PVC MCQs : Here you will find MCQ Questions related to "PVC" in Civil Engineering. These PVC 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
Properties of PVC resins can be altered by adding certain additives to it. This process is called?
A. Reformation
B. Recasting
C. Compounding
D. Curing
View Answer
Ans : C
Explanation: Properties of PVC resins can be altered by adding certain additives to it. This process is called compounding. It is thus possible to attain rigid PVC products.
Question 2
Which of the following is resistant to attack by kerosene oil, acid and chemicals?
A. Rubber
B. PVC
C. Varnish
D. Glass
View Answer
Ans : B
Explanation: PVC is resistant to attack by kerosene oil, acid and chemicals. It is water proof too. Hence it is widely used for pipe manufacture for carrying sewage and rain water.
Question 3
In how many forms does PVC come?
A. 2
B. 3
C. 4
D. 5
View Answer
Ans : A
Explanation: The 2 forms are rigid (RPVC) and flexible PVC. RPVC is used in the construction of pipes, bottles, cards, etc. Flexible PVC is used in cables, wires, inflatable products, etc
Question 4
RPVC can be made softer and more flexible using:
A. Reducers
B. Conditioners
C. Oil
D. Plasticizers
View Answer
Ans : D
Explanation: Addition of plasticizers makes RPVC softer and more flexible. Most commonly used form is phthalates.
Question 5
What is the Limiting Oxygen Index (LOI) of PVC?
A. 25% or more
B. 35% or more
C. 45% or more
D. None of the above
View Answer
Ans : C
Explanation: Limiting Oxygen Index is a minimum concentration of oxygen that will support combustion of a polymer. It is expressed as a percentage. PVC has good flame retardancy. Air has 20% oxygen, PVC has LOI of 45% or more.
Question 6
PVC cement is used to attach ____________ PVC pipes.
A. 1
B. 2
C. 3
D. 4
View Answer
Ans : B
Explanation: PVC cement is used to attach 2 PVC pipes.
Question 7
Pure PVC is _______ in colour
A. white
B. black
C. orange
D. green
View Answer
Ans : A
Explanation: Pure PVC is white in colour. It can be coloured according to colour scheme followed in various countries for electrical usage, plumbing, etc.
Question 8
________ is added to increase stability and work ability of PVC pipes.
A. Lead
B. VCM
C. Phthalates
D. Sulphur
View Answer
Ans : A
Explanation: Lead is added to increase stability and work ability of PVC pipes. It is found to leach into potable water from the surface of PVC pipes, hence, contaminating it.
Question 9
__________ process is most commonly employed.
A. Feedstock
B. Mechanical
C. VinyLoop
D. Chemical
View Answer
Ans : C
Explanation: VinyLoop process is most commonly employed. It involves filtering out composite materials and grinding it down to PVC granules.
Question 10
PVC plug and cap are used to seal the end of a pipeline
A. TRUE
B. FALSE
C. Can be true or false
D. Can not say
View Answer
Ans : A
Explanation: PVC plug and cap are used to seal the end of a pipeline. They have a threaded end and the other end is closed.