10+ Assembly Engineer Interview Questions and Answers for Freshers

The indoor unit and outdoor unit coils are typically made of metals such as copper, aluminum, or a combination of both.

• Common metals used in coils are copper and aluminum

• Some coils may be made of a combination of copper and aluminum for better heat transfer

• Other metals like steel may also be used in some cases

The copper pipe between indoor and outdoor units is covered by foam and white roll for insulation and protection against external elements.

• The foam provides insulation to prevent heat loss or gain during the refrigerant transfer process

• The white roll acts as a protective layer to shield the copper pipe from external damage such as UV rays, moisture, and physical impact

• The insulation and protection help maintain the efficiency and longevity of the HVAC system

Using two adjustable spanners to tighten a flare nut in a union can lead to it loosening due to uneven pressure distribution.

• Using two adjustable spanners can result in uneven pressure being applied to the flare nut

• This can cause the flare nut to become loose over time

• It is recommended to use a proper flare nut wrench for tightening flare nuts in unions

The AC may be cut off due to various reasons such as power outage, malfunctioning components, or scheduled maintenance.

• Power outage: AC will be cut off if there is a power outage in the building.

• Malfunctioning components: If any part of the AC system malfunctions, it may be cut off to prevent further damage.

• Scheduled maintenance: AC may be cut off temporarily for routine maintenance to ensure optimal performance.

Vernier caliper is a precision measuring tool used to measure dimensions with high accuracy.

• Used to measure the internal and external dimensions of an object

• Consists of a main scale and a sliding vernier scale for more precise measurements

• Commonly used in engineering, machining, and manufacturing industries

• Example: Measuring the diameter of a shaft or the thickness of a sheet metal

AC works by transferring heat from inside a building to outside, using a refrigeration cycle.

• AC units contain a refrigerant that absorbs heat from indoor air and releases it outside.

• The refrigerant evaporates at low pressure and temperature, absorbing heat in the process.

• The refrigerant is then compressed, raising its temperature and pressure, before releasing the heat outside.

• The cycle continues to maintain a comfortable indoor temperature.

• Examples of AC systems include wind...read more

Vaccuuming the AC indoor helps remove dust, dirt, and debris that can accumulate and block airflow, leading to inefficient cooling and potential damage to the system.

• Vaccuuming helps improve the efficiency of the AC system by ensuring proper airflow.

• It helps prevent blockages caused by dust and debris, which can lead to overheating and system malfunctions.

• Regular vaccuuming can prolong the lifespan of the AC unit and reduce the need for costly repairs.

• It also helps maintain i...read more

Yes, I can read mechanical drawings.

• I have experience reading and interpreting mechanical drawings.

• I am familiar with symbols, dimensions, and tolerances used in mechanical drawings.

• I can understand different views and sections in a mechanical drawing.

• I have worked with CAD software to create and modify mechanical drawings.

• I can identify different components and their relationships in a mechanical drawing.

Types of AC include window AC, split AC, central AC, portable AC, and ductless mini-split AC.

• Window AC: typically installed in a window and cools a single room

• Split AC: consists of two units - one indoor and one outdoor - connected by refrigerant lines

• Central AC: cools the entire house through a system of ducts

• Portable AC: can be moved from room to room and does not require installation

• Ductless Mini-Split AC: similar to split AC but does not require ductwork

The gases in an AC unit typically include refrigerant gases such as R-410A or R-22.

• Refrigerant gases are used in AC units to absorb and release heat in order to cool the air.

• Common refrigerant gases used in AC units include R-410A (Puron) and R-22 (Freon).

• These gases circulate through the AC system in a continuous cycle to facilitate the cooling process.

Four stroke engines have four stages (intake, compression, power, exhaust) per cycle, while two stroke engines have only two stages (compression, power).

• Four stroke engines have separate intake and exhaust strokes, while two stroke engines combine intake and exhaust in one stroke.

• Four stroke engines are more fuel efficient and produce less emissions compared to two stroke engines.

• Examples of four stroke engines include most car engines, while examples of two stroke engines in...read more

Iron carbon diagram shows the phases of iron and carbon at different temperatures.

• Iron carbon diagram is a graphical representation of the phases of iron and carbon at different temperatures.

• It shows the phases such as austenite, ferrite, cementite, and pearlite.

• The diagram helps in understanding the microstructure of steel and its properties.

• The diagram is used in heat treatment processes to control the properties of steel.