MES Jr. Grade • Paper-III
For an ideal cavity ‘Q’ value is
A)
Zero
B)
Infinity
C)
One
D)
Two
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'Zero' (Option A).
MES Jr. Grade • Paper-III
Impedance of the line to the right of voltage minimum is
A)
Inductive
B)
Capacitive
C)
High resistance
D)
Low resistance
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'Inductive' (Option A).
MES Jr. Grade • Paper-III
In an 8085 microprocessor, the instruction CMP B has been executed while the content of the accumulator is less than of register B. As a result
A)
Carry flag will be set but Zero flag will be reset
B)
Carry flag will be reset but Zero flag will be set
C)
Both Carry flag and Zero flag will be reset
D)
Both Carry flag and Zero flag will be set
Option A: Carry flag will be set but Zero flag will be reset. This matches the standard definition or established fact for the concept asked.
MES Jr. Grade • Paper-III
The modulation index of an amplitude modulated wave is changed from 0 to 1. The transmitted power is
A)
Doubled
B)
Half
C)
Increased by 50%
D)
Unchanged
Based on established principles in the relevant subject area, the correct and most appropriate choice is 'Doubled' (Option A).
MES Jr. Grade • Paper-III
Which modulator is an indirect way of generating FM?
A)
Reactance FET
B)
Varactor diode
C)
Armstrong
D)
Reactance bipolar transistor
Based on established principles in the relevant subject area, the correct and most appropriate choice is 'Reactance FET' (Option A).
MES Jr. Grade • Paper-III
Setting contents of a microprocessor to zero can be efficiently done by
A)
MOV Immediate instruction using zero as immediate data
B)
AND Immediate instruction using zero as immediate data
C)
XORing register with itself
D)
None of these
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'None of these' (Option D).
MES Jr. Grade • Paper-III
Gunn domains start near
A)
Cathode region
B)
Anode region
C)
Middle of the diode
D)
Start of the diode
Based on established principles in the relevant subject area, the correct and most appropriate choice is 'Start of the diode' (Option D).
MES Jr. Grade • Paper-III
A microprocessor is called an n-bit microprocessor depending upon
A)
Registers’ length
B)
Size of internal data bus
C)
Size of external data bus
D)
None of these
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'Size of internal data bus' (Option B).
MES Jr. Grade • Paper-III
An 8085 assembly language program is given below. Assume that the carry flag is initially unset. The content of the accumulator after the execution of the program is: MVI A, 07H; RLC; MOV B, A; RLC; RLC; ADD B; RRC
A)
8C H
B)
64 H
C)
15 H
D)
23 H
Starting with 07H, RLC gives 0EH, then the next two RLC operations give 1CH and 38H; adding B=0EH gives 46H and RRC gives 23H.
MES Jr. Grade • Paper-III
An 8085 assembly language program is given below. Line 1: MVI A, B5H; Line 2: MVI B, OEH; Line 3: XRI 69H; Line 4: ADD B; Line 5: ANI 9BH; Line 6: CPI 9FH; Line 7: STA 30101 H; Line 8: HLT. After execution of line 7 of the programme, the status of the CY and Z flags will be
A)
CY = 0, Z = 0
B)
CY = 1, Z = 0
C)
CY = 0, Z = 1
D)
CY = 1, Z = 1
B5H XOR 69H = DCH; adding 0EH gives EAH; AND with 9BH gives 8AH. Comparing 8AH with 9FH sets CY and clears Z, so CY=1, Z=0.
MES Jr. Grade • Paper-III
The paths of electrons in magnetron are
A)
Cycloid
B)
Circular
C)
Elliptical
D)
Parabolic
Based on established principles in the relevant subject area, the correct and most appropriate choice is 'Parabolic' (Option D).
MES Jr. Grade • Paper-III
Twists are useful to change
A)
Direction of propagation
B)
Orientation of E vector
C)
Splitting the propagation
D)
Blocking the propagation
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'Blocking the propagation' (Option D).
MES Jr. Grade • Paper-III
The standard IF value for FM receivers is
A)
10.7 MHz
B)
110.7 MHz
C)
400 MHz
D)
500 MHz
Option A: 10.7 MHz. The result follows from the standard engineering relationship for the stated conditions.
MES Jr. Grade • Paper-III
With reference to 8085 microprocessor, ANA R/M is
A)
An arithmetic instruction
B)
A logic instruction
C)
Data transfer instruction
D)
Control instruction
Option B: A logic instruction. This matches the standard definition or established fact for the concept asked.
MES Jr. Grade • Paper-III
If Pr and Pi are reflected and incident powers, then the reflection coefficient r is
A)
r = sqrt(Pr/Pi)
B)
r = Pr/Pi
C)
r = Pi/Pr
D)
r = sqrt(Pi/Pr)
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'r = sqrt(Pr/Pi)' (Option A).
MES Jr. Grade • Paper-III
In rotary phase shifter, rotable section plate is
A)
Half wavelength
B)
Horizontal
C)
One wave length
D)
Vertical
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'Horizontal' (Option B).
MES Jr. Grade • Paper-III
In phase modulation, the frequency deviation is
A)
Independent of the modulating signal frequency
B)
Inversely proportional to the modulating signal frequency
C)
Directly proportional to the modulating signal frequency
D)
Inversely proportional to the square root of the modulating frequency.
Option C: Directly proportional to the modulating signal frequency. The result follows from the standard engineering relationship for the stated conditions.
MES Jr. Grade • Paper-III
Cut off wavelength of circular waveguide in TM mode is
A)
2aπ / (m^2 + n^2)^1/2
B)
2a / (m^2 + n^2)^1/2
C)
2aπ / (m^2 - n^2)^1/2
D)
2a / (m^2 - n^2)^1/2
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is '2aπ / (m^2 - n^2)^1/2' (Option C).
MES Jr. Grade • Paper-III
Due to debunching, the power output of Reflex klystron is
A)
Decreases
B)
Increases
C)
No change
D)
Constant
Based on established principles in the relevant subject area, the correct and most appropriate choice is 'Increases' (Option B).
MES Jr. Grade • Paper-III
An FM signal has a carrier swing of 100 kHz and a modulating signal of 10kHz. Its modulation index is
A)
0.1
B)
5
C)
10
D)
20
FM modulation index β=Δf/fm=100 kHz/10 kHz=10.
MES Jr. Grade • Paper-III
Q factor is measured using
A)
Reflect metre method
B)
Transmission line method
C)
Power ratio method
D)
Current ratio method
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'Power ratio method' (Option C).
MES Jr. Grade • Paper-III
What is the size(in bits) of the stack pointer in 8085?
A)
8
B)
24
C)
32
D)
16
Option D: 16. This matches the standard definition or established fact for the concept asked.
MES Jr. Grade • Paper-III
The dominant mode in rectangular waveguide is
A)
TE 10
B)
TE 11
C)
TE 12
D)
TE 20
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'TE 11' (Option B).
MES Jr. Grade • Paper-III
Theoretically number of nodes that can exist in cylindrical waveguides
A)
Zero
B)
One
C)
Two
D)
Infinite
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'Two' (Option C).
MES Jr. Grade • Paper-III
The mode used in the laboratory bench is
A)
Dominant mode
B)
Degenerative mode
C)
Regenerative mode
D)
None of the above
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'Dominant mode' (Option A).
