Materials & Construction Mcqs for Chemical - Set 4

1)   Ceramic materials__________________?

a. Are exemplified by clay and mica
b. Are poor electrical conductors due to lack of free electrons
c. Never exhibit polymorphism
d. All A., B. and C.
Answer  Explanation 

ANSWER: All A., B. and C.

Explanation:
No explanation is available for this question!


2)   Duralumin is an alloy of_________________?

a. Aluminium, copper and manganese
b. Aluminium, nickel and silicon
c. Aluminium and nickel
d. None of these
Answer  Explanation 

ANSWER: Aluminium, copper and manganese

Explanation:
No explanation is available for this question!


3)   Hardening of steel is not possible unless it is heated ______________ critical point?

a. Above the highest
b. Above the lowest
c. Between the first & second
d. Between the second & third
Answer  Explanation 

ANSWER: Above the lowest

Explanation:
No explanation is available for this question!


4)   DDT is shipped in_________________?

a. Stainless steel containers
b. Paper bags
c. Fibre drums
d. Either B. or C.
Answer  Explanation 

ANSWER: Either B. or C.

Explanation:
No explanation is available for this question!


5)   ______________ is not a case hardening process?

a. Carburising
b. Nitriding
c. Cyaniding
d. Annealing
Answer  Explanation 

ANSWER: Annealing

Explanation:
No explanation is available for this question!


6)   High degree of toughness is a must for__________________?

a. High speed steel
b. Shock resisting steel
c. Cold work tool steel
d. None of these
Answer  Explanation 

ANSWER: Shock resisting steel

Explanation:
No explanation is available for this question!


7)   Which of the following is the easiest to bend ?

a. Steel
b. Stainless steel
c. Cast iron
d. Wrought iron
Answer  Explanation 

ANSWER: Wrought iron

Explanation:
No explanation is available for this question!


8)   Vessels made of _____________ can be used to store dry chlorine?

a. Thermoplastic materials
b. Nickel
c. Steel or iron
d. None of these
Answer  Explanation 

ANSWER: Steel or iron

Explanation:
No explanation is available for this question!


9)   Electronic structure of a material is generally studied by__________________?

a. Metallurgical microscope
b. Electron diffraction
c. Spectroscopic techniques
d. X-ray
Answer  Explanation 

ANSWER: Spectroscopic techniques

Explanation:
No explanation is available for this question!


10)   Dip stick used for measuring the level of petro fuels (e.g. petrol, diesel, fuel oil etc.) in the storage tank is usually made of_________________?

a. Brass
b. Copper
c. High carbon steel
d. Aluminium
Answer  Explanation 

ANSWER: Brass

Explanation:
No explanation is available for this question!


11)   Gunmetal and bronze are not corroded by the action of__________________?

a. Wet chlorine
b. Synthetic detergent solution
c. Hydrochloric acid (10%)
d. Nitric acid (< 25%)
Answer  Explanation 

ANSWER: Synthetic detergent solution

Explanation:
No explanation is available for this question!


12)   Hydrochloric acid is _______________ corrosive to common metals?

a. Least
b. Not
c. Mildly
d. Highly
Answer  Explanation 

ANSWER: Highly

Explanation:
No explanation is available for this question!


13)   Invar used in thermocouples is an alloy of nickel and________________?

a. Iron
b. Copper
c. Chromium
d. Lead
Answer  Explanation 

ANSWER: Iron

Explanation:
No explanation is available for this question!


14)   Dead mild steel, which contains 0.10 to 0.15 percent carbon is used for making________________?

a. Shafts
b. Flanges
c. Gears
d. Shear blades
Answer  Explanation 

ANSWER: Flanges

Explanation:
No explanation is available for this question!


15)   Softness of silver can be converted into hardness by alloying it with small quantity of_________________?

a. Copper & nickel
b. Zinc
c. Aluminium
d. Tin
Answer  Explanation 

ANSWER: Copper & nickel

Explanation:
No explanation is available for this question!


