1888 + Mcqs in Upsc Civil Service Exam Questions Page 12 McqOptions

551.	Among the following, which is/are not pre-treatment unit (s) ?
A.	Bar screen and grit chamber
B.	Flow equalization and proportioning tank
C.	Neutralization for pH adjustment tank
D.	Nutrient removal tank
Answer» B. Flow equalization and proportioning tank

Discussion

552.	When the recirculation ratio in a high rate trickling filter is unity, then what is the value of the recirculation factor ?
A.	1
B.	> 1
C.	< 1
D.	Zero
Answer» C. < 1

Discussion

553.	Consider the following statements in regard to aerobic and anaerobic treatment processes :1. Biomass production in the aerobic treatment process is more as compared to the anaerobic treatment process.2. Start-up period is more in the aerobic treatment process as compared to the anaerobic treatment process.3. Energy consumption and production is more in the aerobic treatment process as compared to the anaerobic treatment process.Which of the statements given above is/are correct ?
A.	1 and 2
B.	2 and 3
C.	only 2
D.	only 1
Answer» E.

Discussion

554.	Which is the major pollutant present in photochemical smog ?
A.	PAN
B.	S02
C.	HC
D.	N02
Answer» B. S02

Discussion

555.	In which one of the following zones is a logarithmic spiral shape of failure surface assumed in the case of bearing capacity analysis of C-φ soils ?
A.	Active zone
B.	Passive zone
C.	Radial shear'zone
D.	Surcharge zone
Answer» D. Surcharge zone

Discussion

556.	While driving a large number of piles in loose sand :
A.	It is advantageous to follow a sequence of pile driving such that the inner piles are driven first and then proceed outwards
B.	It is advantageous to follow a sequence of pile driving such that the piles near the periphery are driven first and inner piles are driven later
C.	It is advantageous to follow a sequence of pile driving such that alternately inner and outer piles are driven
D.	Driving of piles can be done in any random order
Answer» B. It is advantageous to follow a sequence of pile driving such that the piles near the periphery are driven first and inner piles are driven later

Discussion

557.	In a laminar boundary layer, the velocity distribution can be assumed to be given, in usual notations, asWhich one of the following is the correct expression for the displacement thickness δ* for this boundary layer ?
A.	δ* = δ
B.	δ* = δ/2
C.	δ* = δ/4
D.	δ* = δ/6
Answer» C. δ* = δ/4

Discussion

558.	For which one of the following purposes is the double mass curve used ?
A.	Checking on the consistency of precipitation records
B.	Prediction of annual precipitation
C.	Defining which periods of storm should be analyzed to obtain the maximum useful information from storm rainfall records
D.	For estimating the capacity of a reservoir.
Answer» B. Prediction of annual precipitation

Discussion

559.	The percentage of time in a year during which the cross wind component remains within the limit, is :
A.	Wind coverage
B.	Headwind
C.	Prevailing wind
D.	Cross wind
Answer» B. Headwind

Discussion

560.	At a certain station, the mean of the average temperature is 25°C and mean of the maximum daily temperature is 40°C. What is the airport reference temperature (ART) ?
A.	46.6°C
B.	45°C
C.	35°C
D.	30°C
Answer» E.

Discussion

561.	Consider the following statements :1. Dock is a marine structure for mooring up vessels, loading and unloading of passengers and/or cargo.2. Dry dock is generally used only for carrying out repairs, inspections and painting.3. Wet dock is an enclosed or partially enclosed basin provided with locks and entrance gate to keep the water level at a fairly constant level.Which of the statements given above are correct ?
A.	1, 2 and 3
B.	2 and 3
C.	1 and 2
D.	1 and 3
Answer» B. 2 and 3

Discussion

562.	What is the curve resistance for a 50 tonnes train on a BG track on a 4° curve?
A.	0.05 tonne
B.	0.06 tonne
C.	0.08 tonne
D.	0.01 tonne
Answer» D. 0.01 tonne

Discussion

563.	Which one of the following gives the number of gate position in an airport ?
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» B. [B].

