Civil Engineering MCQs

Page No. 295

The main constituent of cement which is responsible for initial setting of cement is_________________?


adicalcium silicate

✖


btricalcium silicate

✖


ctricalcium aluminate

✓


dall of the above

✖


View Answer tricalcium aluminate

The main constituent which imparts hydraulicity to hydraulic lime is______________?


acalcium oxide

✖


b silica

✖


cclay

✓


dwater

✖


View Answer clay

Assertion A : Pure lime takes a long time to develop adequate strength. Reason R : Pure lime has slow hardening characteristics. Select your answer according to the coding system given below ?


aBoth A and R are true and R is correct explanation of A

✓


bBoth A and R are true and R is not a correct explanation of A

✖


cA is true but R is false

✖


dA is false but R is true

✖



Study the following statements. (1) Hydraulic lime is suitable for white washing, (2) Fat lime is suitable for whitewashing, (3) Hydraulic lime is suitable for making mortar, (4) Fat lime is suitable for making mortar. The correct answer is______________?


a(1) and (4)

✖


b(2) and (3)

✓


c(1) and (2)

✖


d(3) and (4)

✖


View Answer (2) and (3)

As per IS specifications, the maximum final setting time for ordinary Portland cement should be_______________?


a30 minutes

✖


b1 hour

✖


c6 hours

✖


d10 hours

✓


View Answer 10 hours

The constituent of cement which is responsible for all the undesirable properties of cement is____________?


adicalcium silicate

✖


b tricalcium silicate

✖


ctricalcium aluminate

✓


dtetra calcium alumino ferrite

✖


View Answer tricalcium aluminate

The initial setting time for ordinary Portland cement as per IS specifications should not be less than_____________?


a10 minutes

✖


b30 minutes

✓


c60 minutes

✖


d600 minutes

✖


View Answer 30 minutes

Le Chatelier’s device is used for determining the_______________?


asetting time of cement

✖


b soundness of cement

✓


c tensile strength of cement

✖


dcompressive strength of cement

✖



The main ingredients of Portland cement are________________?


a lime and silica

✓


blime and alumina

✖


csilica and alumina

✖


dlime and iron

✖


View Answer lime and silica

Hydraulic lime is obtained by_______________?


aburning of lime stone

✖


bburning of kankar

✓


cadding water to quick lime

✖


dcalcination of pure clay

✖


View Answer burning of kankar

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