This set of Design of RC Structures Multiple Choice Questions & Answers (MCQs) focuses on “Neutral Axis of T Beam”.
1. Maximum possible value of compacting factor for fresh concrete is ____
a) 0.5
b) 1
c) 1.5
d) 2
View Answer
Explanation: Compaction factor = weight of partially compacted concrete / weight of fully compacted concrete.
2. Modulus of elasticity of M25 grade concrete in MPa is ____
a) 25000
b) 36000
c) 45600
d) 54000
View Answer
Explanation: E = 5000 fck1/2
= 25000
3. The permissible tensile stress in concrete made of M25 concrete is _______
a) 3.5 N/mm2
b) 60 N/mm2
c) 2.5 N/mm2
d) None
View Answer
Explanation: fcr = 0.7 fck1/2
=2.5 N/mm2
4. Portland cement is manufactured by burning in a kiln the following materials.
a) Limestone and alumina
b) Limestone and clay
c) Limestone and sand
d) Lime and clay
View Answer
Explanation: Raw materials used in the manufacture of cement are classified into two broad categories, i.e. Argillaceous and calcareous.
5. Setting time of cement sample is tested by ____
a) Slump test
b) Vicat needle test
c) Le- Chatelier’s test
d) Briquette test
View Answer
Explanation: Tests of concrete are Workability, Direct tensile strength of concrete,
Bond b/w concrete and steel, compressive strength, dynamic modulus of elasticity etc.
6. Select the incorrect statement for the following.
Doubly reinforced beam is used in the following circumstances.
a) The external live loads may alternate
b) The loading may be eccentric
c) The members may be subjected to a shock
d) The members may need high compressive strength
View Answer
Explanation: e.g. A pile may be lifted in such a manner that the tension and compression zone may alternate.
7. After curing concrete for 28 days, how much strength will it attain?
a) 10-20%
b) 20-50%
c) 50-80%
d) 90-95%
View Answer
Explanation: Normally concrete is cured for 28 days to check its compressibility because it attains of about 90-95% of its strength in that period.
8. When was the ultimate load method of designing evolved?
a) 1940
b) 1950
c) 1960
d) 1970
View Answer
Explanation: The ultimate load method of designing was evolved in 1950 and became an alternative to WSM. It is also referred as load factor method.
9. Relative density of a compacted dense sand is approximately equal to _____
a) 0.4
b) 0.6
c) 0.95
d) 1.20
View Answer
Explanation: According to code of Indian Standards, the Relative density of compacted dense sand is about 0.95.
10. What are the basic components for the productions for the production of high strength aggregates?
a) Calcium Sulphate
b) Gypsum
c) Granite
d) Magnetite
View Answer
Explanation: Magnetite, Barites and scrap iron are commonly used for the production of heavy weight aggregates.
Sanfoundry Global Education & Learning Series – Design of RC Structures
To practice all areas of Design of RC Structures, here is complete set of 1000+ Multiple Choice Questions and Answers.
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