Discussion

564.	If Δ p is increment ofpressure on a normally consolidated saturated soil mass, as per Terzaghi's theory at the instant of application of pressure increment i.e. when time t = 0, what is the pore pressure developed in the soil mass ?
A.	Zero
B.	Very much less than Δ p
C.	Equal to Δ p
D.	Greater than Δ p
Answer» D. Greater than Δ p

Discussion

565.	A catchment has an area of 150 hectares and a run-off/rainfall ratio of 0.40. If due to 10 cm rainfall over the catchment, a stream flow at the catchment outlet lasts for 10 hours, what is the average stream flow in the period ?
A.	60, 000 m3/hour
B.	100 m3/minute
C.	3.5 m3/s
D.	1.33 m3/s
Answer» C. 3.5 m3/s

Discussion

566.	A 6 hour storm has 6 cm of rainfall and the resulting runoff was 3 cm. If φ = index remains at the same value, which one of the following is the runoff due to 12 cm of rainfall in 9 hours in the catchment?
A.	4.5 cm
B.	6.0 cm
C.	7.5 cm
D.	9.0 cm
Answer» D. 9.0 cm

Discussion

567.	Which one of the following is the correct expression for the versine (h) of a curve ?(Where l = length of rail on the curve portion and r = radius of curvature)
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» D. [D].

Discussion

568.	A summit curve is formed at the intersection of a 3% upgrade and a 5% downgrade. What is the length of the summit curve in order to provide a stopping distance of 128 m ?
A.	271m
B.	298 m
C.	322 m
D.	340 m
Answer» C. 322 m

Discussion

569.	Consider the following statements :1. A recovery ratio of less than 1 implies that the soil has compressed.2. A recovery ratio greater than 1 implies that the soil has swelled.3. A recovery ratio of less than 1 implies that the soil has swelled.4. A recovery ratio greater than 1 implies that the soil has compressed.Which of the following statements given above is/are correct ?
A.	1 and 2
B.	1 only
C.	3 and 4
D.	4 only
Answer» B. 1 only

Discussion

570.	Which one of the following states of field compaction of sand deposit truly represents the corrected standard penetration test value : N (corrected) = 27 ?
A.	Loose
B.	Medium dense
C.	Dense
D.	Very dense
Answer» C. Dense

Discussion

571.	Consider the following statements about provision of sag rods :1. Sag rods reduce span length of purlin in the weak direction.2. Sag rods are installed in the plane of the roof.3. Ridge purlin is subject to vertical components of sag rods on either side of slope.Which of the statements given above are correct ?
A.	1, 2 and 3
B.	2 and 3
C.	1 and 2
D.	1 and 3
Answer» B. 2 and 3

Discussion

572.	For an activity 201-207 in an AOA network, the EET values, LET values and activity duration are shown in the figure. Between free float, interference float and independent float, which one of the following is the correct sequence in the decreasing magnitude order ?
A.	Free float - Interference float - Independent float
B.	Free float - Independent float - Interference float
C.	Interference float - Free float - Independent float
D.	Interference float - Independent float - Free float
Answer» D. Interference float - Independent float - Free float

Discussion

573.	A beam of rectangular section having simply supported span L, is subject to a concentrated load at its mid-span. What is the length of elasto-plastic zone of the plastic hinge ?
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» B. [B].

Discussion

574.	Which one of the following correctly expresses the split tensile strength of a circular cylinder of length L and diameter D, subject to a maximum load of P ?
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» D. [D].

Discussion

575.	What should be the minimum grade of reinforced concrete in and around sea coast construction?
A.	M 35
B.	M 30
C.	M 25
D.	M 20
Answer» C. M 25

Discussion

576.	Which of the following are the additional moments considered for design of slender compression member in lieu of deflectiion x and y directions ?(Where Pu is axial load; lex and ley are effective lengths in respective directions; D depth of section ⊥ to major axis; b width of the member)
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» D. [D].

Discussion

577.	A beam of rectangular cross-section (b x d) is subjected to a torque T. What is the maximum torsional stress induced in the beam ?(Where b < d, and α is a constant)
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» B. [B].

Discussion

578.	Why is super plasticizer added to concrete?1. To reduce the quantity of mixing water.2. To increase the consistency.3. To reduce the quantity of cement.4. To increase resistance to freezing and thawing.Select the correct answer using the code given below :
A.	1, 2 and 3
B.	1, 3 and 4
C.	2 and 3
D.	4 only
Answer» B. 1, 3 and 4

Discussion

579.	For the propped cantilever beam shown in the figure given above, the plastic moment capacity is Mp. What is the value of its collapse load ?
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» C. [C].

