D59 RAPID RECALL

Multiple Choice

Which joint is most commonly used for cast iron and RCC pipes?

• Collar joint

• Screwed joint

• Spigot and socket joint

• Flanged joint

Fill in the Blank

The space between the pipe and the collar in a collar joint is packed with cement mortar of ratio __________.

:

Dropdown

The Simplex joint allows a deflection of

​

Select answer

Drag and Drop

​

Placeholder

Which sewer joint is called a ring-tie coupling?

Drag these tiles and drop them in the correct blank above

simplex

mechanical 

flanged

open

Multiple Choice

Which joint is commonly used for temporary pipe connections and is easy to dismantle?

• Mechanical joint

• Screwed joint

• Flanged joint

• Collar joint

Fill in the Blank

In a collar joint, gap is filled with __________ instead of mortar in flexible joint.

Multiple Choice

Flexible joints are used at places where settlement is more.

• True

• False

Match

Match the following

• Screwed joint

• Flexible joint

• Flanged joint

• Collar joint

Small diameter metal pipes

Settling areas

Temporary connections

Plain ends of asbestos/concrete

• Small diameter metal pipes

• Settling areas

• Temporary connections

• Plain ends of asbestos/concrete

Multiple Choice

Which joint involves bolting around the pipe using a rubber ring and can bear shocks and vibrations?

• Flanged joint

• Victaulic joint

• Screwed joint

• Spigot joint

Multiple Choice

Assertion (A): Screwed joints are used for small diameter pipes.
Reason (R): They provide a water-tight seal using jute soaked in white lead.

• A and R both true, R explains A

• A and R both true, R doesn’t explain A

• A is true,R is false

• A is false,R is false

Fill in the Blank

The type of joint used for metallic sewer pipes is the __________ joint.

Multiple Choice

What tool is used along with sight rails to check the gradient of trench?

• Boning rod

• Tripod

• Spirit level

• Staff

Fill in the Blank

In water testing of sewers, the pressure is maintained at about __________ m depth of water.

-

.

Dropdown

​

Select answer

In air testing of sewers, the pressure is maintained at:

Fill in the Blank

The trench width for laying sewer is external diameter of pipe + __________ cm

Fill in the Blank

The trench bottom is supported by a __________ bed of 150 mm.

Multiple Choice

During a smoke test, what indicates the presence of leaks in a sewer line?
A) Rising water
B) Smoke escape
C) Vibrations
D) Pressure drop

• Rising water

• Smoke escape

• Vibrations

• Pressure drop

Match

Match the following

• Mirror test

• Ball test

• Smoke test

• Boning rod

• Offset line method

Test for straightness

Test for obstruction

Test for leakage

Alignment and gradient

Setting out

• Test for straightness

• Test for obstruction

• Test for leakage

• Alignment and gradient

• Setting out

Multiple Choice

Backfilling of sewer trench is done in 15 cm layers, tamped and watered.

• True

• False

Multiple Choice

The socket end of the pipe should face upstream during sewer laying.

• True

• False

Fill in the Blank

The sight rails are __________ boards spanning the entire width of the trench.

Drag and Drop

​

Placeholder

In which test is soap solution applied to joints to detect leaks?

Drag these tiles and drop them in the correct blank above

Air test

Mirror test

Smoke test

Water test