| Post Name | VOCATIONAL INSTRUCTOR IN MECHANICAL SERVICING - AGRO MACHINERY |
|---|---|
| Department | KVHSE |
| Question Paper Code | 077/2016 |
| Date of Test | 8 June 2016 |
| Medium of Question | ENGLISH |
| Exam Type | OMR Examination |
| Total Questions | 100 |
1
The ratio of mass to volume is known as :
Answer
B. Density
2
Density of mereury is 13.6 g/ce and density of water is 1 gr/ec, then specific gravity of
mercury is :
Answer
C. 13.6
3
The pressure acting at the bottom of a 1 m deep tank having fresh water with density
1000 kg/m3:
Answer
D. 9810 Pa
4
The spherical shape of droplets of Mercury is due to :
Answer
A. High surface tension
5
The capillary rise or dipression in a small diameter tube is :
Answer
Question Cancelled
6
Gauge pressure in flow systems are measured by :
Answer
Question Cancelled
7
Standard atmospheric pressure in terms of water column is :
Answer
D. 10.33 m
8
The velocity head representing the kinetic energy per unit weight of fluid is denoted by :
a
Answer
B. —
9
A Pitot tube is an instrument for measuring :
Answer
C. Velocity of flow
10
Venturi meter is a device used for measuring :
Answer
A. Flow rate
11
The laminar flow is characterized by :
Answer
B. Fluid particles moving in layers parellal to the boundary surface
12
The essential feature of turbulent flow :
Answer
D. Velocity and pressure at a point exhibits irregular fluctuations of high frequency
13
The energy loss in a pipe line is due to:
Answer
C. Friction offered by pipe wall as well as by the viscous action
14
Head loss due to sudden expansion is given by :
Answer
A. (v₁ − v₂)²/(2g)
15
The coefficient of discharge C_d in terms of C_v and C_c :
Answer
B. C_d = C_v × C_c
16
The discharge through a rectangular notch is given by :
Answer
D. Q = (2/3) C_d √(2g) L H^(3/2)
17
The loss of pressure head for laminar flow through pipe varies :
Answer
B. Directly as the velocity
18
Stoke is the unit of :
Answer
C. Kinematic viscosity
19
Gauge pressure at a point is equal to :
Answer
A. Absolute pressure minus atmospheric pressure
20
Bernoulli's theorem deals with the law of conservation of:
Answer
D. Energy
21
The unit of frequency of an alternating quantity :
Answer
B. Hertz
22
rms value of symmetrical sinusoidal current is :
Answer
A. 0.707 max : value
23
The power factor of an R-L series circuit is :
Answer
B. Between 0 and 1
24
The power taken by a 3¢ load is given by:
Answer
D. V3V,1, cos ¢
25
The function of a commutator in a d.c, generator is to:
Answer
A. Convert induced a.c. into d.c.
26
The best suited motor for cranes and hoists ;
Answer
C. de. series motor
27
During charging of lead acid cell :
Answer
B. Its voltage increases
28
The ratio of Ah efficiency to Wh efficiency of lead acid cell is :
Answer
D. Always greater than 1
29
The capacity of a cell is measured in :
Answer
C. Ampere hour
30
The sulphation in a lead acid battery occurs due to:
Answer
Question Cancelled
31
The working cycle of a petrol engine :
Answer
A. Otto cycle
32
Which engine is suitable for heavy load?
Answer
A. Diesel engine
33
How many number of working stroke per minute will take place for a 1600 rpm single
cylinder 4 stroke engine?
Answer
D. 800
34
Cooling system used for two stroke petrol engine :
Answer
B. Air cooled
35
The function of carburettor in petrol engine :
Answer
C. To mix air and petrol into correct proportion
36
The brake power is 7.5 kw and frictional power is 2.5 kw, then the indicated power is :
Answer
D. 10 kw
37
The Heat addition process in a diesel engine takes place at :
Answer
A. Constant pressure
38
1൩൭൪ stroke, each cylinder has :
Answer
C. Two valve
39
The component that atomise fuel into fine spray to cylinder :
Answer
D. Injection nozzle
40
Stoichio metric air fuel ratio :
Answer
B. 15:1
41
When pressing the clutch pedal?
Answer
C. Pressure plate moves away from fly wheel
42
The device which permits the vehicle reverse direction :
Answer
B. Gear box
43
Which type of rear axle is used for heavy commercial vehicle?
Answer
D. Full floating
44
In air brake system air compressor is driven by :
Answer
A. Engine itself
45
The principle used for making hydraulic brakes :
Answer
D. Pascals’ Law
46
One tonne of refrigeration is equal to :
Answer
B. 210 KJ/min
47
C.O.P is always ——————— one.
Answer
Question Cancelled
48
Ina refrigerating machine, heat rejected 15 --- heat absorbed.
Answer
A. Greater than
49
Heat is rejected by the refrigerant in ——————— during refrigerating cycle.
