NCVT ALL INDIA TRADE TEST PAPER FOR FITTER TRADE AUG 2016 SEM 4 PART 2

1) What is the function of the hydraulic motor? 

1. The hydraulic motor converts hydraulic oil under pressure into torque and angular displacement 

2. The hydraulic motor converts hydraulic oil under pressure into force and linear displacement 

3. The hydraulic motor converts hydraulic energy into mechanical energy 4. The hydraulic motor converts mechanical energy into hydraulic energy 

1 and 4

1 and 3

2 and 3

2 and 4

Correct answer

1 and 3

2) Calculate the area of a pipe if, the flow rate is 20 liters/min and flow velocity is 5 cm/s. 

 

3) What this hydraulic symbol means ................ 

Motor unidirectional

Motor bidirectional

Pump unidirectional

Pump bidirectional

Correct answer

Motor unidirectional

4) In soldering the melting point of filler metal is .................... 

Above 420°C

Below 420°C

Above 520°C

Below 520°C

Correct answer

Below 420°C

5) The composition of electrician solder is .......... 

Lead-63%, tin-37%

Lead-70%, tin-30%

Lead-37%, tin-63%

Lead-50%, tin-50%

Correct answer

Lead-37%, tin-63%

6) The composition of soft solder is .................... 

Lead-70%, tin-30%

Lead-50%, tin-50%

Lead-63%, tin-37%

Lead-37%, tin-63%

Correct answer

Lead-37%, tin-63%

7) Corrosion can be prevented by ..................... 

Alloying

Tinning

Galvanizing

None of these

Correct answer

Alloying

8) As compared to iron, aluminium has ................ 

Higher tendency to oxidize

Less tendency to oxidize

Equal tendency to oxidize

None of these

Correct answer

Higher tendency to oxidize

9) Conditions for good electroplating is/are ................... 

High current density

Low temperature

High concentration of metal in the electrolyte

All of these

Correct answer

All of these

10) Iron is galvanized by coating with ................ 

Nickel

Tin

Zinc

Copper

Correct answer

Zinc

11) Which defect arises due to faulty heat treatment? 

Overheating and burning

Oxidation and decarburization

Cracks, distortion, and warping

All of these

Correct answer

All of these

12) In general, hardening is followed by ............. 

Annealing

Case hardening

Tempering

Normalizing

Correct answer

Tempering

13) This type of fastener is designed to prevent movement between shafts and wheels. 

Machine pins

Keys

Knuckle 

Rivets

Correct answer

Keys

14) A mechanical device that stores energy, when deflected and to return the equivalent amount of energy when released is known as a ............... 

Spring

Blind rivet

Hammer

Keyway

Correct answer

Spring

15) Joint strength in brazing operation is ................ 

As high as in gas or arc welding

Not as high as in gas or arc welding

Higher than that of in gas or arc welding

Unpredictable

Correct answer

Not as high as in gas or arc welding

16) Which of the following is a soft solder? 

Copper-zinc alloy

Nickel-silver alloy

Lead-tin alloy

All of these

Correct answer

Lead-tin alloy

17) Transmission angle is the angle between 

Input link and coupler

Output Link and coupler

Input link and fixed link

Output link and fixed link

Correct answer

Output Link and coupler

18) What this hydraulic symbol means 

Directional control valve (4 ports / 2 positions)

Directional control valve (4 ports / 3 positions)

Directional control valve (5 ports / 2 positions)

None of these

Correct answer

Directional control valve (4 ports / 2 positions)

19) Module of a gear is .............. 

2T/D

D/T

2D/T

T/D

Correct answer

D/T

20) When screw threads are to be used in a situation where power is being transmitted in one direction only, then the screw threads suitable for this will be ..................... 

Knuckle threads

Square threads

Acme threads

Buttress threads

Correct answer

Buttress threads

21) Which of the following materials has the maximum ductility? 

Zinc

Copper

Mild steel

Aluminum

Correct answer

Copper

22) The sleeve or muff coupling is designed as a ............... 

Dun cylinder

Thick cylinder

Hollow shaft

Solid shaft

Correct answer

Hollow shaft

23) In a flange coupling, the flanges are coupled together by means ................... 

Studs

Bolts and nuts

Headless taper bolt

None of these

Correct answer

Bolts and nuts

24) An open belt drive is used when ............. 

Shafts are arranged parallel and rotate in the same directions

The driven shaft is to be started or stopped whenever desired without interfering with the driving shaft

Shafts are arranged parallel and rotate in the opposite directions

Shafts are arranged at right angles and rotate in one definite direction

Correct answer

Shafts are arranged parallel and rotate in the same directions

25) When bevel gears connect two shafts whose axes intersect at an angle greater than a right angle and one of the bevel gears has a pitch angle 90°, then they are known as 

Crown bevel gears

Mitre gears

Internal bevel gears

Angular bevel gears

Correct answer

Crown bevel gears