EASY PSC | 073/2021 - Meter Reader - Kerala Water Authority Answer Key

Question 1

What is the ratio of lead and tin contains in a common solder ?

A

1 : 1

B

1 : 2

C

2 : 1

D

1 : 3

Question 2

Melting point of copper is

A

327 °C

B

1083 °C

C

648 °C

D

215 °C

Question 3

Compressive strength of first class bricks is not less than

A

35 kg/cm^2

B

70 kg/cm^2

C

105 kg/cm^2

D

140 kg/cm^2

Question 4

The mixture of cement, sand, aggregate and water is called

A

Concrete

B

Mortar

C

Mixture

D

Grout

Question 5

The main part of a gully trap is

A

Inlet

B

Outlet

C

Water seal

D

Grating

Question 6

The standard pipe thread

A

BSW

B

BSP

C

BA

D

BAP

Question 7

What process is used for removal of pathogenic bacteria from water ?

A

Screening

B

Sedimentation

C

Filtration

D

Chlorination

Question 8

Temporary hardness in water is also known as

A

Hyper hardness

B

Carbonate hardness

C

Mild hardness

D

Sulphate hardness

Question 9

An underground source of water

A

Springs

B

Ponds

C

Lakes

D

Rain

Question 10

Bend (F+F) means

A

Bend without thread

B

Bend 45°

C

Bend with both end external thread

D

Bend with both end internal thread

Question 11

Zeolite process is used to remove

A

Impurities

B

Water hardness

C

Bacteria

D

Turbidity

Question 12

Colour band for high grade GI pipe

A

Red band

B

Yellow band

C

Blue band

D

Black band

Question 13

Pipe wrench is used for pipes of diameter

A

0 to 15 mm

B

20 to 100 mm

C

15 to 50 mm

D

25 to 75 mm

Question 14

PVC pipes are used for temperature below

A

140 °F

B

140 °C

C

87 °F

D

60 °F

Question 15

What is the storing capacity of oxygen gas cylinder for welding ?

A

7 m^3

B

16 m^3

C

6 m^3

D

17 m^3

Question 16

A pressure which results from sudden stoppage of the flow of water in a closed pipe is known as

A

Water hammer

B

Water pressure

C

Velocity

D

Pressure head

Question 17

All gases burn with the help of

A

Hydrogen

B

Acetylene

C

Nitrogen

D

Oxygen

Question 18

Which tree is used for basket making ?

A

Teak

B

Bamboo

C

Chir

D

Mango

Question 19

The instrument used to check the colour of water

A

Tintometer

B

Manometer

C

Osmoscope

D

Spectroscope

Question 20

What distance Indian Water Closet is fixed away from the wall ?

A

400 mm

B

350 mm

C

100 mm

D

250 mm

Question 21

Water having pH less than ‘7’ is

A

Alkaline water

B

Neutral water

C

Acidic water

D

None of these

Question 22

Solvent jointed pipe lines should not be pressure tested until

A

6 hrs

B

12 hrs

C

18 hrs

D

24 hrs

Question 23

How are the PVC pipes specified ?

A

By outer dia of pipe

B

By inner dia of pipes

C

By nominal bore

D

By the length

Question 24

___________ is a mode of heat transfer which required no material medium

A

Conduction

B

Convection

C

Radiation

D

Reaction

Question 25

State the use of die sets.

A

To cut pipes

B

To cut holes

C

To cut external threads

D

To cut internal threads

Question 26

Welding is a _________ fastening.

A

Permanent

B

Semi permanent

C

Temporary

D

None of these

Question 27

Minimum size of GI pipe for water supply

A

6 mm

B

12 mm

C

0.5 mm

D

20 mm

Question 28

Smallest measurement from a steel rule is

A

0.5 cm

B

0.5 mm

C

0.5 inch

D

0.1 mm

Question 29

Bronze is an alloy of

A

Copper and Tin

B

Copper and Zinc

C

Tin and Zinc

D

None of these

Question 30

Bacteria which causes reduction of sludge in a septic tank

A

Aerobic

B

Anerobic

C

Coliform

D

Yeast

Question 31

A nipple has

A

Male thread on both ends

B

Female thread on both ends

C

No threads on both ends

D

None of these

Question 32

Dual system of distribution means

A

Gravity system

B

Pumping system

C

Gravity and pumping system

D

Intermittent and continuous system

Question 33

A structure constructed for drawing water from reservoir is called

A

Dams

B

Intakes

C

Overflows

D

Wells

Question 34

What is the advantage of needle valve ?

