Power Plant - Day 7

1. Permanent deformation or strain may occur without fracture:

A. malleability

B. elasticity

C. plasticity

D. ductility

2. A property of material which relates the lateral strain to the longitudinal strain:

A. stress

B. strain

C. Poison’s ratio

D. strength

3. Recommended best cutting angle of drill for work on steel or cast iron is ____ degrees.

A. 59

B. 48

C. 63

D. 50

4. Deals only with the motion of bodies without reference to the forces that cause them:

A. dynamics

B. kinematics

C. kinetics

D. static

5. Most effective alloying element for reducing brittleness of steel at very low temperature:

A. manganese

B. molybdenum

C. nickel

D. silicon

6. For a high corrosion resistant stainless steel, what minimum chromium content is required?

A. 4.3%

B. 8%

C. 1.1%

D. 5.8%

7. The phenomenon of continuous stretching under load even if the stress is less than the yield point:

A. creep

B. elasticity

C. ductility

D. plasticity

8. Killed steel is always associated with:

A. manganese

B. silicon

C. phosphorus

D. sulfur

9. Good stabilizer in stainless steel

A. columbium

B. titanium

C. tantalum

D. all of these

10. It is considered semi-solid lubricant:

A. lube oil

B. graphite

C. grease

D. all of these