Heidelberg Cement Instrumentation Technician Interview Questions and Answers for Freshers

Q1. Questions was basic as per technical department.
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Drawing of starter for star delta and
A Lpbs wiring, load cell colour code connection

Q1. First I introduced myself and my incharge asked me delta connection for motor and about meggering and loadcell wiring colour code and about weighfeeder also why use 4-20 ma in auto system
Ans. I answered we are use 4 -20 MA because the system is healthy or unhealthy easily know at control room
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Q2. What are the fault of motor taking over current
Ans. 
Motor overcurrent faults can be caused by various factors.
• Overloading

• Short circuits

• Ground faults

• Mechanical binding

• Voltage imbalance

• Inadequate cooling

• Excessive starting

• Inadequate wire size

• Inadequate protection

• Motor design flaws
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Q3. What are the Electrical fault occurs in the motor
Ans. 
Electrical faults in motors can include short circuits, open circuits, insulation breakdown, and overloading.
• Short circuits occur when there is a direct connection between the motor windings, causing excessive current flow.

• Open circuits happen when there is a break in the electrical path, preventing current from flowing.

• Insulation breakdown occurs when the insulation material surrounding the motor windings deteriorates...read more
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Q4. What is the meaning of s1 duty
Ans. 
S1 duty refers to a continuous duty cycle of a motor or machine.
• S1 duty means that the motor or machine can run continuously without any rest or cooling breaks.

• It is typically used for applications where the load is constant and the motor or machine does not need to be turned off.

• Examples of S1 duty applications include conveyor belts, pumps, and fans.

• S1 duty is also known as continuous duty.

• It is important to ensure t...read more
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Q5. Pt 100 rtd supply and thermocouple
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