WorksheetsD68 FACE THE CHALLENGE
Total questions: 31
Worksheet time: 31mins
Name
Class
Date
1.
If the head of water is 30 m and the efficiency of the turbine is 85%, what is the output power for a discharge of 5 m³/s? (Take g = 9.81 m/s²)
a)
1.25 MW
b)
1.15 MW
c)
1.35 MW
d)
1.05 MW
2.
Assertion (A): Pelton wheel is suitable for low head and high discharge. Reason (R): It operates on the principle of impulse of water.
a)
A is true, R is true and R is the correct explanation of A
b)
A is true, R is true but R is not the correct explanation of A
c)
A is true, R is false
d)
A is false, R is true
3.
In hydroelectric projects, surge tanks are provided to:
a)
Prevent water hammer
b)
Increase efficiency
c)
Store water
d)
Control silt entry
4.
Which type of dam is most suitable for narrow valleys?
a)
Arch dam
b)
Gravity dam
c)
Embankment dam
d)
Buttress dam
5.
The standard penetration test (SPT) is used to determine:
a)
Bearing capacity of soil
b)
Water content
c)
Permeability
d)
Shrinkage limit
6.
In RCC, minimum grade of concrete for severe exposure condition is:
a)
M20
b)
M25
c)
M30
d)
M35
7.
The primary function of a draft tube in a reaction turbine is to:
a)
Recover kinetic energy
b)
Increase head
c)
Reduce cavitation
d)
All of the above
8.
In surveying, the method suitable for locating inaccessible points is:
a)
Resection
b)
Radiation
c)
Traversing
d)
Intersection
9.
In RCC beams, side face reinforcement is provided when depth exceeds:
a)
800 mm
b)
750 mm
c)
1000 mm
d)
1200 mm
10.
The most efficient cross-section for a channel is one which:
a)
Has least wetted perimeter
b)
Has maximum wetted perimeter
c)
Has rectangular shape
d)
Has trapezoidal shape
11.
Which turbine is suitable for low head and large discharge?
a)
Kaplan turbine
b)
Pelton wheel
c)
Francis turbine
d)
Impulse turbine
12.
In brick masonry, frog is provided to:
a)
Improve appearance
b)
Reduce weight
c)
Form key of mortar
d)
Drain water
13.
In RCC column design, minimum eccentricity is taken as:
a)
L/500 + D/30
b)
L/300 + D/30
c)
L/500 + D/20
d)
L/300 + D/20
14.
In concrete mix design, the water-cement ratio affects:
a)
Strength only
b)
Workability only
c)
Strength and durability
d)
None
15.
The device used to measure discharge in open channels using a contraction is:
a)
Venturiflume
b)
Weir
c)
Orifice
d)
Pitot tube
16.
In AutoCAD, the function key to toggle Ortho mode is:
a)
F7
b)
F8
c)
F9
d)
F10
17.
In a hydroelectric project, the structure used to divert water to the turbines is called:
a)
Spillway
b)
Forebay
c)
Penstock
d)
Surge tank
18.
In AutoCAD, the shortcut key to repeat the last command is:
a)
Ctrl + Z
b)
Enter
c)
Esc
d)
Ctrl + Y
19.
The instrument used for determining the consistency of freshly mixed concrete is:
a)
Vicat apparatus
b)
Slump cone
c)
Compaction factor apparatus
d)
Flow table
20.
In building construction, the process of covering external walls with a thin coat of cement mortar is:
a)
Pointing
b)
Plastering
c)
Rendering
d)
Finishing
21.
In surveying, the line joining points of equal elevation is called:
a)
Level line
b)
Contour line
c)
Grade line
d)
Datum line
22.
In RCC, the limiting value of the neutral axis depth for Fe500 steel (IS 456) is:
a)
0.46d
b)
0.48d
c)
0.53d
d)
0.55d
23.
Assertion (A): Surge tanks are provided in hydroelectric projects.
Reason (R): They absorb sudden changes in water pressure in penstocks.
a)
Both A and R are true, R is the correct explanation of A
b)
Both A and R are true, R is not the correct explanation of A
c)
A is true, R is false
d)
A is false, R is true
24.
The main purpose of reinforcement in RCC is to:
a)
Resist tensile stresses
b)
Resist compressive stresses
c)
Increase weight
d)
Reduce shrinkage
25.
In AutoCAD, the command used to create a circle by specifying two points on its diameter is:
a)
CIRCLE
b)
2P
c)
3P
d)
DIAMETER
26.
In concrete technology, the initial setting time of OPC should not be less than:
a)
15 minutes
b)
30 minutes
c)
45 minutes
d)
60 minutes
27.
The type of dam constructed with earth materials and relying on its weight for stability is:
a)
Gravity dam
b)
Earthen dam
c)
Arch dam
d)
Buttress dam
28.
In RCC, the minimum cover to reinforcement for footing as per IS 456 is:
a)
25 mm
b)
40 mm
c)
50 mm
d)
75 mm
29.
In surveying, which method is used to determine the difference in elevation between two points using a level?
a)
Direct levelling
b)
Reciprocal levelling
c)
Trigonometric levelling
d)
Barometric levelling
30.
The most common aggregate size used in RCC work is:
a)
10 mm
b)
20 mm
c)
25 mm
d)
40 mm
31.
In AutoCAD, the command used to copy properties from one object to another is:
a)
MATCHPROP
b)
COPY
c)
PASTE
d)
PROPERTIES
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