| Post Name | MACHINE OPERATOR GR.II - KERALA STATE CO-OPERATIVE COIR MARKETING FEDERATION Ltd |
|---|---|
| Question Paper Code | 146/2023 |
| Category Code | 657/2021 |
| Date of Test | 10 August 2023 |
| Medium of Question | ENGLISH |
| Exam Type | OMR Examination |
| Total Questions | 100 |
1
Which of the following statement is true for L-head Engines?
Answer
D. Both valves are provided on one side of Cylinder Block
2
Which is correct for Slot Skirt Pistons?
Answer
A. These are also called Constant Clearance Pistons
3
In which type of Scavenging, as Exhaust Valve is provided on top of cylinder?
Answer
B. Uniflow Scavenging
4
Which of the following is not a part of Crankshaft of an Engine?
Answer
D. Crank Throw
5
In Semi Floating type Piston Pins:
Answer
C. Piston Pin is fastened to the Connecting Rod
6
Which is the correct flow route of Exhaust gas from Cylinder?
Answer
B. Exhaust Manifold - Catalytic Converter - Muffler - Tail pipe
7
V G T is associated with :
Answer
B. Turbo Charger
8
Which Sensor gives information about the Valve Timing to ECU in Engines?
Answer
A. C M P Sensor
9
Which of the following statements are true in open belt drive?
(I) It is used between parallel shafts
(II) Driving and driven shafts are in same direction
(III) It is used in intersecting shafts
(IV) Driving and driven shafts in opposite direction
Answer
A. (I) and (II)
10
The difference between the tooth thickness and tooth space of a gear measured on the pitch
circle is termed as :
Answer
C. Backlash
11
Which of the following drive is used as speed reducer for non-intersecting, right angled shafts
with high velocity ratio?
Answer
C. Worm gears
12
In 14.5° full depth involute standard gear the addendum in terms of module (m) is:
Answer
A. m
13
Which of the followings are the essential properties of bearing materials?
(I) Good thermal conductivity
(II) Ability to deform slightly for compensating minor misalignments and surface
irregularities
(III) Ability to operate in the required temperature range
Answer
D. (I), (II) and (III)
14
What is the width of a saddle key in terms of the diameter of shaft ‘d’?
Answer
A. 0.25d + 2 mm
15
In the rope drive system, the diameter of the pulley should be :
Answer
B. Greater than 30 times of rope dia
16
Which standard lays down the standards for parallel or feather keys?
Answer
D. IS:2048
17
Which one of the following is used as lubricant where oil film cannot be maintained because
of the pressures or temperature?
Answer
A. Graphite
18
How many tolerance grades are there in Indian Standard System?
Answer
B. 18
19
What is the term represented by H in 25H7 tolerance size of a hole?
Answer
A. Fundamental deviation
20
The arithmetical difference between sizes of shaft and hole is negative before assembly that
is called as :
Answer
C. Interference
21
Match the following :
(P) Zero line (i) 25 Nos
(Q) Fundamental deviation (ii) Internal features
(R) Hole (iii) Actual size
(S) Measurement after manufacture (iv) Basic size
Answer
C. P-(iv), Q-(i), R-(ii), S-(iii)
22
Why the fundamental deviation symbol ‘H’ is chosen for holes?
Answer
B. Lower deviation of H is zero
23
In double start thread the lead is expressed I terms of pitch is:
Answer
C. L = 2p
24
Which thread uses in Instruments and other precision work?
Answer
B. BA thread
25
Which thread has one of its flanks is perpendicular to the axis of thread?
Answer
C. Buttress thread
26
Name the shape of grinding wheel used for sharpening milling cutters and reamers:
Answer
B. Flaring cup
27
Which tool angle is ground to prevent the tool rubbing from the work in a lathe?
Answer
A. Clearance angle
28
What is name of the gear unit of the lathe which consists of three gears, each having
same number of teeth?
Answer
C. Tumbler gear unit
29
What is the purpose of steady rest in a lathe?
Answer
B. To support a long job
30
How will be the face, if the tool is not set to the correct centre height while performing facing
on a lathe?
Answer
D. Pip at the centre
31
What is the formula for Index crank movement for Simple Indexing?
Answer
C. 40/N
32
What is the shape of Angle gauge?
Answer
A. Wedge
33
Which type of Cutter is used for Milling the flutes on Taps or Reamers?
Answer
D. Double and unequal angle cutter
A 7 146/2023
34
Name the process of enlarging a hole to a given depth to accommodate heads of socket screw:
Answer
B. Counter-boring
35
Which type of Maintenance is having the advantage of reduced Equipment failure?
Answer
C. Preventive maintenance
36
What is the expansion of “rpm” used in Drilling?
