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WorksheetsD59 MASTER THE DAY
Total questions: 101
Worksheet time: 2hrs 41mins
Name
Class
Date
1.
Which joint uses a collar filled with 1:1 cement mortar to connect plain-ended RCC pipes?
a)
Flanged joint
b)
Collar joint
c)
Screwed joint
d)
Simplex joint
2.
What is the purpose of a flanged joint in pipelines?
a)
Permanent connection
b)
Used in curved areas
c)
For high pressure and detachable connection
d)
Used only in water supply
3.
What material is used in the collar joint for sealing?
a)
Bitumen
b)
Lime mortar
c)
Cement mortar (1:1)
d)
Asphalt
4.
Which joint consists of two flanges joined by bolts with a rubber gasket in between?
a)
Spigot and socket joint
b)
Flanged joint
c)
Expansion joint
d)
Simplex joint
5.
Which pipe joint is best suited where pipe vibrations are expected?
a)
Simplex joint
b)
Flanged joint
c)
Dresser coupling
d)
Socket joint
6.
Assertion: Dresser coupling is used where pipe vibration is expected. Reason: It includes middle rings, gaskets, and followers to provide flexibility.
a)
Both A and R are true and R is the correct explanation
b)
Both A and R are true but R is not the correct explanation
c)
A is true but R is false
d)
A is false but R is true
7.
Which joint is commonly used in CI pipes with threaded ends?
a)
Simplex joint
b)
Screwed joint
c)
Dresser coupling
d)
Collar joint
8.
Which type of pipe joint is most flexible and allows slight movement?
a)
Socket joint
b)
Collar joint
c)
Simplex joint
d)
Expansion joint
9.
Which of the following joints is preferred in temporary water supply pipe lines?
a)
Simplex joint
b)
Flanged joint
c)
Collar joint
d)
Socket joint
10.
Which component of dresser coupling applies pressure to the gasket?
a)
Middle ring
b)
Rubber sleeve
c)
Follower ring
d)
Packing plate
11.
Which joint is suitable for pipes laid at a gradient in hilly areas?
a)
Expansion joint
b)
Socket and spigot joint
c)
Dresser coupling
d)
Screwed joint
12.
The function of rubber gasket in flanged joint is to:
a)
Hold the pipes together
b)
Provide a watertight seal
c)
Support the pipe weight
d)
Reduce pressure loss
13.
What is the main advantage of using a flanged joint?
a)
Used in underground works
b)
Easily dismantled for repair
c)
Cheaper than others
d)
Suitable for plastic pipes only
14.
Which pipe joint does not require special tools or threading?
a)
Screwed joint
b)
Simplex joint
c)
Flanged joint
d)
Dresser coupling
15.
Which type of joint accommodates expansion and contraction in pipelines?
a)
Expansion joint
b)
Simplex joint
c)
Socket joint
d)
Collar joint
16.
In flanged joint, bolts are tightened in:
a)
Straight sequence
b)
Criss-cross pattern
c)
Random order
d)
Clockwise only
17.
Why is 1:1 cement mortar used in collar joints?
a)
Improves flexibility
b)
Ensures watertight seal
c)
Reduces cost
d)
Fills large gaps
18.
Which joint is preferred in cast iron pipes with threading at ends?
a)
Screwed joint
b)
Spigot joint
c)
Expansion joint
d)
Dresser coupling
19.
Which test is used to check the water-tightness of newly laid sewers?
a)
Mirror test
b)
Smoke test
c)
Water test
d)
Pressure test
20.
Which joint is made using a rubber gasket and is commonly used in water supply pipes?
a)
Socket joint
b)
Bell and spigot joint
c)
Dresser coupling
d)
Expansion joint
21.
What is the purpose of providing invert blocks in manholes?
a)
Prevent entry of rodents
b)
Avoid blockage
c)
Maintain sewer flow direction
d)
Support the manhole cover
22.
Statement: The collar joint is suitable for unpressurised sewer pipes. Choose the correct option.
a)
True
b)
False
c)
Only for metal pipes
d)
Used in high-pressure lines
23.
Assertion (A): Dresser coupling can connect pipes with slightly different diameters. Reason (R): It uses flexible rubber gaskets.
a)
Both A and R are true, and R explains A
b)
Both A and R are true, but R doesn’t explain A
c)
A is true, R is false
d)
A is false, R is true
24.
