| Post Name | TRADESMAN (Diesel Mechanic) - TECHNICAL EDUCATION |
|---|---|
| Question Paper Code | 074/2023 |
| Category Code | 761/2021 |
| Date of Test | 16 June 2023 |
| Medium of Question | ENGLISH |
| Exam Type | OMR Examination |
| Total Questions | 100 |
1
Square head in a combination set has one measuring face at 90 degree and another
at ________ degree to the rule.
Answer
D. 45
2
Which among the following statement is/are correct about Centre Punch ?
i. The angle of point is 60 degree.
ii. The angle of point is 90 degree.
iii. This punch is used for locating centre of the holes.
iv. The divider point will get a proper seating in the punch.
Answer
A. Only ii and iii
3
Rivets are made of ductile material like low carbon steel, brass, aluminium and
their alloys.
Answer
C. Only 1 and 3
4
Name the tool which is used to remove socket from the spindle of drilling machine.
Answer
B. drift
5
Which among the following tool is used for reconditioning of the damaged threads ?
Answer
A. die nut
6
A single level double groove ‘V’ block have
Answer
B. One ‘V’ groove and two slots
7
Which type of angle plate have ‘T’ slots ?
Answer
D. Box angle plate
8
Beam compass is also known as
Answer
C. Trammel
9
Curved cut files are available only in
Answer
B. Flat shapes
10
The chisel which is used for separating metals after chain drilling
Answer
A. Web chisel
11
Which part of the inside micrometer consist sleeve and thimble ?
Answer
A. micrometer head
12
A dial test indicator is a __________ measuring instrument.
Answer
C. Precision and indirect
13
Frame of outside micrometer is made of
i. malleable cast iron.
ii. drop-forged steel.
iii. Aluminium.
iv. low carbon steel.
Answer
D. None of the above
14
Which type of slip gauges are used for inspection purpose ?
Answer
C. Grade ‘0’ accuracy
15
Which among the following is an indirect angular measuring instrument ?
Answer
B. Bevel gauge
16
Try squares are specified according to the
Answer
A. length of blade
17
least count of a Vernier bevel protractor is
Answer
B. 2mSd – 1VSd
18
Which micrometer is used to measure the diameter of holes ?
Answer
D. Inside micrometer
19
Which part of a vernier caliper is used to set the vernier slide in any position on the
beam scale ?
Answer
C. Thumb lever
20
Accuracy of a vernier micrometer is
Answer
D. 0.001 mm
21
Which of the following statement is/are correct about rivets ?
1. Riveting is a temporary fastening method.
2. Rivets are specified by their length, material, size and shape of head.
3. Rivets are made of ductile material like low carbon steel, brass, aluminium and
their alloys.
Answer
B. Only 2 and 3
22
Which tool is used for bringing the sheet metal closely together after inserting the
rivets in the hole ?
Answer
C. Rivet set
23
What is the name of operation of closing down the edges of the plates and heads of
the rivets to form a metal to metal joint ?
Answer
C. Caulking
24
What are the important criteria for selecting a flux ?
Answer
B. Working temperature of the solder, soldering process and material to be joined
25
What is the taper ratio of a key way ?
Answer
C. 1 : 100
26
Which type of key is used when very high torque of impact type is to be transmitted
in both directions of rotation ?
Answer
A. Tangential key
27
Which type of screws are used to permit pulleys from slipping on shafts, positioning
and holding collars in place on both shafts and holding shafts in place in assemblies ?
Answer
D. Set screws
28
What is the use of slots provided in the castle nut ?
Answer
D. Provide space for fixing split pin
29
Which type of nut protect the bolt end thread from damages ?
Answer
B. Cap nut
30
Which type of machine screws are used in heavy duty assembly work ?
Answer
A. Hexagonal screw
31
What is the use of the centre screw provided in the die stock ?
Answer
C. To adjust the depth of cut
32
Which property of oil that controls the flow in hydraulic system ?
Answer
D. Viscosity
33
Which type of tap wrench is more useful to work in restricted place and is used with
single hand only ?
Answer
D. T-Handle tap wrench
34
Which device is used for converting pressure energy of compressed air to mechanical
energy in pneumatics ?
Answer
A. Pneumatic actuators
35
What is the taper angle of commonly used intermediate (second) tap ?
Answer
C. 10 degree
36
What is the term used for calling interlocked air bubbles and pockets in the hydraulic
pipe line and components ?
Answer
C. Cavitation
37
Which of the following tap is used to start the thread while taping ?
Answer
A. Taper tap
38
What is the major cause (more than 90%) of failure in a hydraulic system ?
Answer
D. Contamination of hydraulic-fluid
39
Name the tool used for cutting external thread in work piece.
Answer
C. die
40
Which of the following type of filter is more suitable to remove ferrous material from
oil in hydraulic system ?
Answer
B. Magnetic filter
41
What is the formula of calculating blank size for external threading ?
Answer
D. Blank size = Thread size – 0.1 × Pitch of the thread
42
Which of the following valve protect against excessive pressure in hydraulic system ?
Answer
C. Relief valve
43
Which type of tool is used for chasing or reconditioning the damaged threads ?
Answer
D. die nut
44
Name the branch of science under that you study the properties and application of air.
