20-11-2012, 06:08 PM
ELECTRICAL ENGINEERING (OBJECCTIVE TYPE) PAPER – II
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01. For a memory system, the cycle time is
(a) Same as the access time (b) Larger than the access time
© Shorter than the access time (d) Sub – multiple of the access time
Ans: (b)
02. When referring to instruction words, amnemonic is
(a) A short abbreviation for the operand address
(b) A short abbreviation for the operation to be performed
© A short abbreviation for the data word stored at the operand address
(d) Shorthand for machine language
Ans: (b)
03. The instruction PCHL in 8085 is used for
(a) Load PC with contents of HL
(b) Load HL with contents of memory location pointed by PC
© Load Hl with contents of PC
(d) Load PC with the contents of memory location pointed by HL pair
Ans: (a)
04. An 8085 microprocessor based system uses a 4K 8 – bit RAM whose starting address is
AA00H. The address of the last byte in this RAM is
(a) 0FFFH (b) 1000H © B9FFH (d) BA00H
Ans: ©
05. The following is not true for RS232 standard :
(a) It establishes the way data is coded
(b) It defines signal voltage levels
© Does not decide data transmission rate
(d) It defines standard connector configurations
Ans: ©
06. In case of dynamic memory
(a) Contents tend to decay over a period of time
(b) Contents are retained without distortion
© Power consumption is low
(d) The speed is low as compared to static memory
Ans: (a, c & d)
07. How many initialization Command Words are essential if 8259 is used in single chip with
special fully nested mode configuration ?
(a) 2 (b) 3 © 4 (d) 1
Ans: (a)
08. Number of address lines necessary to connect 8 k memory chip is
(a) 10 (b) 11 © 12 (d) 13
Ans: (d)
09. In double sideband suppressed carrier modulation, the modulated wave undergoes phase
reversal, whenever
(a) Modulating signal’s amplitude decreases
(b) Modulating signal’s amplitude increases
© Modulating signal crosses zero
(d) Carrier signal crosses zero
Ans: ©
10. One of the main functions of RF stage amplifier in Super Heterodyne Radio Receiver is
to
(a) Provide improved tracking (b) Permit better adjacent channel rejection
© Increase tuning range of the receiver (d) Improve rejection of image frequency
Ans: (d)
11. Good voice reproduction via PCM requires 128 quantization levels. If bandwidth of voice
channel is 4 kHz, then data rate is
(a) 250 kbps (b) 128 kbps © 56 kbps (d) 28 kbps
Ans: ©
12. All types of linear modulation can be detected by
(a) Product demodulator (b) Envelop detector
© Filtering (d) Linear detector
Ans: (a)
13. Bandwidth occupied by 100 MHz carrier, AM modulated by signal frequency of 10 kHz
is
(a) 100 MHz (b) 20 kHz © 10 kHz (d) 110 MHz
Ans: (b)
14. The maximum deviation allowed in a frequency modulation system is 100 kHz; the
modulating signal frequency is 10 kHz. The bandwidth requirement as per Carson’s rule
will be
(a) 220 kHz (b) 110 kHz © 120 kHz (d) 210 kHz
Ans: (a)