1) Which of the following pipe is used for steam or heavy pressure gas

Cast iron pipe

GI pipe

wrought iron pipe

RCC pipe

Correct answer (C)

2) The material used for making washer of water tap, is

rubber

leather

Both (a) and (b)

None of these

Correct answer (C)

3) Gate valve is most suitable, where the pressure and flow are

more

loss

constant

None of these

Correct answer (C)

4) Stop valve is used in

(a) middle of main line

(b) starting of trench line

(C) Both (a) and (b)

(d) None of the above

Correct answer (C)

5) A change of direction (other than 900) in a pipe that brings one part out of, but parallel with the line of another pipe is known as what?

Break

Tee

Elbow

Offset

Correct answer (D)

6) Which one of the following is used to control the flow of water?

Swing chuck valve

Globe valve

Gate valve

None of these

Correct answer (B)

7) Which among the following methods is generally used to cut the threads on GI pipe?

By thread rollers

By centre lathe

By tap sets

By die and stock

Correct answer (D)

8) Which tool is used to tight or loose the pipe accessories?

Vice

Pipe wrench

Spanner

All of these

Correct answer (B)

9) Which is the included angle of pipe thread?

29°

55°

27°

None of these

Correct answer (B)

10) Which among the following is the cause for water flowing from tap even when firmly closed?

Spindle bent

Spindle threads worn out

Valve on the spindle loose

Defective washer

Correct answer (D)

11) Which pipe is used for pipelines in airplanes?

Cast iron pipe

Brass pipe

GI pipe

None of these

Correct answer (B)

12) Which accessory is used to connect the four side pipe fitting?

T

Valve

Elbow

Cross

Correct answer (D)

13) Which material is used for manufacturing non-return valve?

Bronze

Brass

Copper

Lead

Correct answer (A)

14) A hydraulic pipe bending machine can bend the pipes upto a diameter of ……..

50 mm

75 mm

90mm

60mm

Correct answer (B)

15) Which is the standard form of pipe thread?

BSF

BSW

BA

BSP

Correct answer (D)

16) Which among the following is the cause for loud noise in the tap when turned on?

Valve on the spindle loose

Spindle bent

Defective washer

Spindle threads worn out

Correct answer (C)

17) Non-return valve permits water supply in

one way

two way

three way

four way

Correct answer (A)

18) To connect two pipes at 90° angle accessory used is

T

elbow

bend

cross

Correct answer (A)

19) Which pipe is used in electrical wiring?

Hose pipe

Conduit pipe

RCC pipe

GI pipe

Correct answer (B)

20) Which accessory is used to connect branch pipe to main pipe?

Elbow

Cross

Reducer

T

Correct answer (D)

21) Which accessory is used to connect two pipes in a straight line?

Elbow

T

Cross

Socket

Correct answer (D)

22) Which accessory is used to block up the pipe on one end?

Union

T

Plug

Cross

Correct answer (C)

23) Which pipe is used for sewer line?

Hose pipe

RCC pipe

Copper pipe

GI pipe

Correct answer (B)

24) Gate valve is used in pipeline to let water flow in

one direction

two direction

three direction

None of these

Correct answer (B)

25) Which pipe is used by fire brigade?

Brass pipe

Hose pipe

Canvas pipe

GI pipe

Correct answer (C)

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