A

Fine control over the flow

B

Easy control the flow

C

Used as wash out

D

Automatic control

Question 35

Coal tar coating is done to CI pipes for

A

To protect the pipes from corrosion

B

To joint pipes

C

To get smooth flow

D

To absorb more pressure

Question 36

State the advantages of steel pipes.

A

Affect corrosion

B

Easy to bend

C

Can withstand high pressure

D

Not affect saline water

Question 37

Where are flanged joints preferred ?

A

In sewer lines

B

In temporary pipe lines

C

For AC pipes

D

For PVC pipe lines

Question 38

Why foot valves are provided in suction pipe ?

A

For the safety of the pump

B

For holding water in suction line

C

For the safety of pipe lines

D

To get more efficiency

Question 39

What is the advantage of intermittent water supply ?

A

Can supply to high level with pressure

B

24 hours water supply

C

Has to store water

D

Get minimum pressure

Question 40

What should be the moisture content when density of timber is determined ?

A

12%

B

10%

C

8%

D

15%

Question 41

Volume of one bag of cement is

A

3.5 m^3

B

0.0035 m^3

C

0.35 m^3

D

0.035 m^3

Question 42

A pump having impeller is

A

Displacement pump

B

Centrifugal pump

C

Hydraulic ram

D

Reciprocating pump

Question 43

A soil fixture is

A

Wash basins

B

Bath tub

C

Urinals

D

Bathroom

Question 44

A bolt has __________ thread.

A

Internal

B

External

C

No threads

D

None of these

Question 45

Standard length of a hacksaw blade is

A

30 mm

B

30 cm

C

30 inch

D

30 m

Question 46

Siphonic action is prevented by

A

Trap

B

Cowl

C

Inspection chamber

D

Vent pipe

Question 47

Safety valve controls

A

Air flow

B

Water flow

C

Overflow

D

Excessive pressure

Question 48

How many days curing is required for cement joints ?

A

7 days

B

15 days

C

2 days

D

10 days

Question 49

While grinding metals, safety device used is

A

Apron

B

Gum boots

C

Goggles

D

Helmet

Question 50

The material used for providing benching is

A

Cement concrete

B

Bricks

C

Cement mortar

D

PVC

Question 51

Which is the IS code for 33 grade cement ?

A

IS 8112

B

IS 2665

C

IS 1812

D

IS 2656

Question 52

To tighten and loosen pipe fittings ________ is more useful.

A

Spanner

B

Monkey plier

C

Pipe wrench

D

Chain vice

Question 53

A waterproof chemical is

A

Ceroplastic

B

Solvent

C

Putty

D

Plaster of paris

Question 54

How to prevent algae growth in OH tank ?

A

By use of bleaching powder

B

By use of copper sulphate

C

By use of chlorine

D

By use of lime

Question 55

Why traps are fitted in drainage system ?

A

To prevent waste water

B

To prevent blocks

C

To avoid repairs

D

To prevent foul gas

Question 56

How many pipes are there in a one pipe system ?

A

1

B

2

C

3

D

4

Question 57

What is the initial requirement to start a centrifugal pump ?

A

It should have electricity

B

It should have 50 ft head

C

It should have minimum 8 m suction head

D

It should be full of water in pump

Question 58

Which is a process of water treatment ?

A

Intake

B

Coagulation

C

Storing

D

Pumping

Question 59

State the advantage of composite pipes.

A

Easily break

B

Curves can be easily formed

C

Easy to joint

D

Used in main lines

Question 60

Expand the FD used in building drawings.

A

Fixed Door

B

Fixed Din

C

Floor Dirt

D

Floor Drain

Question 61

How effluents from septic tank is disposed off ?

A

soak pit

B

Leach pit

C

Cesspool

D

Privy

Question 62

What is the standard size of measuring box for aggregate ?

A

40 × 30 × 20 cm

B

40 × 35 × 25 cm

C

30 × 30 × 20 cm

D

40 × 35 × 20 cm

Question 63

Why mirror test is carried out ?

A

To check the alignment

B

To check leaks

C

To check gradient

D

To check water tightness

Question 64

How much is the average quantity of sewage per capita per day ?

A

125 litre/day/person

B

100 litre/day/person

C

90 litre/day/person

D

135 litre/day/person

Question 65

What is the height of fixing of automatic cistern for urinal ?

