and stick welding

• Casting types include sand casting, investment casting, and die casting

• Heat treatment processes include annealing, quenching, and tempering

• Ther...read more

To check continuity of a wire inside a wall, use a multimeter and connect it to the starting and end points of the wire.

• Turn off power to the circuit before testing

• Set the multimeter to continuity mode

• Connect one probe to the starting point and the other to the end point

• If the multimeter beeps or shows a reading, the wire has continuity

• If there is no continuity, the wire may be broken or disconnected

The cost of painting the wall behind me cannot be determined without additional information.

• The cost of painting a wall depends on various factors such as the size of the wall, the type of paint used, and the labor charges.

• Additional information needed includes the dimensions of the wall, the type of paint desired, and the cost of labor per square foot or hour.

• Once these details are provided, an estimate can be calculated by multiplying the area of the wall by the cost per sq...read more

Large air voids in concrete can weaken its strength and durability.

• Air voids can reduce the density of concrete, making it more porous and susceptible to water penetration.

• This can lead to freeze-thaw damage, corrosion of reinforcement, and reduced durability.

• Air voids can also weaken the compressive strength of concrete, making it more prone to cracking and failure.

• Proper compaction and curing can help minimize the formation of air voids in concrete.

• Air-entraining agents can...read more

10 bags with 10 coins each, one bag has 0.9 gm coins. How to find it using weighing machine once?

• Number the bags from 1 to 10

• Take 1 coin from bag 1, 2 coins from bag 2, 3 coins from bag 3, and so on

• Weigh all the coins together

• Subtract the expected weight (550 gm) from the actual weight to get the bag number with 0.9 gm coins

M25 concrete is a mix of concrete with a compressive strength of 25 MPa.

• M25 concrete is commonly used in construction for foundations, columns, and beams.

• It is made by mixing cement, sand, and coarse aggregates in a ratio of 1:1:2.

• The water-cement ratio should be around 0.45 for M25 concrete.

• The compressive strength of M25 concrete is achieved after 28 days of curing.

• M25 concrete is suitable for moderate exposure conditions.

Detect if a singly linked list forms a cycle by checking if a node's next points back to a previous node.

• Traverse the linked list using two pointers, one moving one step at a time and the other moving two steps at a time.

• If the two pointers meet at any point, it indicates the presence of a cycle in the linked list.

• To optimize space complexity, use constant extra space by modifying the linked list nodes.

The task is to reverse a given string containing characters from [a-z], [A-Z], [0-9], and special characters.

• Iterate through the characters of the string from the end to the beginning and append them to a new string to get the reversed string.

• Use built-in functions like reverse() or StringBuilder in languages like Java for efficient reversal.

• Ensure to handle special characters and numbers along with alphabets while reversing the string.

• Consider edge cases like empty string or...read more

If the transit mixer is delayed in reaching the site before the i.s.t. of cement, I would take the following actions.

• Contact the transit mixer driver to inquire about the delay and estimated time of arrival.

• Inform the site supervisor and project manager about the delay.

• Evaluate the impact of the delay on the construction schedule and adjust accordingly.

• Consider alternative options such as sourcing cement from a nearby supplier or rescheduling the concrete pouring.

• Coordinate w...read more

White fumes from automobile silencer are due to condensation of water vapor and unburnt fuel.

• During combustion, water vapor is produced as a byproduct.

• When the exhaust gases cool down in the silencer, the water vapor condenses and appears as white fumes.

• Unburnt fuel can also contribute to the white fumes.

• This is a normal phenomenon and nothing to worry about unless the fumes are excessive or have a strange odor.

Number of times hour and minute hand overlap in a 12-hour clock in 12 hours.

• The hands overlap every hour at 5 minutes past the hour.

• The hands overlap once more between 12:00 and 1:00.

• Total overlaps in 12 hours are 11.

Answering questions related to transformers, MOSFETs, generators, and major projects.

• A transformer is an electrical device that transfers energy between two or more circuits through electromagnetic induction.

• MOSFET is a type of transistor used for amplification and switching of electronic signals. It is used in power supplies, motor control, and audio amplifiers.

• A generator converts mechanical energy into electrical energy, while a motor converts electrical energy into mechan...read more

Different types of pumps and their differences.

• Centrifugal pumps: used for low viscosity fluids, high flow rates, low pressure

• Positive displacement pumps: used for high viscosity fluids, low flow rates, high pressure

• Axial flow pumps: used for high flow rates, low pressure, low viscosity fluids

• Mixed flow pumps: used for medium flow rates and pressures

• Jet pumps: used for pumping fluids with high solids content

• Differences include design, flow rate, pressure, viscosity, and appli...read more

As a mechanical engineer, I would consider parameters such as engine type, fuel efficiency, safety features, durability, and maintenance costs.

