Materials and Construction Archives

Presence of high amount of silicon in cast iron________________?

Presence of high amount of silicon in cast iron________________?

A. Suppresses the decomposition of Fe3C
B. Increases the formation of graphite
C. Increases the contraction of the metal
D. Reduces its fluidity

Presence of high amount of silicon in cast iron________________? Read More »

Materials and Construction

The main purpose of galvanising iron sheets is to___________________?

Materials and Construction / admin

The main purpose of galvanising iron sheets is to___________________?

A. Harden the surface
B. Increase its glossiness and lustre
C. Prevent the action of water
D. Prevent the action of oxygen

The main purpose of galvanising iron sheets is to___________________? Read More »

Materials and Construction

The temperature at which new grains are formed in the metal is called the ______________ temperature?

Materials and Construction / admin

The temperature at which new grains are formed in the metal is called the ______________ temperature?

A. Eutectic
B. Recrystallisation
C. Upper critical
D. Lower critical

The temperature at which new grains are formed in the metal is called the ______________ temperature? Read More »

Materials and Construction

Which of the following is universally employed as the low expansion metal in the bimetallic thermometer, which is an iron-nickel alloy containing 36% nickel and has very low co-efficient of expansion (1/20th of ordinary metals) ?

Materials and Construction / admin

Which of the following is universally employed as the low expansion metal in the bimetallic thermometer, which is an iron-nickel alloy containing 36% nickel and has very low co-efficient of expansion (1/20th of ordinary metals) ?

A. Invar
B. Constantan
C. Chromel
D. Alumel

Materials and Construction

Caustic soda can be stored in _____________ drums?

Materials and Construction / admin

Caustic soda can be stored in _____________ drums?

A. Steel
B. Cast iron
C. Brass
D. Gun metal

Caustic soda can be stored in _____________ drums? Read More »

Materials and Construction

The material of construction of pressure mills used for squeezing out the juice from sugar cane is__________________?

Materials and Construction / admin

The material of construction of pressure mills used for squeezing out the juice from sugar cane is__________________?

A. Stainless steel
B. Cast iron
C. Mild steel
D. Monel

The material of construction of pressure mills used for squeezing out the juice from sugar cane is__________________? Read More »

Materials and Construction

Caustic soda is produced in a mercury cell having anode and cathode made respectively of moving mercury and_________________?

Materials and Construction / admin

Caustic soda is produced in a mercury cell having anode and cathode made respectively of moving mercury and_________________?

A. Moving mercury and graphite
B. Graphite and moving mercury
C. Moving mercury and carbon
D. Moving mercury and crimped steel wire

Caustic soda is produced in a mercury cell having anode and cathode made respectively of moving mercury and_________________? Read More »

Materials and Construction

Most common stainless steel type 316, which is highly resistant to corrosion contains______________?

Materials and Construction / admin

Most common stainless steel type 316, which is highly resistant to corrosion contains______________?

A. 16-13% Cr 10-14% Ni and 2-3% Mo
B. 20-22% Cr, and 8-10% Ni
C. 2-4% Cr, 22% NI and 2-4% Mo
D. None of these

Most common stainless steel type 316, which is highly resistant to corrosion contains______________? Read More »

Materials and Construction

Galvanised iron is___________________?

Materials and Construction / admin

Galvanised iron is___________________?

A. Harder
B. Protected from rusting
C. Alumina coated iron
D. None of these

Galvanised iron is___________________? Read More »

Materials and Construction

Galvanising is not a zinc diffusion process. A zinc diffusion process is termed as_____________________?

Materials and Construction / admin

Galvanising is not a zinc diffusion process. A zinc diffusion process is termed as_____________________?

A. Sherardizing
B. Parkerising
C. Anodising
D. None of these

Galvanising is not a zinc diffusion process. A zinc diffusion process is termed as_____________________? Read More »

Materials and Construction