NMDC Limited Operator Interview Questions and Answers

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

Estimating wiring and connections in a building involves assessing the electrical needs and layout of the space.

• Assess the electrical needs of the building, including the number of outlets, lighting fixtures, and appliances.

• Determine the layout of the building and the best routes for wiring to avoid hazards and maximize efficiency.

• Consider the type of wiring needed, such as copper or aluminum, and the appropriate gauge...read more

Cables that transfer power are of different types depending on the application.

• AC power cables

• DC power cables

• Coaxial cables

• Ethernet cables

• USB cables

• HDMI cables

• Optical fiber cables

Single phase motors are commonly used in household appliances and small machinery.

• Split-phase motor

• Capacitor-start motor

• Capacitor-run motor

• Shaded-pole motor

Distribution transformer rating is the maximum power it can handle without overheating.

• Distribution transformer rating is expressed in kVA (kilovolt-ampere).

• It is important to choose the right rating for the transformer based on the load requirements.

• The rating of a transformer can be determined by calculating the load requirements of the system it is being installed in.

• For example, if the load requirement is 500 kVA, ...read more

The number of pl, cl, and pf ESI available is unknown.

• The exact number of pl, cl, and pf ESI available is not provided.

• There is no available data to determine the number of pl, cl, and pf ESI.

• Without specific information, it is impossible to answer the question.