20+ Sandvik Mining and Rock Technology Interview Questions and Answers

The most common problem in hydraulic systems is fluid contamination.

• Fluid contamination

• Leakage in hoses and fittings

• Cavitation

• Overheating

• Wear and tear of components

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 resistance value jumps around or does not change smoothly, ...read more

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 clutch

• CVT transmissions use a belt and pulley system to provi...read more

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

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

Rope pulleys are used to change the direction of a force, making it easier to lift heavy objects.

• Rope pulleys reduce the amount of force needed to lift heavy objects by distributing the weight over multiple ropes and wheels.

• They are commonly used in construction, rock climbing, and rescue operations.

• Rope pulleys can also be used to create mechanical advantage, allowing for easier lifting of heavy loads.

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.

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 pumps include external gear pump and internal gear pump, wh...read more

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

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 brake systems

Compressors are devices that increase the pressure of a gas or vapor.

• Positive displacement compressors: reciprocating, rotary screw, rotary vane

• Dynamic compressors: centrifugal, axial flow

• Compressors can be classified based on their cooling method: air-cooled or water-cooled

• Compressors can also be classified based on their lubrication method: oil-lubricated or oil-free

Pumps are devices used to move fluids from one place to another. There are various types of pumps, each with their own unique working principle.

• Centrifugal pumps use a rotating impeller to create a flow of fluid.

• Positive displacement pumps use a mechanical means to move fluid, such as a piston or diaphragm.

• Axial flow pumps move fluid parallel to the axis of rotation.

• Jet pumps use a high-pressure fluid to create a low-pressure suction force.

• Submersible pumps are designed to op...read more

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 include jet pumps, gear pumps, and peristaltic pumps.

• Each...read more

A torque converter is a fluid coupling that transfers power from the engine to the transmission in an automatic vehicle.

• Transfers power from the engine to the transmission

• Uses fluid to transmit power

• Allows the engine to keep running while the vehicle is stopped

• Improves fuel efficiency and smoothness of gear changes

The unit of voltage in electrical is volts (V).

• The unit of voltage is represented by the symbol V.

• Voltage is the difference in electric potential between two points in a circuit.

• Common examples of voltage include 120V in household outlets and 12V in car batteries.

Positive displacement pumps move fluid by trapping a fixed amount and forcing it through the discharge pipe. Negative displacement pumps move fluid by creating a vacuum to draw in and push out the fluid.

• Positive displacement pumps trap a fixed amount of fluid and force it through the discharge pipe

• Examples include gear pumps, piston pumps, and diaphragm pumps

• Negative displacement pumps create a vacuum to draw in and push out the fluid

• Examples include centrifugal pumps and rot...read more

The material used for casing is typically chosen based on factors such as durability, weight, cost, and aesthetics.

• Common materials for casing include plastic, aluminum, steel, and carbon fiber.

• Plastic is often used for its lightweight properties and cost-effectiveness.

• Aluminum is chosen for its strength-to-weight ratio and corrosion resistance.

• Steel is preferred for its durability and impact resistance.

• Carbon fiber is used for its high strength and lightweight characteristic...read more

Strength of material is the ability of a material to withstand external forces without breaking or deforming.

• Strength of material is important in engineering design to ensure safety and reliability of structures and machines.

• Factors that affect strength of material include material composition, shape, size, and loading conditions.

• Common tests used to determine strength of material include tensile, compression, and bending tests.

• Materials with high strength include steel, tita...read more

Friction is the force resisting the relative motion of solid surfaces, gears are of various types like spur, helical, bevel, etc., stress is the force applied to a material, strain is the deformation caused by stress.

• Friction is the force that opposes the motion of one surface over another.

• Types of gears include spur gears, helical gears, bevel gears, worm gears, etc.

• Stress is the force applied to a material per unit area, measured in units like Pascals or psi.

• Strain is the d...read more