1. Steel can be hardened quickly by ............. process ?

carburizing

cyaniding

induction hardening

None of these

Answer: induction hardening

Explanation:


2. ............. has excellent resistance to acids ?

Permalloy

Constantan

Hastelloy

Monel metal

Answer: Hastelloy

Explanation:


3. Which of the following properties pertain to cast iron ?

Resistance

Ductility

Wear resistance

Toughness

Answer: Wear resistance

Explanation:


4. Ball bearing races are ?

turned

ground

nickel plated

lapped

Answer: lapped

Explanation:


5. A very coft whisper may have noise level of ?

about 10 db

about 30 db

about 40 db

about 100 db

Answer: about 30 db

Explanation:


6. During the machining operation ?

the chips experience stresses

the chips experience strains

the values of stresses and strains are always calculated for the conditions at the normal plane

the chips experience stresses and strains

Answer: the chips experience stresses and strains

Explanation:


7. The grinding wheel is considered better, if the grinding ratio is ?

maximum

very low

average

minimum

Answer: maximum

Explanation:


8. Jig bushes are ?

the parts of a drill jig through which the cutting tools are operated and located

the locating devices used in jigs along with the fixture

the operating bushes in a jig

the locating and clamping parts of a jig and fixture arrangement

Answer: the parts of a drill jig through which the cutting tools are operated and located

Explanation:


9. The following type of gauge has gauging sections combined on one end ?

progressive gauge

fixed gauge

limit gauge

combination gauge

Answer: progressive gauge

Explanation:


10. Single point thread cutting tool should ideally have ?

positive rake

zero rake

normal rake

negative rake

Answer: normal rake

Explanation: