Related Questions

Initial setting time of cement for asbestos cement products should be not less than
A 30 minutes
B 50 minutes
C 75 minutes
D 90 minutes
The main constituent of cement which is responsible for initial setting of cement is
A Dicalcium silicate
B Tricalcium silicate
C Tricalcium aluminate
D All of the above
For testing compressive and tensile strength of cement, the cement mortar is made by mixing cement and standard sand in the proportions of
A 1 : 2
B 1 : 3
C 1 : 4
D 1 : 6
Ordinary Portland Cement এর Initial Setting Time কত?
A ৫ মিনিট
B ১০ মিনিট
C ৩০ মিনিট
D ৫ ঘণ্টা
To retard the initial setting time of cement, the compound responsible, is
A Tri-calcium silicate
B Gypsum
C Di-calcium silicate
D Tri-calcium aluminate
The initial setting time for ordinary Portland cement as per IS specifications should not be less than
A 10 minutes
B 30 minutes
C 60 minutes
D 600 minutes
STP-তে একটি আদর্শ গ্যাসকে প্রথমে তার প্রাথমিক আয়তনের এক-তৃতীয়াংশে সংকুচিত করা হয়, এবং তারপর প্রসারিত হতে দেওয়া হয় যতক্ষণ না তার চাপ প্রাথমিক চাপের অর্ধেক হয়। উভয় প্রক্রিয়ায় গ্যাসের তাপমাত্রা স্থির থাকে। যদি গ্যাসের প্রাথমিক অভ্যন্তরীণ শক্তি । হয়ে থাকে তাহলে এর চূড়ান্ত অভ্যন্তরীণ শক্তি কত? (An ideal gas at STP is first compressed to one-third of its initial volume and then allowed to expand until its pressure is half the initial pressure. The temperature of the gas remains constant during both the processes. If the initial internal energy of the gas is U, what is its final internal energy?)
A U/3
B U/2
C U
D 2U/3
As per IS specifications, the maximum final setting time for ordinary Portland cement should be
A 30 minutes
B 1 hour
C 6 hours
D 10 hours
Which substance is used to retard the setting action of cement?
A CaO
B Al2O3
C CaSO4.2H2O
D Na2O + K2O
Quick setting cement is produced by adding
A Less amount of gypsum in very fine powdered form
B More amount of gypsum in very fine powdered form
C Aluminium sulphate in very fine powdered form
D Pozzolana in very fine powdered form

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