The fermenter used for the production of ethyl alcohol from molasses is made of________________?

A. Wood
B. Concrete
C. Copper bearing steel
D. Porcelain

Silico-manganese steels (containing 0.7% Mn, 0.5% C and 2% Si)___________________?

A. Do not require heat treatment for any of its applications
B. Are used for leaf and coiled springs
C. Do not have good resilience properties
D. Is tempered at 850°C

______________ is never shipped in glass carboys?

A. Ammonia
B. Acetic acid
C. Phenol
D. Formaldehyde

Interchain forces are the weakest in case of________________?

A. Plastics
B. Fibres
C. Elastomers
D. Both rubber & elastomers

Which of the following heat treatment processes is used for softening the hardened material ?

A. Normalising
B. Tempering
C. Annealing
D. None of these

Carbon percentage in medium carbon steel is around__________________?

A. 0.1 to 0.35
B. 0.35 to 0.5
C. 0.8 to 1.4
D. 1 to 1. 5

Aluminium storage vessel can be used to store________________?

A. Aqua regia
B. Ferrous sulphate
C. Hydrochloric acid (10%)
D. None of these

______________ possesses viscoelastic properties?

A. Cork
B. Glass
C. Graphite
D. Rubber

The range of Mho’s scale of hardness is from________________?

A. 1 to 15
B. 1 to 8
C. 1 to10
D. 0 to 10