| Post Name | Pump Operator |
|---|---|
| Department | Universities in Kerala |
| Question Paper Code | 019/2023 |
| Category Code | 557/2021 |
| Date of Test | 2 March 2023 |
| Medium of Question | ENGLISH |
| Exam Type | OMR Examination |
| Total Questions | 100 |
1
How to exhibit the mandatory signs ?
Answer
A. White symbol on blue background
2
Which one is not suitable for lifting heavy load ?
Answer
D. Crowbar
3
Sickness is a _______ type of hazard.
Answer
C. Physiological
4
In ‘ABC’ of first aid, ‘A’ stands for
Answer
B. Airway
5
Which among the following is not a drill holding device ?
Answer
C. Arbor
6
One volume of liquid acetone can dissolve ________ volume of acetylene gas under
normal atmospheric temperature and pressure.
Answer
A. 25
7
Bifurcated rivet is used
Answer
D. For fastening tin plates
8
Bottoming taps contain _____ rings on shank and the end of taps are champhered
at an angle of _______ degree.
Answer
C. 3 rings and 20 degree
9
Jenny caliper is also known as
i) Hermaphrodite
ii) leg and point caliper
iii) Odd leg caliper
Answer
B. All of the above (i, ii and iii)
10
Which statement is suitable for smooth file ?
Answer
D. Remove small quantity of metal and give a good finish
11
In the case of a cold chisel, the angle between the top face of the cutting point, and
normal to the work surface at the cutting edge is called
Answer
A. Rake angle
12
The accuracy of try square is
Answer
D. 0.002 mm per 10 mm length
13
Nine main-scale divisions of a vernier caliper are divided into ten equal parts on the vernier scale. Find 1 VSD. (Consider 1 MSD = 1 mm.)
Answer
C. 0.9 mm
14
The datum line of an outside micrometer is stamped on
Answer
A. Barrel
15
Which among the following statement is not true ?
Answer
B. Hole of standard wire gauge is used for checking wire diameter
16
Types of dial test indicators are
i) Plunger type dial test indicator
ii) lever type dial test indicator
iii) Washer type dial test indicator
Which among the following is correct ?
Answer
D. Only i and ii
17
The forward voltage, at which the current through the PN junction starts increasing
rapidly is known as
i) Cut off voltage
ii) Knee voltage
iii) Peak reverse voltage
iv) Cut in voltage
Answer
B. Only ii and iv
18
Which of the following is/are Pentavalent impurities ?
i) Antimony
ii) Boron
iii) Bismuth
Answer
A. Only i and iii
19
Which of the following is/are the application of Zener diode ?
i) Amplifier
ii) Peak clipper
iii) Voltage regulator
iv) Full wave rectifier
Answer
D. Only ii and iii
20
Parameters which determine the performance of a JFET is/are
i) AC drain resistance
ii) Knee voltage
iii) Transconductance
Answer
B. Only i and iii
21
In a linear resistor
i) Resistant value is constant
ii) V and I are directly proportional
iii) V and I are inversely proportional
iv) Resistance value not constant
Answer
C. Only i and ii
22
According to the Ohm’s law which of the statement is/are correct ?
i) I = V/R
ii) V = IR
iii) I = R/V
iv) R = VI
Answer
A. Only i and ii
23
Current flowing through an open circuit is
i) Very high
ii) High
iii) No current flow
iv) Infinity
Answer
B. Only iii
24
Function of yoke is/are
i) It provides mechanical support for the poles
ii) It carries the magnetic flux produced by the poles
iii) It carries electrical supply
iv) It provides over all protection of machine
Answer
C. Only i, ii and iv
25
Commutator used in a dC generator is/are
i) to facilitate collection of current from the armature conductor
ii) to carrying field winding
iii) convert AC induced in the armature conductors into unidirectional current
Answer
A. Only i and iii
26
Self excited DC generators are classified into
i) Shunt wound
ii) Series wound
iii) Compound wound
Answer
D. All the above (i, ii and iii)
27
Iron losses in a dC generator is/are
i) Hysteresis losses
ii) Windage losses
iii) Eddy current losses
iv) All the above (i, ii and iii)
Answer
B. Only i and iii
28
Which of the following starter is/are used to control a dC motor ?
