1. The time required for seasoning of timber in kiln seasoning is ?

2 to 5 days

5 to 10 days

10 to 20 days

20 to 40 days

Answer: 10 to 20 days

Explanation:


2. The paint which has high reflective property is ?

cellulose paint

casein paint

bronze paint

enamel paint

Answer: bronze paintx

Explanation:


3. The best primer used for structural steel work is ?

white lead

red lead

zinc oxide

iron oxide

Answer: red lead

Explanation:


4. The timber whose thickness is less than 5 cm and the width exceeds 12 cm, is called a ?

board

plank

batten

log

Answer: board

Explanation:


5. According to Indian standard specifications, the full strength of concrete is achieved after ?

7 days

14 days

21 days

28 days

Answer: 28 days

Explanation:


6. During the process of burning limestone, clay forms certain compound which ?

gives hydraulic lime

gives power of quick setting

does not allow to be dissolved in the outside water when used in damp situations

all of the above

Answer: all of the above

Explanation:


7. The cementing property in cement is mainly due to ?

lime

silica

iron oxide

alumina

Answer: lime

Explanation:


8. The good clay for making bricks is ?

unweathered clay

weathered clay

silted soil

black cotton soil

Answer: weathered clay

Explanation:


9. Quick lime on reaction with water gives ?

hydraulic lime

slaked lime

hydrated lime

poor lime

Answer: slaked lime

Explanation:


10. Which of the following statement is correct ?

The fat lime swells two to three times of its original volume during slaking

The poor lime is of pure white colour

The feebly hydraulic lime slakes sluggishly

all of the above

Answer: The fat lime swells two to three times of its original volume during slaking

Explanation: