Welding and Fluid Mechanics Quiz

Which of the following correctly represents the unit of Rockwell hardness?

• BHN

• HRC

• VHN

• RW

Porosity in welds is caused due to

• Excessive welding speed

• Presence of moisture or gas entrapment

• Improper electrode angle

• High welding current

Steel is an alloy of Iron and Undercut in welding refers to:

• A groove melted into the base metal next to the weld toe

• A crack in the weld

• A type of filler metal

• Improper electrode selection

Which defect is caused by improper cleaning of the weld joint before welding?

• Hot cracking

• Slag inclusion

• Undercut

• Lack of fusion

Which of the following is a property of fluids?

• Fixed shape

• Incompressibility

• Ability to flow

• Fixed volume

The property of a fluid that resists the relative motion between adjacent layers is called ______________

• Density

• Surface tension

• Viscosity

• Pressure

Which of the following is the correct unit of density?

• N/m³

• kg/m³

• m³/kg

• kg.m/s²

The SI Unit of temperature is _______________

• Meters

• Foot

• Pound

• Kelvin

A piston and cylinder arrangement in an internal combustion engine is an example of which type of kinematic pair?

• Turning pair

• Sliding pair

• Rolling pair

• Spherical pair

Which of the following is an inversion of a single slider crank chain?

• Whitworth quick return mechanism

• Four-bar linkage

• Scotch yoke mechanism

• Beam engine