i) dOl starter
ii) Star delta starter
iii) 3-Point starter
iv) 4-Point starter
Answer
D. Only iii and iv
29
The rotation of dC motor can be reversed by
i) Reversing both the field current and armature current
ii) Reversing field current or armature current
iii) Increasing field current
Answer
A. Only ii
30
The working principle of a transformer is based on the
i) Faraday’s law of electromagnetic induction
ii) Thumb rule
iii) Fleming’s right hand rule
iv) Fleming’s left hand rule
Answer
B. Only i
31
A current carrying conductor placed in a magnetic field, it experiences a torque, this
principle is related to
i) Working of a generator
ii) Working of a motor
iii) Working of a transformer
Answer
C. Only ii
32
Percentage of slip in an induction motor is
(Ns − N)
i) × 100
Ns
(N − Ns)
ii) × 100
Ns
(N − Ns)
iii) × 100
N
Answer
A. Only i
33
Which of the following materials have small electrical resistivity ?
i) Bakelite ii) Aluminum
iii) Quartz iv) Copper
Answer
C. Only ii and iv
34
Which of the following materials come into the group of semiconductors ?
i) Gold
ii) Silver
iii) Copper
iv) Silicon
Answer
D. Only iv
35
For the normal operation of a transistor
i) Emitter – Base junction is forward biased and Collector – Base junction is
reverse biased
ii) Emitter – Base junction is reverse biased and Collector – Base junction is
forward biased
iii) Emitter – Base junction and Collector – Base junction are forward biased
Answer
A. Only i
36
An ideal transformer which has
i) No losses
ii) Winding losses
iii) Copper losses and Core losses
Answer
B. Only i
37
main advantages of FET over BJT is/are
i) High input impedance
ii) less noise level
iii) low input impedance
iv) Considerable noise level
Answer
D. Only i and ii
38
BJT is a
i) Voltage control device
ii) Power controlled device
iii) Current controlled device
Answer
C. Only iii
39
most commonly methods used for fabrication of transistor is/are
i) Point contact
ii) Alloy junction
iii) Grown junction
Answer
D. All the above (i, ii and iii)
40
Which of the following is/are the terminals of a mOSFET ?
i) Source, drain, Gate
ii) Collector, Emitter, Gate
iii) Source, drain, Base
iv) Collector, Emitter, Base
Answer
A. Only i
41
Which of the following is/are come into the thyristor family ?
i) BJT
ii) diode
iii) SCR
iv) FET
Answer
B. Only iii
42
Which switching device is/are known as double base diode ?
i) Transistor ii) FET
iii) SCR iv) UJT
Answer
C. Only iv
43
Which of the following is/are an example of primary cell ?
i) Nickel-Cadmium cell
ii) dry cell
iii) lead acid cell
iv) mercury cell
Answer
B. Only ii and iv
44
Capacitance of a capacitor depends upon
i) Area of plate
ii) distance between the plates
iii) Types of dielectric
Answer
D. All the above (i, ii and iii)
45
The colour code for resistor 47 kΩ 5% tolerance is
i) Yellow, Violet, Red, Gold
ii) Yellow, Violet, Orange, Silver
iii) Yellow, Violet, Orange, Gold
iv) Yellow, Violet, Red, Silver
Answer
C. Only iii
46
When two capacitors are connected in parallel total capacitance is
i) decreased
ii) Equal to the capacitance of one capacitor
iii) Equal to the sum of the individual capacitor
iv) Product of two capacitor
Answer
A. Only iii
47
SI unit of viscosity is
Answer
C. Pa.s
48
Which part cleans compressed air by trapping solid particles and isolating liquids in
the compressed air ?
Answer
B. Filter
49
Pascal’s law states that the pressure or intensity of pressure at a point in a static
fluid is ______ in all directions.
Answer
C. Equal
50
Which part of double acting cylinder stops air leakage from cylinder to atmosphere ?
Answer
C. Rod seal
51
Which valve block flow of liquid in one direction and permit free flow in the other
direction ?
Answer
A. Non-return valve
52
Which pump is functioning similar to the external gear pump except that unlike gears
do not directly make contact with each other ?
Answer
B. Lobe pump
53
Hydraulic actuator convert the pressure energy of fluid into _______ output to perform
useful work.
Answer
D. mechanical
54
Directional control valve are classified according to the
Answer
B. Number of ports and position
55
A hydraulic pump converts _________ into hydraulic energy.