Which trap is used to intercept solid waste before it enters the public sewer?
a)
Floor trap
b)
Gully trap
c)
Intercepting trap
d)
Bottle trap
25.
Which material is commonly used as the bedding for sewer pipes?
a)
Lime mortar
b)
Granite chips
c)
Sand
d)
Cement concrete
26.
Which of the following is NOT a method of pipe jointing?
a)
Socket joint
b)
Collar joint
c)
Bell and spigot joint
d)
Hook joint
27.
During air testing of a sewer line, the fall in pressure is checked using:
a)
Manometer
b)
Vent pipe
c)
Gauge tap
d)
Stop cock
28.
Which pipe joint allows expansion and contraction of pipe due to temperature variations?
a)
Socket joint
b)
Flanged joint
c)
Expansion joint
d)
Collar joint
29.
Which trap is preferred under urinals for foul smell prevention?
a)
Q trap
b)
Floor trap
c)
P trap
d)
Intercepting trap
30.
In a sewer system, what is the purpose of manhole cover?
a)
Prevent unauthorized access
b)
Allow gases to escape
c)
Maintain pressure
d)
Serve as ventilation shaft
31.
Which component supports the alignment of sewer pipe at trench corners?
a)
Pipe bed
b)
Timber block
c)
Sight rail
d)
Boning rod
32.
Which test uses visible vapors to check leaks in household drainage?
a)
Air test
b)
Water test
c)
Smoke test
d)
Soap test
33.
Which fitting is used to connect two different diameter pipes?
a)
Reducer
b)
Elbow
c)
Tee
d)
Socket
34.
Which layer supports and distributes the load from sewer pipe to soil?
a)
Backfill
b)
Pipe bedding
c)
Trench bottom
d)
Side packing
35.
Which of the following is a feature of socket and spigot joint?
a)
Used for high pressure
b)
Requires welding
c)
Uses rubber ring or lead caulking
d)
Used in electrical conduit
36.
Which joint is best suited for high-pressure pipe lines?
a)
Socket joint
b)
Flanged joint
c)
Expansion joint
d)
Collar joint
37.
Which test checks joint tightness by filling sewer with water and observing water level?
a)
Smoke test
b)
Mirror test
c)
Water test
d)
Ball test
38.
What is the function of a vent pipe in drainage systems?
a)
Collect rainwater
b)
Prevent air locks and remove foul gases
c)
Improve flow rate
d)
Store overflow water
39.
Which test uses smoke to detect leaks in drainage systems?
a)
Air test
b)
Smoke test
c)
Mirror test
d)
Hydrostatic test
40.
Which trap is used at the last manhole of a house drainage system?
a)
Intercepting trap
b)
Floor trap
c)
P trap
d)
Nahani trap
41.
Which method is used to maintain alignment and slope during sewer pipe laying?
a)
Plumb bob
b)
Sight rails and boning rods
c)
Spirit level
d)
Auto level
42.
Which ratio of cement mortar is used for packing collar joints?
a)
1:2
b)
1:3
c)
1:4
d)
1:1
43.
What is the minimum slope recommended for house drains?
a)
1 in 30
b)
1 in 100
c)
1 in 50
d)
1 in 150
44.
Assertion (A): Gully traps are provided at ground level for waste outlets. Reason (R): Gully traps allows direct connection of waste pipe to main drain.
a)
Both A and R are true, and R is the correct explanation
b)
Both A and R are true, but R is not the correct explanation
c)
A is true, R is false
d)
A is false, R is true
45.
Which joint uses bell and spigot ends with lead or rubber packing?
a)
Flanged joint
b)
Socket joint
c)
Butt joint
d)
Expansion joint
46.
In plumbing, which trap has a deeper water seal and is used for inspection?
a)
Nahani trap
b)
Intercepting trap
c)
Floor trap
d)
P trap
47.
What is the recommended size of sight rail used in sewer pipe laying?
a)
50 mm × 50 mm
b)
75 mm × 75 mm
c)
100 mm × 100 mm
d)
150 mm × 150 mm
48.
Which test involves applying air pressure to detect sewer pipe leaks?
a)
Smoke test
b)
Water test
c)
Mirror test
d)
Air test
49.
What is the purpose of providing manholes in a drainage system?
a)
Allow light to enter pipe
b)
Connect different pipelines
c)
Provide access for cleaning and inspection
d)
Act as a trap
50.
Which material is ideal for house drainage pipes due to its smooth interior?
a)
Cast iron
b)
Lead
c)
Stoneware
d)
RCC
51.
