The Coffee Break Quiz - A challenging selection of General Engineering questions and answers 
sometimes you just don't know what you don't know, but you're sure that you did know or that you should know and when you see the answers you know that once upon a time you probably did know !

Challenge your colleagues - can they answer more than you ?

1. In fluid dynamics, a vortex is a region within a fluid where the flow is mostly a reciprocal motion about an imaginary axis - True or False
2. In Euclidean plane geometry, a quadrilateral is a polygon with eight sides and eight corners - True or False
3. In Mechanical Engineering - When cutting a screw thread into a hole, the hole will always be drilled a larger diameter than the nominal thread size - True or False
4. The joule is a derived unit of luminous intensity in the International System of Units True or False
5. The first known description of a binary numeral system was recorded by an Indian scholar in approximately the 4th century BC - True or False
6. Flame Hardening is a processes in which the surface of a steel component is heated to a high temperature then allowed to cool slowly - True or False
7. Optics is the branch of physics which involves the behaviour and properties of Sound - True or False
8. A toggle bolt is a fastener typically used for for hanging items on hollow walls such as drywall . - True or False
9. The Apollo program was the second human spaceflight program carried out by NASA - True or False
10. The number 10 to the power of 24 has the unit symbol "yotta" - True or False

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ANSWERS
1) False - it is where the flow is mostly a spinning motion about an imaginary axis  2) False - it is a a polygon  with four sides and four corners  3) False - the hole needs to be drilled a smaller diameter  4) False - it is a derived unit of energy , work , or amount of heat  5) True  6) False - it is cooled rapidly  7) False - it is Light  8) True  9) False - it was the Third  10) True