Saudi Mechanical Industries CNC Programmer Interview Questions and Answers

Diesel engine works by compressing air in the cylinder and injecting fuel at the right time to ignite the mixture.

• Air is compressed in the cylinder by the piston

• Fuel is injected into the cylinder at the right time

• The heat generated by the compressed air ignites the fuel

• The expanding gases push the piston down, creating power

• Diesel engines are more efficient than gasoline engines

CC stands for carbon copy, a term used in email communication to indicate additional recipients of a message.

• CC is used to send a copy of an email to someone other than the primary recipient

• CC recipients are visible to all other recipients of the email

• CC is often used for informational purposes or to keep others in the loop

• CC can also be used to show transparency in communication

Compression ratio is the ratio of the volume of gas in a cylinder when the piston is at the bottom of its stroke to the volume of gas when the piston is at the top of its stroke.

• It is a measure of how much the engine compresses the air/fuel mixture before ignition.

• Higher compression ratios can lead to better fuel efficiency and more power.

• Compression ratio is calculated by dividing the volume of the cylinder at bottom

Swept volume is the volume of space swept by a piston in an engine cylinder during one stroke.

• It is the volume of the combustion chamber when the piston is at the bottom of its stroke subtracted from the volume of the combustion chamber when the piston is at the top of its stroke.

• It is used to calculate the engine displacement.

• For example, a four-cylinder engine with a 500cc swept volume has a total displacement of 2,0...read more

ICP OES is a technique used for chemical analysis of chromite ore.

• ICP OES stands for Inductively Coupled Plasma Optical Emission Spectroscopy.

• It is a powerful analytical technique used for the determination of trace elements in a variety of matrices.

• ICP OES can be used to determine the concentration of elements such as Cr, Fe, Mg, Al, and Si in chromite ore.

• The technique involves the excitation of atoms in a sample usi...read more

ICP-OES is a technique used for elemental analysis in which a sample is vaporized and excited by a plasma to emit light.

• ICP-OES stands for Inductively Coupled Plasma Optical Emission Spectroscopy.

• It is used to determine the concentration of elements in a sample.

• The sample is vaporized and excited by a plasma to emit light, which is then analyzed to determine the elemental composition.

• ICP-OES is commonly used in environ...read more

Weight chemical analysis of chromite ore involves determining the percentage of various elements present in the ore.

• The ore is first crushed and ground into a fine powder.

• The powder is then mixed with various chemicals to dissolve the elements of interest.

• The resulting solution is then analyzed using various techniques such as atomic absorption spectroscopy or inductively coupled plasma mass spectrometry.

• The percentage...read more