Building Materials
If the furnace is provided with insufficient fuel at low temperatures, the type of pig iron produced, is called

Grey or foundry pig
White or forge pig
Bessemer pig
Mottled pig

ANSWER DOWNLOAD EXAMIANS APP

Building Materials
Acrylic sheets

Possess 10 to 17 times greater breakage resistance than that of glass of equivalent thickness
Possess the light transmission rate of 93%
Are generally unaffected by most household detergents
All of these

ANSWER DOWNLOAD EXAMIANS APP

Building Materials
When a brick is immersed in water for 24 hours and then dried, if

10 percent surface is covered with grey or white deposits, the brick has slight efflorescence
No grey or white deposits appear on the surface, the brick is free from soluble salts
All listed here
50 percent surface is covered with grey or white deposits, the brick has serious efflorescence

ANSWER DOWNLOAD EXAMIANS APP

Building Materials
The basic purpose of a retarder in concrete is

To decrease the initial setting time of cement paste in concrete
To increase the initial setting time of cement paste in concrete
To render the concrete more water tight
To improve the workability of concrete mix

ANSWER DOWNLOAD EXAMIANS APP