Answer
C. Condenser
50
Commonly used refrigerant in a domestic vapour compression refrigerator :
Answer
B. Freon — 12
51
In a vapour compression refrigeration system, the condition for refrigerant before entering
the compressor :
Answer
Question Cancelled
52
The refrigerant commonly used in vapour absorption system is :
Answer
D. Aqua-ammonia
53
Aclectrolux refrigerator is called :
Answer
C. Three fluid absorption system
54
Identify the azeotrope refrigerant from the following ; ,
Answer
D. R502
55
Highly toxic and flammable refrigerant :
Answer
B. Ammonia
56
Environmental protection agencies advice against the use of chloro-fluro carbon refrigerant
because :
Answer
D. These reacts with ozone layer
57
‘The expansion device used in domestic refrigerator :
Answer
A. Capillary tube
58
A electrolux refrigerator is called:
Answer
C. Three fluid absorption system
59
When heat is absorbed by a gas, change in entropy is considered to be :
Answer
A. Positive
60
The COP of a Bell-Coleman cycle refrigerators having same compression ratio and expansion ratio (γₚ = compression ratio = expansion ratio)
Answer
B. 1/[γₚ⁽ʳ⁻¹⁾⁄ʳ − 1]
61
The tail stock set over for a job having D = 35 mm, d = 27 mm, l = 75 mm and L = 225 mm would be equal to:
Answer
C. 12 mm
62
The cutting tool in a milling machine is held in position by : |
Answer
A. Arbor
63
Which of the following operation is required for making a chamfer on the edge of a hole?
Answer
D. Counter sunking
64
Which of the following welding processes used consumable electrode?
Answer
B. MIG welding
65
The heat generated in resistance welding is given by:
Answer
C. H = I²RT
66
The process of joining two pieces in which a nonferrous alloy is introduced in liquid state
between the pieces of metals and allowed to solidity, is known as:
Answer
D. Brazing
67
In MIG welding process, the gas used for welding steel :
Answer
Question Cancelled
68
Oxidising flame is a flame which is obtained by supplying :
Answer
A. Less volume of acetylene and more volume of oxygen
69
The drill spindles are provided with standard taper known as :
Answer
C. Morse taper
70
The cutting tool in a milling machine is having :
Answer
B. Rotational motion
71
The length of belt used in a cross belt drive is —————— than that used in open belt
drive.
Answer
D. Greater
72
Idle gear wheels are used in compound gear train for :
Answer
A. Tochange the direction
73
A machine is said to be self locking if efficiency of machine is :
Answer
D. Less than 50%
74
Maximum efficiency of a screw jack is a function of :
Answer
B. Angle of friction
75
Diametral pitch of a gear wheel is defined as the ratio of :
Answer
A. Number of teeth to pitch circle diameter
76
The smallest circle drawn to the cam profile from the cam centre is known as:
Answer
C. Base circle
77
Incam and follower, the period of dwell is the period :
Answer
B. During which the follower remains stationary during some finite rotation of cam
78
In the case of pivot bearing, the rubbing velocity is :
Answer
A. Zero at centre and maximum at the outer radius
79
The frictional torque transmitted in the case of flat pivot bearing for uniform pressure is
| equal to:
|
Answer
D. aH WR
80
The maximum efficiency of a Screw jack is given by (p-angle of friction) :
Answer
C. 1-ainф
81
If T₁ and T₂ are the tensions on the tight side and slack side of belt drive and θ is the angle of conduct, then the ratio of tension is given by:
Answer
B. T₁/T₂ = eᵘᶿ
82
The torque required to produce a twist of 1 radian per unit length of shaft is known as:
Answer
D. Torsional rigidity
83
The cross section of most commonly used key is :
Answer
Question Cancelled
84
Which one of the following coupling is used to connect two shafts when the shafts are having
relative speed?
Answer
C. Fluid coupling
85
Two shafts, one solid and other hollow, are made of same material and are having same
length and weight. The hollow shaft as compared to solid shaft will be :
Answer
B. More strong
86
Specific speed of a pump is the speed at which a pump runs when :
Answer
A. Head developed is unity and discharge is one cubic metre
87
The discharge through a single acting reciprocating pump when pump rotates at N rpm:
Answer
Question Cancelled
88
The position of filter in a hydraulic system is in between :
Answer
D. Reservoir and pump
89
The valve which route the fluid to the desired direction is called :
Answer
C. Directional control valve
90
The device that convert hydraulic into mechanical energy :
Answer
D. Actuator
91
Which of the following valve controls the flow rate in hydraulic system?
Answer
B. Gate valve
92
Which of the following is a static seal?
Answer
D. O-ring
93
The function of an intensifier is to: |
Answer
A. Increase the pressure above the pump discharge pressure
94
The device that store potential energy of incompressible fluid is called :
Answer
B. Accumulator
95
The component that condense and remove the water vapour in air in a pneumatic system is :
Answer
A. Air filter
96
The drive used to convert hydraulic energy to rotating mechanical energy is called :
Answer
C. Hydraulic motor
97
An example for axial positive displacement pump (linear type) :
Answer
D. Swash plate piston pump
98
Control valve which operates with electric current :
Answer
B. Solenoid valve
99
Ina pneumatic circuit, the component which form a mist of oil and air :
Answer
D. Air lubricator
100
An example for air motor :
Answer
C. Gerotor
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