1. velocity of radio waves is……………. a)
300m/s b)3*103m/s c)3*108
d)30*108m/s
2. line of sight propagation is also
known as …………………a)ground wave b)space
wave c) sky wave d)ground reflected wave
3. ………….frequency is used in ground
wave propagation a)UHF b)HIGH c) LOW d)MEDIUM
4. Q point of antenna will depend up
on…………..of antenna a)length b) outside
diameter c)wavelength d)inside
diameter
5. broadcasting frequency for AM
is…………………… a) 550-1600HZ b) 540-1600KHZ c)88-108MHZ d)455-1500KHZ
6. broadcasting frequency for FM
is……………………… a) 88-100HZ b)
88-108KHZ c)88-108mHZ d)88-108MKHZ
7. IF frequency for AM is……………… a)
455KHZ b) 455MHZ c)540KHZ d)500HZ
8. IF frequency for FM is……………… a107HZ b) 10.7KHZ
c)10.7MHZ d)88MHZ
9. mixer stage is consist of……………. a)RF&LO
b)IF&LO c)RF&IF d)RF&AGC
10. AGC is stands for……………. a)automatic gain constant
b)amplitude gain control c)amplitude gain constant d)amplitude gain control
11. number of side band in FM
is………….. a) 2 b)4 c)1 d)infinity
12. FM is/are used……………type/s of
antenna a) VHF b)UHF c)BOTH
1&2 d)HF
13. pre emphasis and deemphasis used
in………….modulation a)AM b) FM c)PM d)ASK
14. the ability of radio receiver
producing suffiecient AF ouput even for week RF signal a)sensitivity b)selectivity c) fidility
d)s/n ratio
15. hertz antenna width is………….. a)λ
b)
λ/2 c) λ/4 d)2 λ
16.solder contain………….. a)lead-40,tin-60 b) lead-50,tin-5
0 c) lead-60,tin-40 d) lead-40,tin-40
18. ESD means……………. a)electronic standard
defelction b) electro static difference c) electronic static difference d) electro
static discharge
19. CRO displays …………. a) b) c) d)
20. DSO is stands for…………………… a) b) c) d).
21. CRO uses …………… a) b) c) d)
22. CRO flurosent screen uses th e
phosphorous isotope is……….. a)flux b)rosin c) d)
23. in IC 8051 contain …………pins a) b)
c) d)
24. in 8051 contain………….address bits a)
b) c) d)
25. ALE means…………… a) b) c) d)
26. ……………….oscillator is used in 8051
a) b) c) d)
27. in 8051 contain…………..data bits a)
b) c) d)
28. oscillating frequency in
microcontroller is………….. a) b) c) d)
29. MOV A, R4 is an example
for…………….. a) b) c) d)
30. MOV A,#DATA is an example
of……………. a) b) c) d)
31. …………..ports are in 8051 a) b) c)
d)
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