Practice Test: Question Set - 02
1. Which of the following impurity in cast iron makes it hard and brittle?
- (A) Silicon
- (B) Sulphur
- (C) Manganese
- (D) Phosphorus
2. Tensile strength of steel can be safely increased by
- (A) Adding carbon up to
2.8%
- (B) Adding carbon up to 6.3%
- (C) Adding carbon up to 0.83%
- (D) Adding small quantities of copper
3. Which of the following metal is used for nuclear energy?
- (A) Uranium
- (B) Thorium
- (C) Niobium
- (D) All of these
4. Cemented carbide tools are not found to be suitable for cutting
- (A) Brass
- (B) Cast iron
- (C) Aluminium
- (D) Steel
5. Y-alloy contains
- (A) 3.5 to 4.5%
copper, 0.4 to 0.7% magnesium, 0.4 to 0.7% manganese and rest aluminium
- (B) 3.5 to 4.5%
copper, 1.2 to 1.7% manganese, 1.8 to 2.3% nickel, 0.6% each of silicon,
magnesium and iron, and rest aluminium
- (C) 4 to 4.5%
magnesium, 3 to 4% copper and rest aluminium
- (D) 5 to 6% tin,
2 to 3% copper and rest aluminium
6. Amorphous material is one
- (A) In which atoms align
themselves in a geometric pattern upon solidification
- (B) In which there is no definite atomic
structure and atoms exist in a random pattern just as in a liquid
- (C) Which is not attacked
by phosphorous
- (D) Which emits fumes on
melting
7. According to Indian standard specifications, SG 400/15 means
- (A) Spheroidal
graphite cast iron with B.H.N. 400 and minimum tensile strength 15 MPa
- (B) Spheroidal
graphite cast iron with minimum tensile strength 400 MPa and 15 percent
elongation
- (C) Spheroidal
graphite cast iron with minimum compressive strength 400 MPa and 15 percent
reduction in area
- (D) None
of the above
8. Brass (alloy of copper and zinc) is an example of
- (A) Substitutional solid
solution
- (B) Interstitial solid
solution
- (C) Intermetallic
compounds
- (D) All of the above
9. In process annealing, the hypo eutectoid steel is
- (A) Heated
from 30°C to 50°C above the upper critical temperature and then cooled in still
air
- (B) Heated
from 30°C to 50°C above the upper critical temperature and then cooled suddenly
in a suitable cooling medium
- (C) Heated from
30°C to 50°C above the upper critical temperature and then cooled slowly in the
furnace
- (D) Heated below
or closes to the lower critical temperature and then cooled slowly
10. Pick up the wrong statement
- (A) Aluminium in steel
results in excessive grain growth
- (B) Manganese in steel
induces hardness
- (C) Nickel and chromium
in steel helps in raising the elastic limit and improve the resilience and
ductility
- (D) Tungsten in steels improves magnetic
properties and hardenability
11. A coarse grained steel
- (A) Is
less tough and has a greater tendency to distort during heat treatment
- (B) Is
more ductile and has a less tendency to distort during heat treatment
- (C) Is
less tough and has a less tendency to distort during heat treatment
- (D) Is
more ductile and has a greater tendency to distort during heat treatment
12. Pick up the wrong statement Nickel and chromium in steel help in
- (A) Providing corrosion
resistance
- (B) Improving machining
properties
- (C) Providing high
strength at elevated temperatures
- (D) Raising the elastic
limit
13. Normalising of steel is done to
- (A) Refine
the grain structure
- (B) Remove
strains caused by cold working
- (C) Remove
dislocations caused in the internal structure due to hot working
- (D) All
of the above
14. Steel contains
- (A) 80% or more iron
- (B) 50% or more iron
- (C) Alloying elements
like chromium, tungsten nickel and copper
- (D) Elements like
phosphorus, sulphur and silicon in varying quantities
15. Which of the following has a fine gold colour and is used for imitation jewellery?
- (A) Silicon
bronze
- (B) Aluminium
bronze
- (C) Gun
metal
- (D) Babbitt
metal
Blogger Comment
Facebook Comment