Equipment Operation and Friction Quiz

Main equipment is:

• equipment in which the main chemical and technological processes of product production are carried out

• equipment whose failure leads to the shutdown of the technological line

• the main part of the equipment on which other components are assembled and installed

• equipment of the plant's repair workshops

• equipment used for transportation of raw materials

Friction occurring on frictional surfaces in the complete absence of impurities is called:

• Rolling friction

• Sliding friction

• Pure friction

• Coriolis friction

• Cam friction

At what imbalance is the center of gravity of a part or assembly located outside the axis of rotation?

• During rotation

• Static support

• Static moment

• Torque

• Static imbalance

Friction observed between solid surfaces with insufficient lubrication (film thickness not more than 0.5 μm):

• Semi-dry friction

• Pure fluid friction

• Semi-fluid friction

• Pure complete friction

• Pure incomplete friction

Friction occurring with abundant lubrication:

• Semi-dry friction

• Fluid friction

• Semi-fluid friction

• Pure friction

• Friction

Friction that occurs with proper geometric shapes of bodies:

• Boundary friction

• Pure fluid friction

• Semi-fluid friction

• Pure semi-fluid friction

• Organic-fluid friction

Electrodes used for welding non-ferrous metals:

• Steel

• Copper

• Carbon

• Thin

• Non-ferrous

Electrodes used for resurfacing worn-out parts:

• ENR

• ED

• EM

• EH

• E

To obtain a hard, wear-resistant layer, the following is used:

• Alloy of cobalt, chromium, and iron

• Alloy of chromium and vanadium

• Alloy of chromium and nickel

• Alloy of chromium and titanium

• Chromium cast iron

Cause of failure of punching dies:

• Dulling of cutting edges

• Soft material

• Saw dulling

• Material wear

• Edge sticking