Answer
B. Revolution per minute
37
What is the property of Lubricant to withstand Pressure and remain on bearing surface?
Answer
A. Viscosity
38
Which one is an Example for Semi-liquid Lubricant?
Answer
D. Grease
39
Which is the common Cutting fluid used to reduce the heat produced by Tool and work?
Answer
B. Soluble Oil
40
In which portion of Drill the Flutes are cut?
Answer
A. Body
41
Why the Tap drill size to be calculated before Drilling?
Answer
C. To maintain sufficient material for the tap
42
What is the point angle of a general purpose drill?
Answer
B. 118º
43
Which of the following statement is/are correct about the basic components of CNC system?
(I) Program of Instructions
(II) Machine Control Unit (MCU)
(III) Machine tool or processing unit
Answer
D. All of the above (I), (II) and (III)
44
Which of the following statement is/are correct about the general safety precautions for the
safe machine operation on CNC Turning centers?
(I) First know all the emergency switches location before proceeding with operation
(II) Check the speed override position
(III) Do not use compressed air for cleaning
Answer
B. Only (I) and (III)
45
Which of the following statement is/are correct about the advantages of using linear motion
guideways?
(I) To decrease the heat smoothness
(II) To reduce the friction
(III) To reduce the amount of wear
Answer
C. Only (II) and (III)
46
Which of the following statement is/are correct about the absolute co-ordinate system?
(I) Based on the work end point
(II) Based on the origin
(III) Based on the tool geometry
Answer
B. Only (II)
47
Which one of the following command the G02 code Indicates?
Answer
A. Circular interpolation clockwise direction
48
Which mode is used for moving the turret in X and Z direction?
Answer
B. Jog mode
49
Which of the following machine is/are correct about the use for flat type of work where the
machining is done on only one face of the part in single set up?
(I) CNC horizontal machining centre
(II) CNC vertical machining centre
(III) CNC horizontal boring mil
Answer
B. Only (II)
50
Which code is used for “Program end and reset”?
Answer
D. M30
51
In Fire extinguishers, which colour band denotes carbon dioxide content?
Answer
D. Black
52
Different colour codes are available for waste segregation bins, which one of the following
coloured bin is used for collecting plastic waste?
Answer
B. Yellow
53
In ABC of first aid, what is the abbreviation of letter ‘B’?
Answer
A. Breating
54
Which of the following are the benefits of 5S methodology?
(I) Increases in productivity
(II) Increases in quality
(III) Reduction in initial investment
(IV) Improve operator efficiency.
Answer
C. (I), (II) and (IV)
55
In case of a medical emergency, which time period is referred as golden period?
Answer
B. First 30 Minutes
56
In First aid, what is the abbreviation of CPR?
Answer
B. Cardio-Pulmonary Resuscitation
57
Which one of the following tool is used for marking lines parallel to an edge, the edge may
curved or in any other profile shape?
Answer
D. Jenny caliper
58
What is the leastcount of vernier caliper having 24 main scale divisions coincide with
25 divisions of the vernier?
Answer
C. 0.04 mm
59
Which of the following statements are correct about jenny caliper?
(I) Jenny caliper is used for locating centre of round bars.
(II) Jenny caliper is otherwise called leg and point caliper.
(III) Jenny caliper is otherwise called Hermaphrodite caliper.
(IV) Jenny caliper is otherwise called Odd leg caliper.
Answer
D. (I), (II), (III) and (IV)
A 11 146/2023
60
Which one of the following statement is correct about Eye hole of Hammer?
Answer
B. Eye hole is an oval shaped taper hole
61
Bench vice is used for holding work pieces, which one of the following material is used for
making vice clamps?
Answer
D. Aluminium
62
Which one of the following statement is not correct about Combination set?
Answer
D. Square head is used for locating centre of round bars
63
In Micrometer, what is the distance advanced by the spindle in one complete revolution of the
thimble?
Answer
C. 0.5 mm
64
Which of the following statement is correct for Sandwich Jig?
(I) Used to locate the piece part from its face
(II) Ideal for thin or soft work pieces
(III) Easy loading and unloading of components
(IV) Used for drilling small piece parts
Answer
C. Only (II)
65
Which of the following statement is true about slip gages?
(I) Slip gages are made in sets and consist of a number of hardened blocks.
(II) Slip gages are precision measuring instrument for checking and setting of angles.
(III) Slip gages are used as standard for precision length measurement.
(IV) Slip gages is a tool used for marking purpose only.
Answer
A. Only (I) and (III)
66
Which is the correct order in the stages of Heat treatment?
(I) Heating
(II) Quenching
(III) Soaking
Answer
B. (I), (III), (II)
67
Which of the following statement is correct about the purpose of Gears?