16)   A material capable of undergoing large permanent deformation, when subjected to compression is termed as___________________?

a. Malleable
b. Ductile
c. Brittle
d. None of these
Answer  Explanation 

ANSWER: Malleable

Explanation:
No explanation is available for this question!


17)   The behaviour of visco-elastic material is time dependent. This behaviour is common in _____________ materials?

a. Non-crystalline solid
b. Crystalline
c. Rubbery
d. Non-crystalline organic polymeric
Answer  Explanation 

ANSWER: Non-crystalline organic polymeric

Explanation:
No explanation is available for this question!


18)   An alloy used as thermocouple material comprises of 40% nickel and 60% copper. It is called____________________?

a. Constantan
b. Kanthal
c. Chromel
d. German silver
Answer  Explanation 

ANSWER: Constantan

Explanation:
No explanation is available for this question!


19)   Constantan is an alloy of____________________?

a. Cu (55%) & Sn (45%)
b. Cu (55%) & Ni (45%)
c. Pt (95%) & Rh (10%)
d. Fe (80%) & Ni (20%)
Answer  Explanation 

ANSWER: Cu (55%) & Ni (45%)

Explanation:
No explanation is available for this question!


20)   Tempering of steel is done to make it________________?

a. Brittle
b. Hard
c. Rollable
d. Soft
Answer  Explanation 

ANSWER: Soft

Explanation:
No explanation is available for this question!


21)   Which of the following has the highest compressive strength ?

a. Wrought iron
b. Cast iron
c. Mild steel
d. High carbon steel
Answer  Explanation 

ANSWER: High carbon steel

Explanation:
No explanation is available for this question!


22)   Purity of electrical grade aluminium should be ≥ _____________ percent?

a. 95
b. 99.5
c. 85
d. 90
Answer  Explanation 

ANSWER: 99.5

Explanation:
No explanation is available for this question!


23)   The metals occuring at the lower most position in the electromotive series____________________?

a. Do not resist corrosion
b. Resist corrosion very strongly
c. Are very brittle
d. Are heat insulators
Answer  Explanation 

ANSWER: Resist corrosion very strongly

Explanation:
No explanation is available for this question!


24)   Ability of a material to absorb energy in deformation in the plastic range is characterised as its____________________?

a. Ductility
b. Toughness
c. Creep
d. Resilience
Answer  Explanation 

ANSWER: Toughness

Explanation:
No explanation is available for this question!


25)   Austenitic manganese steel used for making jaws of crushing machines contains about ______________ percent manganese?

a. 1.5-2
b. 3.5-4.5
c. 7-9
d. 12-14
Answer  Explanation 

ANSWER: 12-14

Explanation:
No explanation is available for this question!


26)   Chromel (Nichrome) is an alloy of_____________________?

a. Chromium and molybdenum
b. Nickel and chromium
c. Molybdenum and nickel
d. Chromium and aluminium
Answer  Explanation 

ANSWER: Nickel and chromium

Explanation:
No explanation is available for this question!


27)   Babbitt metal used for making bearings should have_____________________?

a. High co-efficient of friction between journal and bearing
b. Ability to retain lubricant on its surface
c. Low co-efficient of friction between journal and bearing
d. Both B. & C.
Answer  Explanation 

ANSWER: High co-efficient of friction between journal and bearing

Explanation:
No explanation is available for this question!


28)   Thermosetting resins are those polymers, which__________________?

a. Do not increase in plasticity with rise in temperature
b. Allow slip to occur between molecules
c. Do not take on a permanent set
d. None of these
Answer  Explanation 

ANSWER: Do not increase in plasticity with rise in temperature

Explanation:
No explanation is available for this question!


29)   Pick the odd man out of the following?

a. Calorising
b. Pack carburising
c. Nitriding
d. Cyaniding
Answer  Explanation 

ANSWER: Calorising

Explanation:
No explanation is available for this question!


30)   A material no longer behaves elastically beyond_________________?

a. Plastic limit
b. Limiting load
c. Elastic limit
d. Breaking load
Answer  Explanation 

ANSWER: Elastic limit

Explanation:
No explanation is available for this question!