APSC AE CE Paper 1 Mock Test - 1 - Civil Engineering (CE) MCQ

HNO₃

Acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. These substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain

(C_c= D₃₀²/D₆₀×D₁₀)

For well-graded soil should be between 1 to 3.

I.e. (1≤C_c≤3)

The accuracy with which a plane table station can be located through three-point problem is known as its fix. The fix is good when instrument station T is within the triangle, and particularly when it is at the orthocentre and the middle station is much nearer than the other. On the other hand, the fix is bad or poor when the instrument station T is near the circumference of the circumscribing circle. So, the accuracy of the fix depends on the relative positions of the plotted points and that of the location of the plane table station. Thus the choice of plotted objects and location of the table should be made to get a strong fix.

As per IS 456 clause 23.2.1, the span to depth ratio for cantilever beam for span upto 10 m is 7.

σ1 = 200 and (σ1 - σ2) ÷ 2 = 50
σ1 - σ3 = 100
hence, = σ3 = 200 - 100 = 100 MPa

Thixotropy is the property of a soil due to which the loss in shear strength caused by remoulding can be regained with the time.

C_C=−0.0673(3.4)²

C_C=−0.77

Hence the option D is correct.

Hence the option C is correct.

Hence the correct answer is option C.

Hence the correct answer is option B.

Hence the correct answer is option D.

Hence the correct answer is option D.

NOMINAL size of MODULAR BRICK = 20 × 10 × 10 cm.

The polar distance 'it represents the horizontal thrust.

The links AC, CD, DE and EB will br under compression and there will be no bending moment. If an arch of this shape ACDEB is provided, there will be no bending moment.

Hence, the correct option is (D)

Hence, the correct option is (D)

Hence, the correct option is (C)

(a) NIL – When there is no perceptible deposit of efflorescence.

(b) SLIGHT- Not more than 10% area of the brick covered with a thin deposit of salt.

(c) MODERATE- Covering up to 50% area of the brick.

(d) HEAVY- Covering 50% or more but unaccompanied by powdering or flaking the brick surface.

(e) SERIOUS- When there is a heavy deposit of salts accompanied by powdering and flaking of the exposed surfaces.

• The error in measured length due to bad ranging is always positive as the measured value due to bad ranging is always greater than the actual value.
• As the error in measured length due to the careless holding of the chain is an accidental error and accidental errors as obvious compensating in nature.
• Correction for Pull (C_p):
• 

Where,

P = Pull applied during measurement

P_o = Standard Pull

L = length of the tape

E = Young’s modulus of elasticity

So, when P > P_o, the corrective will be positive, and the error will therefore be negative.

• If the chain used in measuring a distance is too short, the error will be positive, and correction will be negative and vice versa.

Moment of resistance factor is given by

Where,

c = permissible compressive bending stress in concrete (depends upon grade of concrete)

c = 5 N/mm² for M150 grade of concrete

j = liver arm depth factor =  1 - k/3

k = Neutral axis depth factor =  mc/(mc + t)

m = modular ratio =

σ_cbc = 5 N/mm²