491. Very high sulphur in pig iron makes ___________________?
A. Its casting unsound
B. Its hard and machinable
C. Its brittle and malleable
D. All A., B. & C.

492. The material of construction of bearings is__________________?
A. Cast iron
B. Babbitt metal
C. Pig iron
D. Steel

493. Duriron is__________________?
A. Acid resistant, brittle and very hard
B. High silicon iron
C. Prone to breakage due to thermal expansion because of its very high co-efficient of thermal
expansion
D. All A., B. and C.

494. Biological shield in a nuclear power reactor is made of________________?
A. Concrete
B. Steel
C. Cadmium
D. Zircaloy

495. Combination of metals and ceramics are called___________________?
A. Metalloy
B. Cermets
C. Pellets
D. Non-crystalline ceramics

496. Dry chlorine can be handled in a vessel made of__________________?
A. Iron or steel
B. PVC
C. Nickel
D. Brass

497. Vycor, a widely used material for making ‘thermal wells’ in temperature measurement, is a_______________?
A. Cermet
B. Glass
C. Thermosetting plastic
D. Metallic alloy

498. Galvanising is generally done on___________________?
A. Non-ferrous metals
B. Low carbon steel
C. Stainless steel
D. Cast iron

499. Wrought iron is a suitable material of construction for handling _____________ solutions?
A. Dilute acidic
B. Concentrated acidic
C. Alkalis & alkaline
D. None of these

500. Anodic material used for the cathodic protection of underground buried steel pipeline is_________________?
A. Nickel or copper
B. Zinc or magnesium
C. Bronze
D. Brass

NOTE
IF YOU THINK ANY OF THE MCQ ABOVE IS WRONG.
PLEASE COMMENT WITH CORRECT ANSWER AND ITS DETAIL EXPLANATION IN COMMENT BOX.
THANK YOU

Leave a Reply