Answer
D. mechanical energy
56
What is the use of directional control valve in hydraulic system ?
Answer
A. Open or close flow path
57
What is the working cycle of compression ignition engine ?
Answer
B. diesel cycle
58
Which is the reason to decrease the volumetric efficiency of an engine ?
Answer
C. Excessive back pressure
59
The cross-sectional area of one cylinder of an engine multiplied by its stroke is
called
Answer
D. Swept volume
60
When does a fresh charge escapes from the petrol engine exhaust ?
Answer
A. during valve overlap
61
A ‘square engine’ is an engine having
Answer
B. Bore and stroke equal
62
Which is used to determine the stroke of an engine ?
Answer
B. Throw
63
The portion below the piston pin boss is called
Answer
B. Skirt of the piston
64
The minor diameter of a camground piston is
Answer
A. along piston pin axis
65
A crankshaft is made off
Answer
C. Forged and heat treated alloy steel
66
What is ovality of a bore ?
Answer
B. difference in dia thrust to non thrust side of cylinder
67
Exhaust valve face angle is generally
Answer
D. 45 degree
68
What type of bearing fitted in the connecting rod big end ?
Answer
D. Shell bearing
69
Exhaust valves are opened at a definite degree before BDC in engine valve
timing. This is called
Answer
A. lead
70
Scavenging is done for the following purpose
Answer
B. Power output
71
What is the effect if thermostat valve is stuck in closed position ?
Answer
B. Engine gets over heating
72
The boiling temperature of the coolant in the cooling system is increased by the
use of
Answer
C. Pressure relief valve and vacuum valve
73
Percentage of fuel energy lost to the cylinder walls in an automobile engine is
approximately
Answer
B. 25 per cent
74
In which types of cooling system the rate of cooling is very low ?
Answer
A. Thermo siphon system
75
Engine overheating may result due to
Answer
D. Broken fan belt
76
What is the cause of water leakage in water pump ?
Answer
C. Worn out seal
77
What is the reason if oil pump does not suck the oil ?
Answer
C. more backlash
78
The friction that occurs between the layers of oil in an oil film is called
Answer
B. Viscous friction
79
High oil pressure in a lubrication system is caused due to
Answer
A. Incorrect adjustment of relief valve
80
Which part is lubricated by splash lubrication system ?
Answer
Question Cancelled
81
Which type of the emission control system that blow by gases are feed into the
inlet manifold of a running engine ?
Answer
C. Positive crank case ventilation
82
Excessive oil consumption may be caused by all of these problems except
Answer
A. Worn rocker arms
83
In a diesel fuel injection pump, the effective pressure strokes of the plungers are
regulated by means of a
Answer
D. Control rack
84
Which action the spindle only move up and down in feed pump ?
Answer
B. Idling action
85
Cetane number of a diesel fuel is measure of
Answer
C. Ignition quality
86
Which governor has fitted the control rack with diaphragm ?
Answer
B. Pneumatic governor
87
The combustion process in a diesel cycle happens at
Answer
A. Constant pressure
88
What is the purpose of baffles in the fuel tank ?
Answer
D. To minimize the slushing of fuel in the tank
89
Which meter indicates the distance travelled by a vehicle ?
Answer
C. Odometer
90
Limp In mode is in
Answer
B. Engine check light
91
What is the function of solenoid switch in starting system ?
Answer
C. Close the contact between battery and starting motor
92
Which type of sensor used to monitor the injection timing and ignition timing of engine ?
Answer
A. Crank and cam shaft position sensor
93
In an alternator the magnetic field is produced in the
Answer
D. Rotor
94
Which gas is filled in the sealed beam head lights ?
Answer
C. Argon gas
95
Which sensor is used for monitoring the air-fuel ratio ?
Answer
A. Exhaust gas oxygen sensor
96
The vertical distance between the centre line of the centrifugal pump and the liquid
surface in the pump is called as
Answer
D. Suction head
97
A centrifugal pump acts as a reverse of
Answer
C. Inward radial flow reaction turbine
98
The fluid coming in the centrifugal pump is accelerating with the help of
Answer
B. Impeller
99
Which one of the following parts act as a flame arrester during engine back fire ?
Answer
C. Air filter
100
Which type of muffler produces anti noise without restricting exhaust flow ?
Answer
B. Electronic type
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