(I) To change the velocity ratio
(II) To change the direction of rotation
(III) To get a positive drive
(IV) Used to transmit torque or motion from the driving shaft to the driven shaft
Answer
D. All of the above
68
Which file is not under the category of special files?
(I) Riffer file
(II) Barrette file
(III) Knife edge file
(IV) Mil saw file
Answer
D. Only (III)
A 13 146/2023
69
Which one of the following is the correct statement for Dog clutch?
(I) Engaged progressively whilst one or both of the elements are rotating
(II) Widely used in machine tools to connect the transmission gear box to the driving motor.
(III) Joints the shaft and the gear
(IV) Provide a positive drive but can only be engaged when two elements of the clutch are
stationary.
Answer
C. Only (IV)
70
In a hypoid gear, which statement is true?
(I) Used in automatic differential gear boxes.
(II) Used for speed reduction purposes.
(III) Change rotary into linear movement and vice versa.
(IV) The tooth action between each gear is a combination of rolling and sliding action along
a straight line.
Answer
B. (I) and (IV)
71
A lock washer is used to prevent :
(I) Bolt or nut from loosening under vibration
(II) Used to distribute the clamping pressure
Answer
A. Only (I)
72
Which statement is incorrect about uses of Bearing?
(I) Support and hold the shaft in a fixed position.
(II) Allow the shaft to run freely
(III) To connect or disconnect the various mechanism to the power source.
(IV) Restrain moving elements
Answer
C. Only (III)
73
Which of the following statement is correct for Galvanizing?
(I) Mild steel is coated with zinc.
(II) Medium carbon steel is coated with zinc.
(III) High speed steel is coated with zinc.
(IV) Cast iron is coated with zinc
Answer
D. (I)
74
Which one of the following purpose is not true about a Lubricant?
(I) Reduce friction
(II) Prevents wear
(III) Prevents adhesion
(IV) Can absorb shocks
Answer
B. Only (IV)
75
Which of the following statement is correct about Lapping?
(I) Improves geometrical accuracy
(II) Refines surface finish
(III) Improve the quality of fit between the mating components.
(IV) To relive the internal stresses
Answer
C. Only (I), (II) and (III)
76
How many electrons are there in the third shell of the Aluminium atom?
Answer
B. 3
77
Two resistors when connected in series give the total resistance 4 Ω and when connected in
parallel the total resistance become 1 Ω, what are the values of each resistors?
Answer
B. 2 Ω and 2 Ω
78
Which of the following effect of electric current is used in electric bell?
Answer
C. Magnetic effect
79
What is the formula for quantity of electricity (Q)?
Answer
D. Current × time
80
Which of the following is the example of semiconductor?
Answer
D. Germanium
81
What is the unit of conductance?
Answer
B. Mho
82
If –––––––––––– electrons passes through a conductor per second having 1 Ω resistance with
a potential difference of 1 V causes 1 A current.
Answer
C. 6.24 × 1018
83
What is the indication of neon polarity indicator used for checking DC supply?
Answer
B. Only one electrode will glow
84
Which law states that in a closed electric circuit the applied voltage is equal to the sum of the
voltage drops?
Answer
C. Kirchhoff’s second law
85
What is the change of resistance value of the conductors as it’s diameter is doubled?
Answer
C. Decreases to four times
86
Which method is used for measuring 1 Ω to 100 K Ω range resistance?
Answer
B. Wheatstone bridge method
87
Calculate the total power of the circuit having two lamps rated as 200 W / 240 V are
connected in series across 240 V supply?
Answer
A. 100 W
88
An ammeter in a short circuit indicates :
Answer
B. Maximum value
89
In Sensistors
Answer
A. As temperature increases, resistance increases
90
Which type of ohm meter is particularly suitable for measuring low value of resistance?
Answer
A. Shunt type ohm meter
91
Which material is having negative temperature co-efficient property?
Answer
C. Silicon
92
Which electrical quantities are related in Ohm’s law?
Answer
D. Current, Voltage and Resistance
A 17 146/2023
93
Which energy source is used for non conventional power generation?
Answer
C. Wind
94
Which type of turbine is suitable for high head hydro electric power plant?
Answer
B. Impulse turbine
95
Which device in a steam power plant is used to heats the feed water on its way to boiler?
Answer
D. Economiser
96
Which is the shape of mandatory sign symbol?
Answer
B. Circular
97
Which one is an example for class C fire?
Answer
C. Fire on liquified gas
98
What is the use of pincer?
Answer
B. Extracting nails from the wood
99
What is the angle of the tip of a centre punch?
Answer
D. 90°
100
Which device controls the sequence of operations in sequential control system?
Answer
A. Timer
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