Discussion

580.	The figure shows a rigid frame fixed at A and hinged at C.If a pure moment of 20 kNm is applied at B in the plane of the figure, then what is the moment at the fixed end A?
A.	10 kNm
B.	7.5 kNm
C.	5 kNm
D.	2.5 kNm
Answer» D. 2.5 kNm

Discussion

581.	Which one of the following is correct in respect of the influence line for the bending moment at one-fourths of the span from left support of a prismatic beam simply supported at ends ?
A.	It is composed of straight lines only
B.	It is composed of curved lines only
C.	It is composed of straight and curved line
D.	It is parabolic
Answer» B. It is composed of curved lines only

Discussion

582.	What is the ratio of the forces in the members AB, BE and AE of the pin-joined truss shown in the figure?
A.	5 : 4 : 3
B.	4 : 3 : 5
C.	[C].
D.	None of the above
Answer» C. [C].

Discussion

583.	What is the vertical displacement at the point C of the structure shown in the figure ?
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» B. [B].

Discussion

584.	Couple M is applied at C on a simply supported beam AB. What is the maximum shear force for the beam ?
A.	Zero
B.	M
C.	2 M/3
D.	M/3
Answer» E.

Discussion

585.	For the simply supported beam shown in the given figure, at what distance from the support A, is the shear force zero?
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» E.

Discussion

586.	A mild steel bar of square cross-section 40 mm x 40 mm is 400 mm long. It is subjected to a longitudinal tensile stress of 440 N/mm2 and lateral compressive stress is 200 N/mm2 in perpendicular directions. E = 2 x 10-5 N/mm2, μ = 0.3. What is the approximate elongation of tht bar in the longitudinal direction ?
A.	0.44 mm
B.	088 mm
C.	0.22 mm
D.	1 mm
Answer» E.

Discussion

587.	At a certain point in a strained material, there are two mutually perpendicular stresses σx = 100 N/mm2 (Tensile) and σx = 50 N/mm2 (Compressive). [Notations : Tension (+); Compression (-) ]What are the values of the principal stresses in N/mm2 at that point ?
A.	100, -50
B.	-100, 50
C.	75, -25
D.	-75, 25
Answer» B. -100, 50

Discussion

588.	For a state of plane stress σ1 = σx = 40 MPa, and σ2 = σy = 20MPa. What are the values of the maximum in-plane shearing stress and absolute maximum shearing stress ?
A.	(± 10, 20) MPa
B.	(± 10, 10) MPa
C.	(± 20, 10) MPa
D.	(± 20, 20) MPa
Answer» B. (± 10, 10) MPa

Discussion

589.	What is the ratio of maximum shear stress to average shear stress for a circular section ?
A.	2
B.	[B].
C.	[C].
D.	[D].
Answer» D. [D].

Discussion

590.	If the Young's modulus 'E' is equal to bulk modulus 'K', then what is the value of the Posson's ratio ?
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» D. [D].

Discussion

591.	A cantilever has rectangular cross-section and supports concentrated load at its free end initially. If depth and width of the beam sections are doubled, the deflection, at free end of the cantilever will reduce to what percentage of the initial deflection ?
A.	20%
B.	15.72%
C.	9.37%
D.	6.25%
Answer» D. 6.25%

Discussion

592.	A pipe line, 2000 m long, carries water. Velocity of propagation of pressure wave is 1000 m/s. If the valve at the low stream end is instantaneously closed at time, t = 0, negative water hammer pressure at the valve will last for
A.	0 - 4 S
B.	2 - 4 S
C.	4 - 8 S
D.	S - 12 S
Answer» C. 4 - 8 S

Discussion

593.	A sewer, 1000 mm in diameter is laid at a slope to obtain a velocity of 0.8 m/s when running full. Assuming Manning's n as constant, what is the velocity in this sewer if it is running half full.
A.	0.2 m/s
B.	0.4 m/s
C.	0.6 m/s
D.	0.8 m/s
Answer» E.

