| 1. | An aggregate which may contain some moisture in the pores but having dry surface is known as ? | |
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very dry aggregate
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dry aggregate
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saturated surface dry aggregate
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moist aggregate
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Report Question| 2. | In the manufacture of cement, the dry or wet mixture of calcareous and argillaceous materials burnt in a ? | |
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country kiln
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continuous flare kiln
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rotary kiln
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all of these
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| 3. | The tricalcium aluminate in cement has the property of ? | |
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reacting fast with water
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causing initial setting of cement
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generating large amount of heat hydration
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all of these
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| 4. | The concrete in which preliminary tests are performed for designing the mix is called ? | |
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rich concrete
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controlled concrete
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lean concrete
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ordinary concrete
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| 5. | For high degree of workability, the compaction factor is ? | |
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0.65
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0.75
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0.85
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0.95
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| 6. | During field test, the cement is said to be pure and of good quality when ? | |
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the colour of cement is uniformly greenish grey
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a handful of cement, thrown into a bucket of water, floats
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hand is thrusted into a bag of cement, it feels cool
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all of the above
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| 7. | The fineness modulus of an aggregate is roughly proportional to ? | |
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specific gravity of the aggregate
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shape of the aggregate
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average size of particles in the aggregate
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grading of the aggregate
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| 8. | The maximum particle size of fine aggregate is ? | |
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2.5 mm
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4.75 mm
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5.85 mm
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6.5 mm
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| 9. | The levelling operation that removes humps and hollows and give a true, uniform concrete surface is called ? | |
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screeding
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floating
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trowelling
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compacting
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| 10. | Which of the following statement is correct ? | |
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The maximum size of coarse aggregate should not exceed one-fourth of the minimum dimension of the plain concrete member
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The maximum size of coarse aggregate should not exceed one-fifth of the minimum dimension of the reinforced concrete member
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The aggregates of 40 mm, 20 mm and 10 mm sizes are commonly used for concrete works
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all of the above
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