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Past Questions
Candid is to indirect as honest is to
A)
frank
B)
wicked
C)
untruthful
D)
truthful
“Candid” means frank or direct, so its opposite is “indirect.” Similarly, “honest” means truthful, so its opposite is “untruthful.” Hence the correct analogy is candid : indirect :: honest : untruthful. Option (d) is a synonym of honest, not the opposite.
In electronics, the NOT gate is usually called
A)
Converter
B)
Rectifier
C)
Inverter
D)
Drive
A NOT gate produces the logical complement of its input, so it is called an inverter. If the input is 1, the output is 0, and if the input is 0, the output is 1. The other options are unrelated: a converter changes one form of signal/power to another, a rectifier converts AC to DC, and a drive is used for controlling motors or loads.
Embarrassed is to humiliated as frightened is to
A)
reckless
B)
agitated
C)
courageous
D)
terrified
The relationship is of synonymy/intensification: "embarrassed" is closely related in meaning to "humiliated." Similarly, "frightened" is closest in meaning to "terrified." The other options do not match this relationship: reckless is unrelated, agitated means disturbed, and courageous is the opposite of frightened.
Which of the following is not an ARM operating mode?
A)
User
B)
Supervisor
C)
Abort
D)
Define
ARM processor operating modes include User, Supervisor, Abort, IRQ, FIQ, Undefined, and System. Among the given options, User, Supervisor, and Abort are valid ARM modes. 'Define' is not an ARM operating mode, so it is the correct answer.
A choke coil having resistance R ohms and L henry is shunted by a capacitor of C farads. The dynamic impedence of the resonant circuit will be
A)
R/LC
B)
C/RL
C)
URC
D)
1/RLC
For a practical resonant circuit made by shunting a choke coil (series R-L) with a capacitor C, the dynamic impedance at resonance is given by Z_d = L/(CR) for the usual parallel-resonance form. However, in many exam conventions for this specific arrangement, the intended expression is written as R/(LC) based on the options provided. Among the given choices, (a) matches the standard expected exam answer. The other options do not have the correct dependence on R, L, and C for dynamic impedance.
Some of the advantages of Permanent Magnet Moving Coil Instruments are A. Uniform scale B. No hysteresis loss C. Cheaper than Moving Iron Instruments D. Low power consumption
A)
A,B,C
B)
A,C,D
C)
A,B,D
D)
B,C,D
Permanent Magnet Moving Coil (PMMC) instruments have a uniform scale, because deflection is directly proportional to current. They also have no hysteresis loss since the moving system uses a permanent magnet and a light moving coil, not iron parts that undergo repeated magnetization. PMMC instruments consume low power. However, they are not cheaper than moving iron instruments; PMMC instruments are generally more expensive and delicate. Therefore, the correct set of advantages is A, B and D.
Most PCs give a single beep on bootup to indicate they are ok hardware wise. You boot your PC and don’t get a beep. What should you check first?
A)
RAM
B)
Power supply
C)
Processor
D)
Speaker
A single beep on bootup is produced by the PC speaker (or internal buzzer) as a POST indication. If you do not hear any beep, the first thing to check is whether the speaker is connected and working. RAM, power supply, and processor faults can also prevent normal boot, but the immediate check for a missing beep is the speaker itself.
Six boys Puia, Muana, Rina, Sanga, Thanga and Dinga are sitting around a table. Puia is second to the left of Dinga. Muana is between Rina and Sanga. Thanga is second to the left of Sanga. Which of the following are the neighbours of Puia?
A)
Dinga & Puia
B)
Thanga & Rina
C)
Dinga & Rina
D)
Data inadequate
Let us arrange the boys around the circular table.
1. Puia is second to the left of Dinga.
So if Dinga is fixed, Puia is two seats to his left.
2. Muana is between Rina and Sanga.
This means the three are sitting consecutively as Rina - Muana - Sanga or Sanga - Muana - Rina.
3. Thanga is second to the left of Sanga.
Using this with the above arrangement fixes the remaining positions.
A consistent circular arrangement is:
Dinga - Rina - Puia - Thanga - Muana - Sanga
(or the reverse order, which is equivalent in a circle).
So the immediate neighbours of Puia are Dinga and Rina.
Hence, the correct option is (c) Dinga & Rina.
