| Post Name | Instrument Mechanic - Medical Education |
|---|---|
| Question Paper Code | 158/2023/OL |
| Category Code | 050/2022, 075/2022 |
| Date of Test | 6 November 2023 |
| Exam Type | Online Examination |
| Total Questions | 100 |
1
Which gauge is used to check the accuracy of an external thread?
Answer
B. Thread ring gauge
2
Which electrical quantity affects the heat generated in a conductor?
Answer
C. Square of the current
3
In the slip gauge grades _________ is a calibration grade used as a standard for reference to test all the other grades.
Answer
D. Grade '00'
4
The most accurate instrument used to set and check angles is ________
Answer
D. Sine bar
5
Which method of the soldering is used for quantity production and for tinning work?
Answer
A. Dip soldering
6
_________ is used to measure the size of a wire and thickness of sheet.
Answer
A. Standard wire gauge
7
_________ Gauges have both 'Go' and 'No Go' ends are provided at the same end.
Answer
B. Progressive plug gauge
8
_________ are gauge blocks used as standards for precision length measurement.
Answer
C. Slip gauge
9
What is the effect of electric current on neon lamp?
Answer
D. Gas ionization effect
10
Which type of resistor is used for arc quenching protection in circuit breakers?
Answer
A. Varistors
11
What is the shape of voltage wave form generated by a coil rotating in a uniform magnetic field?
Answer
A. Sine wave
12
The time required to produce one complete cycle is called?
Answer
D. Period of the wave form
13
How inductance of a coil is decreased?
Answer
C. By increasing spacing between the turns
14
What is the capacitance of a capacitor that requires 0.5 coulomb to charge it to 50 volts?
Answer
B. 0.01 F
15
In RLC series circuit, at which condition the current through the circuit is maximum?
Answer
C. Xₗ = Xᴄ
16
At what condition the RLC parallel circuit behaves as capacitive circuits?
Answer
A. Frequency is higher than resonance frequency
17
If the maximum value of dynamically induced emf produced in a conductor a DC generator is 100V, then what will be the value of induced emf when the conductor cuts the magnetic field at 30°?
Answer
A. 50 Volts
18
What is the formula used to calculate the back emf of a DC motor?
Answer
B. Eᵇ = V − IₐRₐ
19
Which single phase A.C motor is classified under commutator type motor?
Answer
B. Repulsion motor
20
A 3 phase 415 V, 60 Hz, 6 pole induction motor is running at 960 RPM. Calculate the rotor frequency?
Answer
D. 12 Hz
21
A 2000/200 volt, 20 kVA, 50 Hz single phase transformer has 66 turns in secondary winding and 660 turns in primary winding. Calculate the primary current.
Answer
C. 10 A
22
What is the purpose of providing explosion vent in power transformer?
Answer
D. Pressure releasing
23
A wound type current transformer has 2 turns in primary and carry rated current of 100 ampere. What should be the no. of turns in secondary winding to circular a current of 5 ampere?
Answer
A. 40 turns
24
A 10 kVA, 2500/250 volt, 50 Hz transformer has the short circuit test power input of 256 watts and open circuit test power input of 225 watts. Calculate the load at which maximum efficiency occurs if the load power factor is 0.8 lagging?
Answer
B. 7.5 kVA
25
At which position, the instrument is to be used which is provided with gravity control?
Answer
D. Vertical position
26
If 1 mA current through a measuring instrument causes a full scale deflection of 1 volt. Then calculate the sensitivity of the instrument.
Answer
C. 1000 ohm/volt
27
A 1 mA moving coil ammeter has a resistance of 27 Ω. Calculate the value of shunt resistance to be connected to extend its range to 10 mA ammeter?
Answer
B. 3 ohm
28
Why the pointer of an insulation resistance tester is not coming back to initial position after the measurement is made?
Answer
C. It does not have a controlling torque
29
Which instrument has a uniform scale?
Answer
D. Dynamometer type wattmeter
30
In the scale of a series type ohmmeter, on which zero reading is marked?
Answer
A. On right side of scale
31
Semiconductors have properties : I. Resistivity less than insulator and more than a conductor. II. Positive temperature co-efficient of resistance. III. Conduction property can be changed by adding impurity.
Answer
D. I and III are correct
32
Which statement/s is/are true for Transistors? I. Emitter supplies charge carriers. II. Emitter is always forward biased w.r.t Base so that it can supply large number of majority carriers. III. Collector is smaller than other two regions IV. Transistor transfers input signal current from a low-resistance circuit to high- resistance circuit.
Answer
B. I, II and IV are true
33
Select the false statement for a basic Zener voltage regulator:
Answer
C. Irrespective of the changes in input voltage, current through Zener remains same
34
In an oscillator tank circuit, frequency of oscillation is:
Answer
B. inversely proportional to L and C
35
For an RC phase shift oscillator circuit having three RC network sections, each section produces a phase shift of :
Answer
A. 60°
36
2's complement of binary "1000" is
Answer
B. 1000
37
According to De Morgan's theorem. I. NAND gate is equivalent to Bubbled OR gate II. NOR gate is equivalent to Bubbled AND gate. III. NAND gate can be used as Inverter if both inputs are shorted.
Answer
A. All are correct
38
Both the SUM and CARRY output for a full adder is 1 when :
Answer
D. A = 1, B = 1, C =1
39
Shifting in JK Flip-Flop is as follows : I. To shift a 0 in to the flip-flop, J = 0 and K = 0 II. To shift a 1 in to the flip-flop J = 1 and K = 0 III. To toggle between 0 and 1, J= 1 and K =1
Answer
D. Only II and III are True
40
DAC technique/s is/are
Answer
D. Both (2) and (3)
41
Hex inverter IC is
Answer
B. 7404
42
A multiplexer of 4 control line having:
Answer
C. 16 data inputs and 1 output
43
Electron Gun assembly in CRT consists of :
Answer
D. Both (1) and (2)
44
Measurement which cannot be done with an Oscilloscope is
Answer
B. Current through the circuit
45
In 8085 Flag Register, which bit position deal with carry flag?
