# An aircraft is flying in level flight at a speed of 200 km/hr through air (density, p = 1.2 kg/m2, and viscosity m = 1.6x10-5 N-s/m2). The lift co-efficient at this speed is 0.4 and the drag co-efficient is 0.0065. The mass of the aircraft is 800 kg. The effective lift area of the aircraft is

1.  21.2 m2

2.  10.6 m2

3.  2.2 m2

4.  1.1 m2

4

1.1 m2

Explanation :
No Explanation available for this question

# A frictionless fluid of density r flow through a bent pipe as shown below. If A is the cross sectional area and V is the velocity of flow, the forces exerted on segment 1-2 of the pipe in the x and y directions are, respectively

1.  ρAV2;0

2.  rAV2;√2 ρAV2

3.  0;0

4.  0; (1/2) ρAV2

4

0;0

Explanation :
No Explanation available for this question

# Some of the structural strength of a clayey material that is lost by remoulding is slowly recovered with time.  This property of soils to undergo an isothermal gel-to sol-to-get transformation upon agitation and subsequent rest is termed

1.  Isotropy

2.  Anisotropy

3.  Thixotropy

4.  Allotropy

4

Thixotropy

Explanation :
No Explanation available for this question

# If soil is dried beyond its shrinkage limit, it will show

1.  Large volume change

2.  Moderate volume change

3.  Low volume change

4.  No volume change

4

No volume change

Explanation :
No Explanation available for this question

# The stress-strain behaviour of soils as shown in the Figure correspondence to

1.  Curve 1 : Loose sand and normally consolidated clay Curve 2 : Loose sand and over consolidated clay

2.  Curve 1 : Dense sand and normally consolidated clay Curve 2 : Loose sand and over consolidated clay

3.  Curve 1 : Dense sand and over consolidated clay Curve 2 : Loose sand and normally consolidated clay

4.  Curve 1 : Loose sand and over consolidated clay Curve 2 : Dense sand normally consolidated clay

4

Curve 1 : Dense sand and over consolidated clay

Curve 2 : Loose sand and normally consolidated clay

Explanation :
No Explanation available for this question

# In cohesive soils he depth of tension crack (Zcr) is likely to be

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# The settlement of prototype in granular material may be estimated using plate load test data from the following expression

1.  Sprototype = Splate x (B prototype/Bplate)

2.  Sprototype = Splate x (B plate /B prototype)

3.  Sprototype = Splate x [2B prototype/ (B prototype + Bplate)]2

4.  Sprototype = Splate x [(B prototype + Bplate)/2B prototype]2

4

Sprototype = Splate x (B prototype/Bplate)

Explanation :
No Explanation available for this question

# In which one of the following arrangement would the vertical force on the cylinder due to water be the Maximum

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# At the same mean velocity, the ratio of head loss per unit length for a sewer pipe flowing full to that for the same pipe flowing half full would be

1.  2.0

2.  1.63

3.  1.00

4.  0.61

4

1.00

Explanation :
No Explanation available for this question

# Three reservoirs A, B and C are interconnected by pipes as shown in the Figure. Water surface elevations in the reservoirs and the Pirzometric head at the junction J are indicated in the Figure. Discharge Q1, Q2 and Q3 are related as

1.  Q1+Q2 = Q3

2.  Q1= Q2+Q3

3.  Q2=Q1+Q3

4.  Q1+Q2+Q3 = 0

4

Q1= Q2+Q3

Explanation :
No Explanation available for this question

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