Bharat Electronics Interview Questions, Process, and Tips for Freshers

Basic que on oops dbms apti etc

Q1. Mutable keyword in c++
Ans. 
mutable keyword allows a member variable of a class to be modified even if the object is declared as const.
• Used to modify a const object's member variable

• Does not affect the const-ness of the object itself

• Helpful when caching values in a const member function
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Q2. Inline function in c++
Ans. 
Inline functions in C++ are functions that are expanded in place at the point of call, rather than being called like regular functions.
• Inline functions are typically used for small, frequently called functions to reduce the function call overhead.

• They can improve performance by eliminating the function call and return overhead.

• Inline functions should be used judiciously as they can increase code size if overused.

• Exampl
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Q1. Abount company what to do
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Q1. What is refrigeration cycle
Ans. 
The refrigeration cycle is a process that removes heat from a space or substance to lower its temperature.
• The cycle consists of four main components: compressor, condenser, expansion valve, and evaporator.

• The compressor increases the pressure and temperature of the refrigerant gas.

• The high-pressure gas then flows into the condenser where it releases heat and becomes a high-pressure liquid.

• The liquid refrigerant passes ...read more
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Q2. What is air conditioner
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An air conditioner is a device that cools and dehumidifies the air in a room or building.
• Air conditioners use refrigeration cycles to remove heat and moisture from the air.

• They consist of components such as compressors, condensers, evaporators, and fans.

• Air conditioners can be used for both cooling and heating purposes.

• Examples of air conditioners include window units, split systems, and central air conditioning system
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Q3. How many types of condenser are tere
Ans. 
There are several types of condensers used in various industries and applications.
• Air-cooled condenser

• Water-cooled condenser

• Shell and tube condenser

• Plate condenser

• Evaporative condenser

• Surface condenser

• Finned tube condenser
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Q4. Primary secondary and condenser and ahu how to work explain
Ans. 
Primary, secondary, condenser, and AHU are components of a HVAC system.
• Primary and secondary refer to the two sides of a heat exchanger in the HVAC system.

• The primary side carries the hot fluid or refrigerant, while the secondary side carries the cool fluid or air.

• The condenser is a heat exchanger that removes heat from the refrigerant and converts it from a gas to a liquid.

• The AHU (Air Handling Unit) is responsible fo...read more
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Q5. How many types of chiller safety are there
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There are several types of chiller safety measures that are implemented to ensure safe operation and prevent accidents.
• Safety measures include pressure relief valves to prevent overpressure

• Temperature sensors to monitor and control the chiller's operating temperature

• Flow switches to detect and prevent low or no flow conditions

• High-pressure switches to protect against excessive pressure

• Low-pressure switches to prevent d...read more
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Q6. How much in resistance ohms
Ans. 
The resistance is measured in ohms.
• Resistance is a measure of how much a material opposes the flow of electric current.

• The unit of resistance is ohms (Ω).

• Resistance can be calculated using Ohm's Law: R = V/I, where R is resistance, V is voltage, and I is current.

• Resistance can vary depending on the material, length, and cross-sectional area of a conductor.

• For example, a copper wire with a length of 1 meter and a cross-...read more
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Q7. How much sensor voltage
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The sensor voltage varies depending on the specific sensor and its application.
• Sensor voltage is typically measured in volts (V).

• Different sensors may have different voltage ranges and requirements.

• For example, a temperature sensor may operate within a voltage range of 0-5V.

• Some sensors may require a specific voltage supply, while others may be designed to work with a wide range of voltages.

• It is important to consult t...read more
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Q8. Thermoelectric refrigeration system operate on the principle of peltier effect
Ans. Why is ammonia the only common refrigerant used in the absorption system
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Q9. Because ammonia is cheap readily available and has the highest efficiency
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Q1. What is your expertise
Ans. 
My area of expertise is in full-stack web development.
• Proficient in front-end technologies such as HTML, CSS, and JavaScript

• Experienced in back-end development using languages like Node.js and Python

• Familiar with databases like MySQL and MongoDB

• Have worked on projects involving RESTful APIs and responsive design
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Q1. What are types of cast iron? Describe their application in machines.
Ans. 
Types of cast iron include gray cast iron, white cast iron, ductile cast iron, and malleable cast iron, each with specific applications in machines.
• Gray cast iron: used for engine blocks, gears, and machine tool structures

• White cast iron: used for wear-resistant parts like cylinder liners and grinding balls

• Ductile cast iron: used for crankshafts, camshafts, and gears in automotive applications

• Malleable cast iron: used ...read more
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Q2. Describe toughness, ductility and malleability of material.
Ans. 
Toughness is the ability of a material to resist fracture, ductility is the ability to deform without breaking, and malleability is the ability to be hammered into thin sheets.
• Toughness is the ability of a material to absorb energy and plastically deform without fracturing.

• Ductility is the ability of a material to undergo significant plastic deformation before rupture.

• Malleability is the ability of a material to be ham...read more
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