• Engine type - petrol, diesel, electric, hybrid

• Fuel efficiency - mileage, fuel consumption

• Safety features - airbags, ABS, EBD, ESC

• Durability - build quality, material used

• Maintenance costs - service intervals, spare parts availability

The general steps in constructing a building involve planning, designing, obtaining permits, site preparation, foundation, framing, electrical and plumbing, insulation, drywall, and finishing.

• Plan and design the building

• Obtain necessary permits and approvals

• Prepare the site for construction

• Lay the foundation

• Frame the building

• Install electrical and plumbing systems

• Insulate the building

• Install drywall and other finishes

• Complete final touches and inspections

Strength of concrete refers to its ability to resist external forces and maintain its shape and integrity.

• Strength of concrete is measured in terms of its compressive strength, which is the maximum amount of force it can withstand before it fails.

• The strength of concrete depends on the ratio of cement, water, and aggregates used in its mixture.

• Concrete gains strength over time as it cures and hardens, with most of the strength gained in the first 28 days.

• The strength of concr...read more

The procedure for form work removal on site involves several steps to ensure safety and quality of the structure.

• Inspect the concrete for strength and stability

• Remove the formwork in a systematic manner to avoid damage to the concrete

• Ensure that the removal process does not cause any stress or strain on the structure

• Dispose of the formwork material properly

• Clean and prepare the area for the next phase of construction

25 KV AC is more efficient for railways due to lower transmission losses and higher power carrying capacity.

• 25 KV AC has lower transmission losses compared to 750V DC

• 25 KV AC can carry higher power compared to 750V DC

• 25 KV AC is more suitable for long distance and high-speed trains

• 750V DC is more suitable for urban and suburban railways

• Examples: Indian Railways uses 25 KV AC for long distance and high-speed trains, while Mumbai suburban railways use 750V DC

Program to find second largest number from set of array

• Sort the array in descending order

• Return the second element of the sorted array

Questions related to pumps, flow meters, distillation column, and heat transfer modes.

• Pumps are devices used to move fluids by mechanical action.

• Flow meters are instruments used to measure the flow rate of fluids.

• The working of flow meters varies depending on the type of flow meter used.

• Increasing the reflux ratio in a distillation column increases the purity of the distillate.

• The modes of heat transfer are conduction, convection, and radiation.

To join 2 C-Sections facing towards each other, align the two sections and use appropriate fasteners.

• Align the two C-Sections so that they are facing towards each other

• Ensure that the edges of the sections are properly aligned

• Use appropriate fasteners such as screws, bolts, or rivets to join the sections together

• Ensure that the fasteners are securely tightened to provide a strong connection

• Consider using additional reinforcement methods like welding or adhesive bonding for ad...read more

Authentication is verifying identity, authorization is granting access. Form validation ensures data is entered correctly.

• Authentication confirms the identity of a user, while authorization determines what actions they can perform.

• Authentication can be implemented through methods like passwords, biometrics, or two-factor authentication.

• Authorization can be implemented through role-based access control or attribute-based access control.

• Form validation can be applied using Java...read more

Cut the cake twice horizontally and once vertically to make 8 pieces.

• Make two horizontal cuts to get three layers

• Make one vertical cut through the center

• Total 8 pieces will be obtained

Object-oriented programming is a programming paradigm that uses objects to represent and manipulate data. Procedural programming is a programming paradigm that uses procedures or functions to structure the program.

• Object-oriented programming focuses on objects and their interactions.

• Procedural programming focuses on procedures or functions.

• In object-oriented programming, data and behavior are encapsulated within objects.

• In procedural programming, data and behavior are separat...read more

Bernoulli's theorem explains the relationship between fluid speed and pressure.

• Bernoulli's theorem states that as the speed of a fluid increases, its pressure decreases.

• It is important in industries such as aviation, where it is used to design wings and airfoils.

• It is also used in the design of pipelines and pumps.

• Limitations include the assumption of incompressible and non-viscous fluids, and the neglect of friction and turbulence.

• Bernoulli's equation can be used to calculat...read more

The slump value for pumpable concrete varies depending on the mix design and application.

• Slump value is the measure of the consistency of concrete.

• Pumpable concrete typically has a higher slump value than traditional concrete.

• The slump value for pumpable concrete can range from 150mm to 200mm.

• The mix design and application will determine the appropriate slump value for pumpable concrete.

The difference in heat conduction between a hot bar placed in still liquid and in moving liquid.

• In still liquid, heat conduction occurs primarily through conduction and natural convection.

• In moving liquid, heat conduction occurs through conduction, forced convection, and turbulence.

• Moving liquid enhances heat transfer due to increased fluid motion and mixing.

• The rate of heat conduction is generally higher in moving liquid compared to still liquid.

• Examples: Stirring a hot drin...read more