Discussion

594.	Consider the following statements with reference to oxidation ponds :1. They require high initial investments2. They have low operational cost3. They are also called stabilization ponds.Which of the statements given above are correct ?
A.	1 and 2
B.	2 and 3
C.	1 and 3
D.	1, 2 and 3
Answer» C. 1 and 3

Discussion

595.	Consider the following statements :Total flat is :1. the time span by which the starting (or finishing) of an activity can be delayed without delaying the completion of the project.2. difference between maximum time available and the actual time required to perform the activity.3. difference between its earliest finish time and the earliest start time of its successor activity.Which among the following is/are correct ?
A.	2 and 3
B.	1, 2 and 3
C.	1 only
D.	1 and 2
Answer» C. 1 only

Discussion

596.	A horizontal fixed beam is fixed at both it ends A and B. During loading, the right support sinks by an amount δ. Flexural rigidity of the beam is uniform and is equal to EI. Length of the beam is L. What is the moment developed at the centre of the beam due to sinking of the support ?
A.	6 EI δ/L2
B.	zero
C.	3 EI δ/L2
D.	12 EI δ/L2
Answer» C. 3 EI δ/L2

Discussion

597.	A three-hinged circular arch ACB is formed by two quadrants of circles AC and BC of radii 2R and R respectively with C as crown, as shown in the figure at side. Consider the following in respect of the reactive forces developed at support A and B due to concentrated load W at the Crown. 1. Line of action RA at A is inclined as 45° to the horizontal. 2. VA = VB = W/2 3. HB = 2 HA 4. HA = HB = W/2 Which of the above is/are correct ?
A.	1 and 3
B.	2 and 3
C.	1, 2 and 4
D.	4 only
Answer» B. 2 and 3

Discussion

598.	What are the distribution factors at joint B for the members BA and BC respectively, in the figure at side ?
A.	0.57 and 0.43
B.	0.43 and 0.57
C.	0.50 and 0.50
D.	0.36 and 0.64
Answer» D. 0.36 and 0.64

Discussion

599.	A ladder AB of weight W and length l is held in equilibrium by a horizontal force P as shown in the figure given above. Assuming the ladder to be idealized as a homogeneous rigid bar and the surfaces to be smooth, which one of the following is correct ?
A.	[A].
B.	[B].
C.	[C].
D.	P = 2 W cos θ
Answer» B. [B].

Discussion

600.	Wearing locations of rails and their reasons are listed below :1. Wear at end of rails : Loose fish bolts2. Wear at sides of rail head : Constant lerake application3. Wear on the top of rail head on tangent truck : Rigidity of wheel base4. Wear on top of rail head on curves : Lesser area of contact between wheel and rail Which of the pairs given above are correctly matched ?
A.	1 and 4
B.	1 and 2
C.	2 and 3
D.	1, 2, 3 and 4
Answer» E.

Discussion

Explore topic-wise MCQs in Civil Engineering.

Among the following, which is/are not pre-treatment unit (s) ?

When the recirculation ratio in a high rate trickling filter is unity, then what is the value of the recirculation factor ?

Which is the major pollutant present in photochemical smog ?

In which one of the following zones is a logarithmic spiral shape of failure surface assumed in the case of bearing capacity analysis of C-φ soils ?

While driving a large number of piles in loose sand :

In a laminar boundary layer, the velocity distribution can be assumed to be given, in usual notations, asWhich one of the following is the correct expression for the displacement thickness δ* for this boundary layer ?

For which one of the following purposes is the double mass curve used ?

The percentage of time in a year during which the cross wind component remains within the limit, is :

At a certain station, the mean of the average temperature is 25°C and mean of the maximum daily temperature is 40°C. What is the airport reference temperature (ART) ?

What is the curve resistance for a 50 tonnes train on a BG track on a 4° curve?

Which one of the following gives the number of gate position in an airport ?

If Δ p is increment ofpressure on a normally consolidated saturated soil mass, as per Terzaghi's theory at the instant of application of pressure increment i.e. when time t = 0, what is the pore pressure developed in the soil mass ?

A catchment has an area of 150 hectares and a run-off/rainfall ratio of 0.40. If due to 10 cm rainfall over the catchment, a stream flow at the catchment outlet lasts for 10 hours, what is the average stream flow in the period ?

A 6 hour storm has 6 cm of rainfall and the resulting runoff was 3 cm. If φ = index remains at the same value, which one of the following is the runoff due to 12 cm of rainfall in 9 hours in the catchment?