Statement: Smoke test is more reliable than water test for underground sewers.
a)
True
b)
False
c)
Only for shallow lines
d)
Only for vertical pipes
52.
During pipe laying, which direction should the socket end face?
a)
Downstream
b)
Upstream
c)
Sideways
d)
To manhole
53.
What is used to block pipe ends during pressure testing?
a)
Stop cock
b)
Sluice valve
c)
Plugs
d)
Ferrule
54.
Which trap is generally used below washbasins or sinks?
a)
Intercepting trap
b)
Gully trap
c)
Floor trap
d)
Bottle trap
55.
Assertion (A): Proper jointing is critical in drainage pipes. Reason (R): Leaky joints cause ground contamination and foul smells.
a)
Both A and R are true, and R is the correct explanation
b)
Both A and R are true, but R is not the correct explanation
c)
A is true, R is false
d)
A is false, R is true
56.
What is the purpose of backfilling sewer trenches in layers?
a)
To increase excavation depth
b)
To provide strength and compaction
c)
To reduce cost
d)
To ease pipe removal
57.
Which device is used to measure internal water pressure in pipelines?
a)
Sluice valve
b)
Air valve
c)
Manometer
d)
Stop cock
58.
Which valve is installed at the highest point in water distribution lines to remove air?
a)
Scour valve
b)
Foot valve
c)
Air valve
d)
Check valve
59.
Which sanitary fitting is placed outside the building to intercept foul gases?
a)
Gully trap
b)
P trap
c)
Intercepting trap
d)
Floor trap
60.
Assertion (A): Gully traps are used to discharge waste water from bathrooms and kitchens. Reason (R): Gully traps prevent foul gases from entering the building.
a)
Both A and R are true and R is the correct explanation
b)
Both A and R are true but R is not the correct explanation
c)
A is true but R is false
d)
A is false but R is true
61.
Which device is used to measure the amount of water consumed in a household?
a)
Stop cock
b)
Water meter
c)
Goose neck
d)
Union joint
62.
Which of the following is provided in plumbing to release foul gases safely above roof level?
a)
Soil pipe
b)
Waste pipe
c)
Vent pipe
d)
Service pipe
63.
Which valve prevents reverse flow of water in pump systems?
a)
Sluice valve
b)
Check valve
c)
Air valve
d)
Scour valve
64.
The minimum cover for underground drainage pipes is:
a)
20 cm
b)
30 cm
c)
45 cm
d)
60 cm
65.
Which of the following pipes is best suited for acidic wastewater?
a)
Cast iron
b)
Vitrified clay
c)
Steel
d)
PVC
66.
In a one-pipe plumbing system, which pipe connects all waste and soil pipes?
a)
Drain pipe
b)
Vent pipe
c)
Single discharge pipe
d)
Combined pipe
67.
Which system uses a separate pipe for each waste type with ventilating pipes provided?
a)
One-pipe system
b)
Two-pipe system
c)
Single stack system
d)
Partially ventilated system
68.
Which type of pipe joint uses molten lead for sealing?
a)
Flexible joint
b)
Spigot and socket joint
c)
Expansion joint
d)
Screwed joint
69.
Which joint is best suited for areas with vibrations and movement?
a)
Dresser coupling joint
b)
Screwed joint
c)
Collar joint
d)
Flanged joint
70.
Which pipe material is commonly used for high-pressure water supply?
a)
Lead pipes
b)
Plastic pipes
c)
Cast iron pipes
d)
Asbestos cement pipes
71.
What is the function of the rubber gasket in a flanged joint?
a)
Make joint fireproof
b)
Prevent leaks
c)
Allow expansion
d)
Join concrete sections
72.
Which joint is also known as bell and spigot joint?
a)
Collar joint
b)
Flanged joint
c)
Flexible joint
d)
Spigot and socket joint
73.
Which pipe joint uses a collar filled with cement mortar?
a)
Collar joint
b)
Screwed joint
c)
Expansion joint
d)
Flexible joint
74.
Which type of joint allows free expansion and contraction of pipes?
a)
Flanged joint
b)
Screwed joint
c)
Expansion joint
d)
Spigot joint
75.
What is used to detect leaks in pipe joints during testing?
a)
Soap water
b)
Cement grout
c)
Rubber gasket
d)
Caulking tool
76.
