NCVT ALL INDIA TRADE TEST PAPER FOR FITTER TRADE AUG 2016 SEM 4 PART 1

1) The following is machined dry. 

Aluminum

Cast iron

Titanium

All of these

Correct answer

Cast iron

2) The following device is used to determine the mix ratio of water-soluble coolants: 

Diffract meter

Hydrometer

Refract meter

None of these

Correct answer

Refract meter

3) The use of metalworking fluids ..........................

Increases the tool life

Produces better surface finish

Prevents rise in temperature

All of these

Correct answer

All of these

4) The main constituent(s) of mineral oil is/ are ...................... 

Paraffin

Naphthenic

Aromatics

All of these

Correct answer

All of these

5) The following is used in the heat treatment process as a quenching medium for obtaining a higher degree of hardness. 

Waxes

Mineral oil

Fatty acid

Graphite suspensions

Correct answer

Fatty acid

6) Which of the following is added to the cutting fluids so that soapy film is produced between the workpiece & tool and chip & tool face? 

a) Sulphur

b) Chlorine

c) Both (a) and (b)

d) None of these

Correct answer

c) Both (a) and (b)

7) Soluble oil is used as a cutting fluid in ...................... 

Sawing

Drilling and boring

Reaming

All of these

Correct answer

All of these

8) Usually, no cutting oil is used in ....................... 

Honing

Broaching

Thread rolling

Planning and shaping

Correct answer

Planning and shaping

9) Choose the name of the bolt 

Gib Headed foundation bolt

Through foundation bolt

Cotter foundation bolt

Eye foundation bolt

Correct answer

Eye foundation bolt

10) ...................are used to separate the tramp oil (sump oil) from the coolant. 

Magnetic separators

Skimmers

Rotating spindles

All of these

Correct answer

Skimmers

11) Which of the following parameters influence the axial feed rate in centreless grinding? 

Regulating wheel diameter

The angle between the axes of grinding and regulating wheels

The speed of the regulating wheel

All of these

Correct answer

All of these

12) Hydraulic oil is compressible ................ 

Not at all

Very much

Very Little

None of these

Correct answer

Very Little

13) Power = Torque x ........................... 

RPM

Force

Area

Velocity

Correct answer

RPM

14) .................. is a prime mover in the hydraulic system. 

Oil

Pipe

Impeller

Electric Motor

Correct answer

Electric Motor

15) Power of Pump = ................... x Volume flow rate. 

RPM

Velocity

Pressure

Force

Correct answer

Pressure

16) 1 HP = ................. W 

100

746

764

1000

Correct answer

746

17) Which flat belt drive system has two pulleys mounted on the driven shaft and one pulley on the driving shaft? 

Multiple belt drive

Cone pulley drive

Fast and loose pulley drive

None of these

Correct answer

Fast and loose pulley drive

18) Which of the following statements are false for belt drives? 

(I) Belt drive is used in applications having constant speed drive 

(ii) Belt drives can be used at extremely high speeds 

(iii) Belt drives have low power transmitting capacity 

(iv) Belt drives need continuous lubrication 

(i) and (ii)

(i), (ii) and (iii)

(ii), (iii) and (iv)

(i), (ii) and (iv)

Correct answer

(i), (ii) and (iii)

19) Determine power rating of an electric motor if it runs at 1440 r.p.m and line shaft transmits torque of 75 Nm. Assume Reduction ratio = 1:6 

11.3 kW

9.12 kW

7.068 kW

10.36 kW

Correct answer

7.068 kW

20) In a simple gear train, the direction of rotation of driven gear is opposite to the direction of rotation of driving gear only if ................ 

Even the number of idler gears are present

An odd number of idler gears are present

Any number of idler gears are present

None of these

Correct answer

Even the number of idler gears are present

21) Why is an idler gear used in gear trains? 

a) To obtain the minimum center distance between driving and driven shaft

b) To have required direction o rotation

c) Both (a) and (b)

d) None of these

Correct answer

b) To have required direction o rotation

22) Determine torque transmitted on the pinion shaft if torque transmitted on gear shaft is 20 Nm, consider Gear ratio = 4:1 

8 Nm

5 Nm

80 Nm

16 Nm

Correct answer

5 Nm

23) Which of the following statements is/are true for gear drives? 

They can be used for long center distances

They are used to transmit power between non-intersecting and parallel shafts

They cannot be used for high reduction ratios

All of these

Correct answer

They are used to transmit power between non-intersecting and parallel shafts

24) Which gears are used to connect two intersecting shaft axes? 

Crossed helical gear

Worm and worm wheel

Bevel gears

All of these

Correct answer

Bevel gears

25) What is meant by gear ratio? 

a) The ratio of pinion speed and gear speed

b) The ratio of number of teeth on the pinion and the number of teeth on the gear

c) Both (a) and (b)

d) None of these

Correct answer

c) Both (a) and (b)