As RSMSSB JE exam date 2021 is announced which is going to be held on 12th September 2021. As RSMSSB JE exam date 2021 is nearby so boost your preparation by attempt this Civil Engineering miscellaneous quiz for RSMSSB JE recruitment 2021.
Quiz: Civil Engineering
Each question carries 1 mark
Negative marking: 1/3 mark
Time: 8 Minutes
Q1. A soil has percentage air voids of the order of 30%. It has a porosity of 0.4 the air content of that soil shall be:
Q2. If a retention of 0.75 m is obtained from a tachometer on a vertical staff, then the horizontal distance between the tacheometer and staff station is?
(a) 75 m
(b) 25 m
(c) 7.5 m
(d) 50 m
Q3. The aggregate containing moisture in pores and having its surface dry is known as _______.
(a) Moist aggregates
(b) Very dry aggregates
(c) Dry aggregates
(d) Saturated surface dry aggregate
Q4. Which precipitation is caused by natural rising of warmer lighter air in colder and denser surroundings?
(a) Cyclonic precipitation
(b) Orographic precipitation
(c) Convective precipitation
(d) None of these
Q5. In a slab, the minimum reinforcement using steel of grade Fe 415 is:
(a) 0.12% of its gross sectional area
(b) 0.20% of its gross sectional area
(c) 0.15% of its gross sectional area
(d) 0.10% of its gross sectional area
Q6. What is the ratio of weight of rail in tonnes to the locomotive axle load in tonnes in India?
Sol. percentage air void (η_a ) = 30%
Porosity (n) = 0.4
Air content (a_c) = ?
η_a = na_c
0.30 = 0.4 × a_c
Sol. Staff intercept (s) = 0.75 meter
Multiplying constant (k) = 100
Additive constant (c) = 0
Sol. Depending upon the amount of moisture content in aggregates, it can exist in any of the 4 conditions.
● Very dry aggregate (having no moisture)
● Dry aggregate (contain some moisture in its pores)
● Saturated surface dry aggregate (pores completely filled with moisture but no moisture on surface)
● Moist or wet aggregates (pores are filled with moisture and also having moisture on surface)
Sol. Orographic precipitation → It is the result from lifting of warm moisture laden air masses due to topographic barriers like mountains.
Cyclonic precipitation → It is caused by lifting of air mass due to pressure difference.
Convective precipitation → It is caused by natural rising of warmer, lighter air in colder and denser surroundings.
Sol. In a slab, the minimum reinforcement using steel of grade HYSD bars (Fe 415) is 0.12% of its gross sectional area and for plain bars (Fe 250), the minimum reinforcement is 0.15% of its gross sectional area.
Sol. The ratio of weight of rail in tones to the locomotive axle load in tonnes is 1:510 in India.