Answer
A. D0
46
The circuit in SMPS which adjust the duty cycle of the main switching transistors:
Answer
B. PWM controller
47
Function in Inverters are I. Converts AC mains supply into DC and stores DC power in the battery. II. When AC mains present, the input AC power is directly passes to output load through changeover relay. III. DC power stored in the battery is converted into AC by the use of electronic circuits.
Answer
D. All three are True
48
The calculation of rejection by the Op-Amp of unwanted input signals common to both input leads is called :
Answer
A. CMRR
49
Ideal Op-Amp will have the following characteristics I. Voltage gain Av = 1 II. Bandwidth BW = ∞ III. Input resistance Rin = ∞
Answer
B. Only II and III are True
50
The reference voltages at Threshold and Trigger comparators of 555 timer respectively are:
Answer
A. 2/3 Vcc and 1/3 Vcc
51
In measurement system, which of the following are undesirable static characteristics:
Answer
C. Drift, Static error and dead zone
52
Precision is the
Answer
A. Degree of exactness
53
What is the name of instrument used to detect and record earthquake?
Answer
A. Seismograph
54
LVDT windings are wound on
Answer
C. Soft iron
55
The polarity of DC tachometer output indicates
Answer
B. direction of rotation
56
Which of the following conversion take place in bourdon tubes?
Answer
A. Pressure to displacement
57
In McLeod gauge,
Answer
D. Low pressure fluid is compressed to a high pressure which is read by the monometer technique
58
Absolute pressure is equal to
Answer
A. Atmospheric pressure + Gauge pressure
59
The accuracy of dead weight tester is affected by I. Friction force between the piston and cylinder. II. Uncertainity of the value of affective area of the piston. III. Uncertainity of the value of gravitational constant.
Answer
C. I, II and III
60
What is the purpose of filling glycerin in gauge?
Answer
B. Reduce vibrations
61
Choose the correct statement(s) regarding Ultrasonic flow meters. I. They offer no obstruction to the flow II. There are no moving parts III. They can be used for bidirectional flow
Answer
D. I, II and III
62
Which is the positive displacement flow meter?
Answer
C. Nutating disc meter
63
Reynolds number
Answer
D. All of the above
64
The volume of fluid that is passing through a given cross sectional area per unit time is
Answer
A. volumetric flow rate
65
Rotameter is a
Answer
B. variable area flow meter
66
The primary conversion takes place in float type level indicator is
Answer
C. Level to displacement
67
Which of the following is direct method of level measurement?
Answer
A. Sight glass system
68
Which of the following instruments is used to measure flow on the application of Bernoulli's equation?
Answer
D. All of the above
69
Which one of the following measures the flow in open channels?
Answer
A. Weirs
70
Which system works with sound waves for measuring liquid level?
Answer
B. Ultrasonic level detector
71
On the Kelvin temperature scale, the steam point is
Answer
B. 373.15°K
72
In a Bimetallic thermometer, the material of the thermal well may be
Answer
D. All of the above
73
In a liquid-in-metal thermometer, the bourdon tube, the bulb and capillary tube are completely filled with mercury, usually at a _____________ pressure.
Answer
B. higher
74
RTD is used to determine the temperature by measuring the ___________ of a electrical wire.
Answer
B. Resistance
75
ISA type designation of chromel - Alumel thermocouple
Answer
C. K
76
Optical pyrometer measures the temperature range in between
Answer
A. 600° to 3000°C
77
Thermistors are
Answer
B. Semi conductors
78
___________ valves are not suitable for throttling volume.
Answer
D. Gate
79
In a _____________ increase in the pneumatic pressure applied to the diaphragm lifts the valve stem.
Answer
B. Reverse acting Actuator
80
____________ switch is one detecting the closeness of some object.
Answer
C. Proximity
81
The standard electrical signal in intrumentation
Answer
C. 4-20 mA
82
___________ is to correct the error between the controlled output and its desired value corresponding to the reference value.
Answer
B. Feed back control
83
In ____________ control system use's a secondary controller.
Answer
D. Cascade
84
Offset in the proportional controller can be eliminated by using along with
Answer
B. Integral Control action
85
____________ control system is typically used in the Industrial applications.
Answer
C. Ratio
86
Programmable logic controllers performs the functions
Answer
D. All of the above
87
In HART protocol _________ standard to super impose the digital communication.
Answer
A. Bell 202 FSK
88
HART stands for
Answer
B. High way Addressable Remote Transducer
89
_______________ is an input device of PLC.
Answer
C. Pushbutton
90
In ladder logic, the given symbol is used to indicate
Answer
B. Heating element
91
____________ cable has greater transmission capacity.
Answer
C. Fiber optic
92
LAN is useful for small distance communication
Answer
B. Upto 5 kms
93
In which network topology has a central node connected to each node?
Answer
C. Star
94
______________ is a German standard.
Answer
B. PROFI Bus
95
PWM is also called
Answer
C. Pulse Duration Modulation
96
In DCS, sensors are in the _____________ level.
Answer
A. Zero
97
____________ do not collect and record information or connect to the databases.
Answer
B. HMI
98
_________instrument used to measure hydrogen ion activity in solutions.
Answer
D. pH meter
99
The types of control typically needed by the batch process is
Answer
B. Sequential
100
A technical office protocol was defined by
Answer
B. Boeing
Discussion
Ask a doubt or share a tip.
No comments yet — start the discussion.