A

1800 mm

B

1900 mm

C

2000 mm

D

2100 mm

Question 66

Size of waste fitting of wash basin is

A

25 mm

B

32 mm

C

40 mm

D

50 mm

Question 67

The valve which prevents the back flow of water is

A

Sluice valve

B

Butterfly valve

C

Needle valve

D

Check valve

Question 68

The water which is safe to drink is

A

Colourless water

B

Clear water

C

Potable water

D

Bottled water

Question 69

Bricks are laid

A

With frog down

B

Frog side

C

With frog up

D

None of these

Question 70

One of the benefits of rain water harvesting is

A

Reduce salinity

B

Reduce impurities

C

Avoid smell

D

Change colour

Question 71

The length of GI pipes available in market is

A

3 m

B

4.5 m

C

5 m

D

6 m

Question 72

The dia. of the hose which is usually connected to the post hydrant is

A

63 mm

B

50 mm

C

40 mm

D

100 mm

Question 73

The first artificial cement is

A

Portland cement

B

Birla white

C

Grey cement

D

Pozzolona 23 grade

Question 74

Soil pipe is the pipe which connects the water closet to

A

Trap

B

Septic tank

C

Vent pipe

D

Siphonage pipe

Question 75

The gas produced in the septic tank is

A

Methane

B

Propane

C

Butane

D

CNG

Question 76

A CID joint has __________ rubber rings

A

1

B

2

C

3

D

4

Question 77

1 m^3 of water is equal to ____________ litre.

A

100

B

1000

C

10000

D

4.54

Question 78

IS number of water closet is

A

IS 2565

B

IS 776

C

IS 2548

D

IS 2556

Question 79

Aluminium is extracted from

A

Galena

B

Pyrite

C

Bauxite

D

Limonite

Question 80

Scour valve is provided for

A

Safety

B

Priming

C

Check back flow

D

Wash out

Question 81

Cast Iron Pipes are made of

A

Grey Cast Iron

B

Chilled Cast Iron

C

Malleable Cast Iron

D

White Cast Iron

Question 82

It is used for carrying excavated materials

A

Spade

B

Jack Plane

C

Mortar Pan

D

Trowel

Question 83

The fitting used on pipeline for easy to dismantle and repair

A

Tee

B

Elbow

C

Coupling

D

Union

Question 84

Flanged joints are proffered in pipeline for

A

Temporary Joint

B

Permanent Joint

C

Piece Pipe Joint

D

Underground Pipe Joint

Question 85

Which type of Bender has tripod stand ?

A

Bench pipe bender

B

Hydraulic bending machine

C

Portable hand operated pipe bender

D

Machine bender

Question 86

Carbonate hardness means

A

Temporary hardness

B

Permanent hardness

C

Colloidal hardness

D

None of these

Question 87

The system requires less number of valves and design of pipe size is easy

A

Circular system

B

Radial system

C

Dead end system

D

Ring system

Question 88

PPR means

A

Poly Plastic Ready Pipe

B

Poly Propylene Random Pipe

C

Pre Polymer Random Pipe

D

Perfect Polyvinyl Random Pipe

Question 89

The pump fitted in water supply line to increase pressure

A

Jet pump

B

Air lift pump

C

Booster pump

D

Hand pump

Question 90

The tap used in lavatory basin

A

Pillar taps

B

Bib tap

C

Plug tap

D

Waste-not tap

Question 91

In plumbing system, there is no ventilation pipe

A

One pipe system

B

Single stack system

C

Two pipe system

D

Partially separate system

Question 92

Maximum size of aggregates used for RCC pipes is

A

4 mm

B

6 mm

C

25 mm

D

32 mm

Question 93

In hand pump, when the handle lowered, then piston is

A

Upward

B

Downward

C

No movement

D

None of these

Question 94

The test applied in sanitary pipe for alignment checking

A

Small Test

B

Hydraulic Test

C

Absorption Test

D

Ball Test

Question 95

When sudden closing a valve causes of

A

Air lock

B

Frictional loss

C

Water hammer

D

Broken valve

Question 96

The chemical used for smell test

A

Peppermint oil

B

Copper sulphate

C

Dettol

D

Shampoo or soap

Question 97

Plumb bob is used to verify

A

Horizontal level

B

Surface level

C

Parallel level

D

Vertical level

Question 98

Rasp cut file commonly used for

A

Shaping

B

Milling

C

Wood work

D

Fabricated

Question 99

It is a part of water tap

A

Peen

B

Inner former

C

Spindle

D

Heal

Question 100

IS code of pipe wrench is

A

IS : 4003

B

IS : 3489

C

IS : 2587

D

IS : 4066