Rubber MCQs : Here you will find MCQ Questions related to "Rubber" in Civil Engineering. These Rubber MCQ Questions Will help you to improve your Civil Engineering knowledge and will prepare you for various Examinations like Competitive Exams, Placements, Interviews and other Entrance Exmaniations.
Question 1
Rubber primarily consists of?
A. Polyprene
B. Neoprene
C. Thiokol
D. Isoprene
View Answer
Ans : D
Explanation: Rubber primarily consists of Isoprene. It may contain certain impurities like organic compounds and water.
Question 2
Rubber is not water-proof.
A. TRUE
B. FALSE
C. Can be true or false
D. Can not say
View Answer
Ans : B
Explanation: Rubber consists of mainly hydrocarbons. It also contains resins, fatty acids and sterols. These provide water proofing quality to rubber.
Question 3
What is added to rubber to make it a thermosetting polymer?
A. Potassium
B. Sulphur
C. Sodium
D. Phosphorous
View Answer
Ans : B
Explanation: The process of vulcanization makes rubber get converted into a heavily cross-linked, insoluble and infusible compound. It is done by adding sulphur and litharge (PbO).
Question 4
Rubber latex is used for:
A. Bonding wood plys
B. Bonding rubber to walls
C. Bonding rubber to wood
D. Bonding tools
View Answer
Ans : C
Explanation: It is a solution of rubber hydrochloride. It has a sticky texture and has excellent adhesive property
Question 5
Good compressive strength results were obtained when __________ of sand was replaced by rubber.
A. 0.25
B. 0.3
C. 0.35
D. 0.4
View Answer
Ans : A
Explanation: Good compressive strength results were obtained when 25% of sand was replaced by rubber.
Question 6
Rubber seed oil can be used as?
A. Fuel
B. Medicine
C. Varnish
D. Paint
View Answer
Ans : D
Explanation: It can be used as a semi-drying oil in paints. It partially hardens when exposed to air unlike other drying oils in the paint.
Question 7
When rubber is subjected to a load, it deforms.
A. TRUE
B. FALSE
C. Can be true or false
D. Can not say
View Answer
Ans : A
Explanation: When rubber is subjected to a load, it deforms. On removal of the load, it returns back to its original shape and size. This property is resilience.
Question 8
Synthetic rubber also known as ?
A. Gum rubber
B. Caoutchouc
C. Buna-S
D. Gum elastic
View Answer
Ans : C
Explanation: It is sold under different names. Some of them are neoprene, buna-s, hypalon, silastic, etc. Gum rubber, caoutchouc and gum elastic are names used for natural rubber
Question 9
Solid rubber has a hardness of ____________ duro.
A. 10
B. 20
C. 30
D. 40
View Answer
Ans : D
Explanation: Hardness is measured in terms of durometer on a shore scale. Shore A is used for soft to medium-hard rubber. Solid rubber has a hardness of 40 duro.
Question 10
Rubber wood is eco-friendly and easily available.
A. TRUE
B. FALSE
C. Can be true or false
D. Can not say
View Answer
Ans : A
Explanation: Unlike other trees have grown solely for timber purpose, rubber tree provides latex also. After 25-30 years, its latex yields become lower and they are felled. They are replanted after that.