Answer
B. Pneumatic system
45
What is the rake angle of cutting teeth in a normal type machine tap ?
Answer
A. 12 degree
46
What is the volumetric efficiency of a piston type motor ?
Answer
D. 95%
47
Which material is used for making hand taps ?
Answer
A. High speed steel
48
Name the law which states that the pressure exerted on liquid is transmitted equally
in all the directions.
Answer
B. Pascal’s law
49
What is the energy conversion takes place in hydraulic pump ?
Answer
A. mechanical energy to hydraulic energy
50
Which type of tap is used to finish the threads of a blind hole to the correct depth ?
Answer
C. Plug tap
51
major overhauling of marine diesel engine carried out
Answer
A. 6000 hours
52
In which type of cooling system of marine diesel engine Keel cooler is used ?
Answer
B. Indirect cooling
53
The intake and exhaust valves can be arranged various ways in engines. The most
common arrangement is
Answer
D. I – Head
54
Four stroke turbo charged engines having number of cylinder 4 and above will require
exhaust
Answer
D. Grouping
55
Which one of the following method adopted commonly for starting the marine diesel
engine ?
Answer
C. Compressed air
56
Which instrument is used to find the drop of the shaft in relation to its own housing
in static condition ?
Answer
B. Bridge gauge
57
Which type of starting method in marine diesel engines, starting valves are used ?
Answer
A. Air starting
58
For finding the engine torque, which instrument is used ?
Answer
C. dynamo meter
59
In case of air cooled engines cylinder heads are provided with pre-casted integral
parts known as
Answer
C. Fins
60
The test carried out initially on the engine before it is operated for a long period, is
known as
Answer
D. Running trial
61
A periodic variation in the speed of a governed engine due to inertia or friction in the
mechanism is called
Answer
A. Engine hunts
62
The exhaust manifolds are designed to avoid overlapping of exhaust strokes as far
as possible, this keep the back pressure to a
Answer
C. minimum
63
To install the piston in the cylinder, compress the ring in their groove so that they will
enter easily in the cylinder, it is done by
Answer
C. Ring compressor
64
The shell diameter is made slightly greater than the diameter of the connecting rod
Bore is known as
Answer
B. Bearing Spread
65
Use of plastigauge is to check
Answer
D. Oil clearance
66
In petrol injection system, the fuel injector stays open during the intake cycle, this is
known as
Answer
A. Injector pulse width
67
What is the cause of Valve seat recession ?
Answer
D. decrease the clearance
68
Which action would take, when a cylinder wall has become badly scored ?
Answer
A. Regrind the cylinder wall and fit with new piston
69
Sensor senses the information in the form of physical or chemical variables and
sends that information to the ECm in the form of
Answer
D. Voltage
70
The two important properties of the cylinder head gasket are
Answer
A. Tenacity and compressibility
71
A square engine is an engine having
Answer
C. Bore and stroke equal
72
A set of operations performed in sequence by the motion of the piston in an Engine
to produce Power is called
Answer
C. Cycle
73
Who is the inventor of C.I. engine ?
Answer
B. Rudolph diesel
74
The oil pan in an Engine may be made of
Answer
A. Steel or Aluminium
75
The distance between the centre of crankpin to the centre of main journal is called
Answer
D. Throw
76
most high-speed C.I. Engines operates on following cycle
Answer
A. dual combustion cycle
77
The ratio of the weight of the induced charge and the charge needed to completely
fill at atmospheric pressure and normal temperature in the swept volume
Answer
B. Volumetric efficiency
78
Compression ratio of an IC engine refers to
Answer
A. C_R = (V_s + V_c)/V_c
79
What is the speed ratio of Camshaft to Crankshaft ?
Answer
A. Half
80
Which of the following is defined as the escape of burned gases from the combustion
chamber past the pistons in to the crankcase ?
Answer
C. Blow by
81
The negative plate of a lead acid battery is
Answer
D. Pb
82
Kilowatt is the unit of
Answer
B. Power
83
According to Ohm’s law
Answer
A. V = IR
84
Cut out relay is not required for
Answer
B. Alternator
85
The specific gravity of fully charged battery is
Answer
C. 1.280
86
Growler test is conducted on
Answer
A. Starting motor
87
Automotive starting motors are
Answer
D. Both
88
In a D.C. Generator magnetic field is produced in the
Answer
D. Stater
89
In a starter motor the field windings are wound around
Answer
D. Pole shoes
90
What is the energy conversion of battery during discharge ?
Answer
B. Chemical Energy into Electrical Energy
91
Flow of Electron is called
Answer
A. Current
92
For the diesel Engine the type of Governing used is
Answer
A. Quality Governing
93
What is identified the antiknock quality of Diesel Fuel ?
Answer
B. Cetane number
94
The venturi in the carburettor causes the
Answer
A. Increases of Air velocity
95
The example of variable venturi type carburettor is the
Answer
D. Su Carburettor
96
Exhaust valve usually starts opening
Answer
D. Before BdC
97
CRdI means
Answer
D. Common Rail direct Injection
98
Which is a greenhouse effect gas ?
Answer
C. CO2
99
What is the purpose of EGR valve ?
Answer
A. Reduce NOx
100
What is the name of the Governor in which the control rack connected with counter
weight floating lever ?
Answer
A. mechanical Governor
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