Which joint uses white lead paste to ensure water tightness?
a)
Dresser coupling joint
b)
Screwed joint
c)
Collar joint
d)
Flexible joint
77.
Which joint allows flexible connection and can be laid under water?
a)
Flanged joint
b)
Screwed joint
c)
Simplex joint
d)
Spigot and socket joint
78.
Which pipe joint is typically used for small diameter cast iron pipes?
a)
Dresser coupling joint
b)
Screwed joint
c)
Flanged joint
d)
Flexible joint
79.
Which pipe material is best for resisting corrosion in underground lines?
a)
Copper pipes
b)
Plastic pipes
c)
Lead pipes
d)
Steel pipes
80.
Which pipe joint is used for long lengths of concrete or asbestos cement pipes?
a)
Collar joint
b)
Flexible joint
c)
Screwed joint
d)
Flanged joint
81.
What type of stress is caused by water hammer in pipes?
a)
Stress due to yield of soil
b)
Stress due to internal water pressure
c)
Stress due to temperature change
d)
Stress due to water hammer
82.
Which joint is commonly used for jointing cast iron pipes using lead?
a)
Screwed joint
b)
Spigot and socket joint
c)
Dresser joint
d)
Victaulic joint
83.
What is the main purpose of anchoring pipes with thrust blocks?
a)
To distribute pressure evenly
b)
To allow pipe movement
c)
To restrict pipe expansion
d)
To prevent pipe displacement at junctions
84.
Which pipe joint uses lead as the filling material and is mostly used for cast iron pipes?
a)
Spigot and socket joint
b)
Collar joint
c)
Expansion joint
d)
Simplex joint
85.
What is the purpose of a collar joint in pipe laying?
a)
To resist vibrations
b)
To cover large distances
c)
To seal joints
d)
To support valves
86.
In a flanged joint, what component ensures water tightness between the flanges?
a)
Washer
b)
Rubber gasket
c)
Lead
d)
Cement mortar
87.
Where is a flexible joint commonly used?
a)
At bends
b)
On slopes
c)
On flat surfaces
d)
None
88.
Which joint is suitable for absorbing vibrations and shocks?
a)
Expansion joint
b)
Dresser coupling joint
c)
Victaulic joint
d)
Flexible joint
89.
What is the primary feature of a mechanical joint?
a)
Uses flange rings
b)
Uses bolts and gaskets
c)
Uses solder
d)
Uses sealing paste
90.
Which joint is most commonly used in cast iron pipe lines?
a)
Socket joint
b)
Collar joint
c)
Flanged joint
d)
Spigot joint
91.
What is used to make the joint water-tight in a screwed joint?
a)
Rubber gasket
b)
White lead
c)
Teflon tape
d)
Pipe adhesive
92.
Which joint uses rubber rings and couplings to connect plain pipe ends?
a)
Simplex joint
b)
Dresser coupling joint
c)
Victaulic joint
d)
Screwed joint
93.
What is the main function of anchoring pipes during pipe laying?
a)
To hold pipe sections together
b)
To handle flow
c)
To distribute hydraulic thrust
d)
To provide gradient
94.
Which operation in pipe laying ensures the correct position of the pipe alignment?
a)
Backfilling
b)
Fixing the alignment
c)
Excavation
d)
Preparation of maps
95.
What is the recommended thickness of concrete bed under the pipe trench?
a)
100 mm
b)
150 mm
c)
200 mm
d)
120 mm
96.
Which component is wrapped around the spigot end in a spigot and socket joint?
a)
Teflon tape
b)
Hemp or yarn
c)
Steel wire
d)
Bitumen
97.
Which joint consists of a middle ring, follower rings, and rubber gaskets?
a)
Dresser coupling joint
b)
Expansion joint
c)
Flanged joint
d)
Simplex joint
98.
Which type of pipe joint is used for small diameter pipes with threaded ends?
a)
Simplex joint
b)
Screwed joint
c)
Spigot joint
d)
Bell and spigot joint
99.
What is the function of a concrete thrust block?
a)
To reduce flow velocity
b)
To distribute load
c)
To join bends
d)
To absorb shock
100.
Which joint requires the spigot end to be plain and have a bead at the end?
a)
Flexible joint
b)
Expansion joint
c)
Universal joint
d)
Bell joint
101.
In which joint is the molten lead poured and caulked to ensure watertightness?
a)
Screwed joint
b)
Flexible joint
c)
Spigot and socket joint
d)
Collar joint
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