Practice Test: Question Set - 01
1. Metal cutting by oxy-acetylene flame is accomplished by the __________ of the metal.
- (A) Burning
- (B) Intensive
oxidation
- (C) Evaporation
- (D) None of
these
2. The only suitable method for hardening the low carbon steel is case hardening. Which of the following is a case hardening process?
- (A) Cyaniding
- (B) Sherardizing
- (C) Spheroidising
- (D) None
of these
3. Filler material used in welding should have __________ as compared to the parent metal to be welded.
- (A) Lower
melting temperature
- (B) Same melting
temperature
- (C) Same
composition
- (D) Both 'b'
& 'c'
4. The temperature at which the magnetic property of iron disappears (i.e., it becomes non-magnetic) and its electrical conductivity & specific heat also changes, is called the 'Curie point', which is __________ °C.
- (A) 768
- (B) 908
- (C) 1400
- (D) 1539
5. About __________ ton of coke is required in a cupola to produce one ton of casting.
- (A) 0.03
- (B) 0.3
- (C) 0.8
- (D) 1.5
6. Referring to the periodic table of elements, it is found that with increasing atomic number. The atomic size in the same
- (A) Period
increases
- (B) Period
decreases
- (C) Group
increases
- (D) Both 'b'
& 'c'
7. Satellites burn off during re-entry to earth's atmosphere, because of the
- (A) Combustion
with air
- (B) Gravitational
pull by earth
- (C) Friction
with earth's atmosphere
- (D) Loss in
weight of the satellite
8. Joining of thin foils is preferred to be done by
- (A) Gamma rays
- (B) X-rays
- (C) Microwaves
- (D) Gas welding
9. Which of the following is the correct nature of shear stress distribution along the cross section in a horizontal circular pipe under steady state fluid flow condition?
10. With increase in temperature, the electrical conductivity of semiconductors
- (A) Increases
- (B) Decreases
- (C) Remain
constant
- (D) Either
(a) or (b), depends on the type of semi-conductor
11. Laser welding is widely employed in the __________ industries.
- (A) Electronic
- (B) Structural
- (C) Process
- (D) Heavy
12. Which of the following approaches the ideal gas behavior most closely?
- (A) Wet steam
- (B) Saturated
steam
- (C) Superheated
steam
- (D) Saturated
water
13. Lap joints are preferred over butt joints in soldering/brazing, because these joints are
- (A) Weaker
in tension but stronger in shear
- (B) Weaker in
shear but stronger in tension
- (C) Stronger
in both shear and tension
- (D) The
lap joints are easily made
14. Normalising does not __________ of a metal.
- (A) Improve
machinability & tensile strength
- (B) Remove
internal stresses
- (C) Refine the
structure
- (D) Remove
strains caused by cold working
15. Which of the following hardness tests does not measure the indentation hardness of metals and alloys?
- (A) Vickers
hardness test
- (B) Shore scleroscope test
- (C) Brinell
hardness test
- (D) Rockwell
hardness test