Which one of the following is the correct expression for the versine (h) of a curve ?(Where l = length of rail on the curve portion and r = radius of curvature)

A summit curve is formed at the intersection of a 3% upgrade and a 5% downgrade. What is the length of the summit curve in order to provide a stopping distance of 128 m ?

Which one of the following states of field compaction of sand deposit truly represents the corrected standard penetration test value : N (corrected) = 27 ?

For an activity 201-207 in an AOA network, the EET values, LET values and activity duration are shown in the figure. Between free float, interference float and independent float, which one of the following is the correct sequence in the decreasing magnitude order ?

A beam of rectangular section having simply supported span L, is subject to a concentrated load at its mid-span. What is the length of elasto-plastic zone of the plastic hinge ?

Which one of the following correctly expresses the split tensile strength of a circular cylinder of length L and diameter D, subject to a maximum load of P ?

What should be the minimum grade of reinforced concrete in and around sea coast construction?

Which of the following are the additional moments considered for design of slender compression member in lieu of deflectiion x and y directions ?(Where Pu is axial load; lex and ley are effective lengths in respective directions; D depth of section ⊥ to major axis; b width of the member)

A beam of rectangular cross-section (b x d) is subjected to a torque T. What is the maximum torsional stress induced in the beam ?(Where b < d, and α is a constant)

Why is super plasticizer added to concrete?1. To reduce the quantity of mixing water.2. To increase the consistency.3. To reduce the quantity of cement.4. To increase resistance to freezing and thawing.Select the correct answer using the code given below :

For the propped cantilever beam shown in the figure given above, the plastic moment capacity is Mp. What is the value of its collapse load ?

The figure shows a rigid frame fixed at A and hinged at C.If a pure moment of 20 kNm is applied at B in the plane of the figure, then what is the moment at the fixed end A?

Which one of the following is correct in respect of the influence line for the bending moment at one-fourths of the span from left support of a prismatic beam simply supported at ends ?

What is the ratio of the forces in the members AB, BE and AE of the pin-joined truss shown in the figure?

What is the vertical displacement at the point C of the structure shown in the figure ?

Couple M is applied at C on a simply supported beam AB. What is the maximum shear force for the beam ?

For the simply supported beam shown in the given figure, at what distance from the support A, is the shear force zero?

At a certain point in a strained material, there are two mutually perpendicular stresses σx = 100 N/mm2 (Tensile) and σx = 50 N/mm2 (Compressive). [Notations : Tension (+); Compression (-) ]What are the values of the principal stresses in N/mm2 at that point ?

For a state of plane stress σ1 = σx = 40 MPa, and σ2 = σy = 20MPa. What are the values of the maximum in-plane shearing stress and absolute maximum shearing stress ?

What is the ratio of maximum shear stress to average shear stress for a circular section ?

If the Young's modulus 'E' is equal to bulk modulus 'K', then what is the value of the Posson's ratio ?

A cantilever has rectangular cross-section and supports concentrated load at its free end initially. If depth and width of the beam sections are doubled, the deflection, at free end of the cantilever will reduce to what percentage of the initial deflection ?

A pipe line, 2000 m long, carries water. Velocity of propagation of pressure wave is 1000 m/s. If the valve at the low stream end is instantaneously closed at time, t = 0, negative water hammer pressure at the valve will last for

A sewer, 1000 mm in diameter is laid at a slope to obtain a velocity of 0.8 m/s when running full. Assuming Manning's n as constant, what is the velocity in this sewer if it is running half full.

Consider the following statements with reference to oxidation ponds :1. They require high initial investments2. They have low operational cost3. They are also called stabilization ponds.Which of the statements given above are correct ?

A horizontal fixed beam is fixed at both it ends A and B. During loading, the right support sinks by an amount δ. Flexural rigidity of the beam is uniform and is equal to EI. Length of the beam is L. What is the moment developed at the centre of the beam due to sinking of the support ?

What are the distribution factors at joint B for the members BA and BC respectively, in the figure at side ?

A ladder AB of weight W and length l is held in equilibrium by a horizontal force P as shown in the figure given above. Assuming the ladder to be idealized as a homogeneous rigid bar and the surfaces to be smooth, which one of the following is correct ?