NCVT ITI FITTER TRADE ALL INDIA TRADE TEST PAPER FEB 2018 SEM 4 PART 1

1) The purpose of normalizing steel is …… 

Increase the toughness and reduce brittleness

Improve machineability

Soften the steel

Remove induced stresses & refine grain size

Correct answer

Remove induced stresses & refine grain size

2) The toughness in steel is increased and brittleness is decreased by a treatment operation called as ……. 

Tempering

Case heading

Annealing

Normalizing

Correct answer

Tempering

3) Heat treatment of metal is necessary? 

To produce certain desired properties

To increase the strength of metals

To avoid corrosion on metal

To make a good appearance on the component

Correct answer

To produce certain desire properties

4) The lower critical temperature of high carbon steel while hardening is 

723°C

900°C

560°C

960°C

Correct answer

723°C

5) What is the main purpose of annealing? 

To improve magnetism

To improve hardness

To increase toughness

To improve machinability & soften the steel

Correct answer

To improve machinability & soften the steel

6) While normalizing the steel should be cooled 

In oil

In water

In forced air

In still air to room temperature

Correct answer

In still air to room temperature

7) The process of increasing carbon percentage on the surface of low carbon steel is known as …… 

Hardening

Carburizing

Tempering

Nitriding

Correct answer

Carburizing

8) The induction coil is made from ……… material 

Tin

Silver

Mild steel

Copper

Correct answer

Copper

9) Solder is an alloy of ………… & …………… 

Brass and zinc

Copper and tin

Tin and lead

Copper and zinc

Correct answer

Tin and lead

10) Which metal is used for a bit of hatched soldering iron? 

Brass

Cast iron

Copper

Mild steel

Correct answer

Copper

11) Spelter is an alloy of …………… & ………… 

Copper and zinc

None of these

Tin and lead

Brass and zinc

Correct answer

Copper and zinc

12) Which type of flux is used for brazing? 

HCL

Resin

Borax

Sodium carbonate

Correct answer

Borax

13) What is the name of filler metal in brazing? 

Sweating

Flux

Spelter

Base metal

Correct answer

Spelter

14) Which is the main advantage of interchangeability? 

Help for mass production

Less Rejection

Part changeable after damages

All of these

Correct answer

All of these

15) Spirit level is used for ………… 

Testing for machine

For starting of the machine

Foundation of machine

While the machine is erected

Correct answer

Foundation of machine

16) ………………… is necessary for continues better production. 

Routine maintenance

Preventive maintenance

Break down maintenance

None of these

Correct answer

Preventive maintenance

17) …………… gauge is used to checking external threads of the pipe. 

Thickness gauge

Thread gauge

Thread ring gauge

Centre gauge

Correct answer

Thread ring gauge

18) ……………… is used for supplying water from the main line. 

Union

Taps

Valves

Cock

Correct answer

Valves

19) In pipeline fitting accessory used to pipe pieces short or long is called 

Union

Reducer

Nipple's

Plug

Correct answer

Nipple's

20) Generally fitting for big diameter pipe joint ………… is used. 

Plug

Flange

Socket

Union

Correct answer

Flange

21) Which accessory is used for fitting branch line to mainline? 

Union

Flange

Tee

Elbow

Correct answer

Tee

22) In pipe fitting which accessory is used for four-way pipe fitting? 

Elbow

Tee

cross

Socket

Correct answer

cross

23) Which accessory is used in pipe fitting of different diameter pipe joint each other for increase the length? 

Socket

Flange

Reducer

Union

Correct answer

Reducer

24) Which one is used for joint connection in pipeline without any destruction? 

Union

Plug

Socket

Cross

Correct answer

Union

25) Which of the following is the including angle of pipe thread? 

60°

29°

55°

27.5°

Correct answer

55°