ISRO SC/ENG 2010

1) High carbon steel carries carbon percentage of

A. 0.1 to 0.3 %
B. 0.3 to 0.6 %
C. 0.6 to 0.8 %
D. 0.8 to 1.5 %

2) In order to measure/detect materials by non-destructive testing the method generally used is

A. Acoustic emission
B. Infrared radiometer
C. Liquid crystallography
D. Thermochemic point

3) Shock resistance steels should have

A. Low wear resistance
B. High wear resistance
C. Toughness
D. Poor hardenability

4) The cutting speed of the tool in a mechanical shaper is

A. Maximum at the beginning of the cutting stroke
B. Maximum at the end of the cutting stroke
C. Maximum at the middle of the cutting stroke
D. Minimum at the middle of the cutting stroke

5) Which is not correct statement about the function of flux in brazing

A. T o avoid thermal distortion and cracking
B. To dissolve surface oxide coatings which have formed prior to brazing
C. To prevent oxides from forming during the brazing operation on both the base metal and the brazing material
D. To facilitate the wetting process by reducing the viscosity of the melt

6) Investment casting is used for

A. Shapes which are made by difficulty using complex patterns in sand casting
B. Mass production
C. Shapes which are very complex and intricate and can not be cast by any other method
D. There is nothing like investment casting

7) Internal and external threads can be produced on tapered surfaces conveniently by

A. Universal milling machine
B. Plano miller
C. Planetary milling machine
D. lathe

8) Two cutters are mounted on the arbor so that two faces are machined simultaneously in

A. Gang milling
B. Straddle milling
C. Pendulum milling
D. Profile milling

9) The main alloying elements in high speed steel in order of increasing proportion are

A. Vanadium, chromium, tungsten
B. Tungsten, titanium, vanadium
C. Chromium, titanium, vanadium
D. Tungsten, chromium, titanium

10) Cylindrical parts are held on planer by

A. V blocks and arrestors
B. Angle plates
C. V block, T bolts and clamps
D. T bolts and clamps