Sandvik Mining and Rock Technology Service Engineer Interview Questions, Process, and Tips

Q1. What is a torque converter?
Ans. 
A torque converter is a fluid coupling that transfers power from the engine to the transmission in an automatic vehicle.
• It allows the engine to keep running while the vehicle is stopped

• It multiplies torque to increase power output

• Consists of three main components: impeller, turbine, and stator

• Commonly found in automatic transmission vehicles
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Q2. What is the process by which transmission works?
Ans. 
Transmission works by transferring power from the engine to the wheels, allowing the vehicle to change speed and direction.
• Transmission uses gears to control the power flow from the engine to the wheels

• The driver selects the appropriate gear based on speed and terrain

• Automatic transmissions use a torque converter to transfer power smoothly

• Manual transmissions require the driver to engage and disengage gears using a clu...read more
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Q3. How many types of differential?
Ans. 
There are mainly three types of differentials: open differential, limited-slip differential, and locking differential.
• Open differential allows wheels to spin at different speeds, useful for regular driving conditions.

• Limited-slip differential limits the speed difference between wheels, providing better traction.

• Locking differential locks both wheels together, ensuring equal power distribution for maximum traction.
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Q4. How many types of hydraulic pump?
Ans. 
There are mainly two types of hydraulic pumps: gear pumps and piston pumps.
• Gear pumps: simple design, cost-effective, suitable for low to medium pressure applications

• Piston pumps: higher efficiency, suitable for high pressure applications, more complex design

• Other types include vane pumps, radial piston pumps, and axial piston pumps
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Q5. How can I check if a potentiometer is working properly?
Ans. 
To check if a potentiometer is working properly, you can use a multimeter to measure the resistance across its terminals.
• Set the multimeter to the resistance measurement mode.

• Connect the multimeter leads to the outer two terminals of the potentiometer.

• Slowly turn the potentiometer knob and observe the resistance value on the multimeter.

• The resistance should change smoothly and continuously as you turn the knob.

• If the r...read more
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Q1. How many years of experience do you have?
Ans. 
I have 5 years of experience as a Service Engineer.
• I have worked in the field for 5 years

• Experience includes troubleshooting, maintenance, and repair of various equipment

• Familiar with different software and tools used in the industry
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Q2. Do you have any medical conditions?
Ans. 
No medical conditions.
• I do not have any medical conditions.

• I am in good health and able to perform the duties of a Service Engineer without any limitations.
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The duration was 50 minutes and included 55 questions focused on technical areas related to mechanical, electrical, and hydraulic systems, as well as some questions on safety and reasoning.

Q1. If vehicles unable to start how you will troubleshoot it.
Ans. 
I would first check the battery, then the starter motor, and finally the ignition system.
• Check the battery for charge and connections

• Inspect the starter motor for any issues

• Test the ignition system for spark

• Check for any loose wires or connections
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Q2. What is gear pump and displacement pump.
Ans. 
Gear pump and displacement pump are types of positive displacement pumps used to move fluids by trapping a fixed amount of fluid and forcing it through the pump.
• Gear pump uses rotating gears to move fluid, while displacement pump moves fluid by changing the volume of a chamber.

• Gear pump is more compact and efficient, while displacement pump is more accurate and suitable for high pressure applications.

• Examples of gear p...read more
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Q1. Different types of pump
Ans. 
There are various types of pumps used in different industries such as centrifugal, positive displacement, and axial flow pumps.
• Centrifugal pumps are commonly used in water treatment, chemical processing, and HVAC systems.

• Positive displacement pumps are used in food processing, oil and gas, and pharmaceutical industries.

• Axial flow pumps are used in irrigation, flood control, and water supply systems.

• Other types of pumps...read more
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Q2. What are most common problem in hydraulic system
Ans. 
The most common problem in hydraulic systems is fluid contamination.
• Fluid contamination

• Leakage in hoses and fittings

• Cavitation

• Overheating

• Wear and tear of components
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Q3. What is CAN bus system
Ans. 
CAN bus system is a communication protocol used in vehicles to allow microcontrollers and devices to communicate with each other.
• CAN stands for Controller Area Network

• It is a two-wire communication system

• It allows for real-time data transmission between devices

• It is commonly used in automotive and industrial applications

• Examples of devices that use CAN bus include engine control units, airbag systems, and anti-lock bra
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Basic hydraulic and Electrical 24V basic knowledge module, Can bus knowledge

Q1. Personal interview
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Q1. Question on machine parts
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