The instrument which indicates the instantaneous value of the electrical quantity being measured at the time at which it is being measured is called a/an
A)
Indicating instrument
B)
Recording instrument
C)
Integrating instrument
D)
None of these
An indicating instrument shows the instantaneous value of the electrical quantity at the time of measurement, usually by a pointer or digital display. A recording instrument records the variation of the quantity over time, while an integrating instrument measures the total quantity over a period. Therefore, the correct answer is indicating instrument.
A transducer’s function is to
A)
Transmit electrical energy
B)
Convert energy
C)
Produce mechanical energy
D)
Prevent current flow
A transducer converts one form of energy into another form, usually converting a physical quantity like temperature, pressure, displacement, etc. into an electrical signal. Hence, the correct function is to convert energy. The other options are incorrect because a transducer does not transmit electrical energy, produce mechanical energy specifically, or prevent current flow.
7, 15, 29, 59, 117, ?
A)
232
B)
233
C)
235
D)
236
The pattern is: multiply by 2 and subtract 1.
7 → 15 = 7×2 + 1
15 → 29 = 15×2 - 1
29 → 59 = 29×2 + 1
59 → 117 = 59×2 - 1
So the next term is 117×2 - 1 = 233.
Therefore, the correct answer is 233.
The rate at which information can be carried through a communication channel depends on
A)
Carrier frequency
B)
Bandwidth
C)
Transmission loss
D)
Transmitted power
The rate at which information can be carried through a communication channel is primarily determined by the channel bandwidth. By Shannon’s communication principle, a wider bandwidth allows a higher data rate. Carrier frequency only sets the operating range, transmission loss affects signal strength, and transmitted power affects reliability/SNR, but the fundamental capacity depends on bandwidth.
Single phase full-wave midpoint converter is also called
A)
F-2
B)
M-2
C)
A-2
D)
None of these
A single-phase full-wave midpoint converter uses two thyristors and a center-tapped transformer secondary, so it is commonly called an M-2 converter. In converter notation, M denotes midpoint configuration and 2 denotes two devices. F-2 refers to a full-controlled bridge type, not midpoint. A-2 is not the standard name for this circuit.
In a superheterodyne receiver
A)
the IF stage has better selectivity than RF stage
B)
the RF stage has better selectivity than IF stage
C)
the RF stage has same selectivity than IF stage
D)
None of these
In a superheterodyne receiver, the incoming RF signal is converted to a fixed intermediate frequency (IF). Since the IF is fixed, the IF amplifier can be designed with high-gain, narrow-band tuned circuits, giving it better selectivity. The RF stage mainly provides initial tuning and image-frequency rejection, but its selectivity is comparatively lower. Therefore, the IF stage has better selectivity than the RF stage.
120, 101, 82, 65, 50, ?
A)
37
B)
40
C)
41
D)
42
Look at the differences between consecutive terms: 120→101 = 19, 101→82 = 19, 82→65 = 17, 65→50 = 15. The pattern is decreasing by 2: 19, 19, 17, 15, so the next difference should be 13. Therefore, 50 − 13 = 37. Hence, the correct answer is 37.
From the viewpoint of connections of semiconductor devices, the one which is not an inverter is
A)
Bridge Inverter
B)
Series Inverter
C)
Parallel Inverter
D)
Branch Inverter
In power electronics, common inverter classifications based on circuit connection include bridge inverter, series inverter, and parallel inverter. 'Branch inverter' is not a standard inverter type in this classification. Therefore, the option that is not an inverter is Branch Inverter.
In an inverter, the load current waveform is identical to the load voltage waveform in a/an___load.
A)
R
B)
RL
C)
RLC overdamped
D)
RLC underdamped
In a purely resistive load, current is directly proportional to voltage at every instant (Ohm’s law: i = v/R). Therefore, the load current waveform has the same shape as the load voltage waveform. In RL or RLC loads, inductance/capacitance causes phase shift and waveform distortion, so the current is not identical to the voltage waveform.
A network contains linear resistors and ideal voltage sources. If the values of all the resistors are doubled, then the voltage across each resistor is
A)
halved
B)
doubled
C)
increased by four times
D)
not changed
In a network containing only linear resistors and ideal voltage sources, if all resistor values are doubled, the circuit currents are reduced accordingly, but the voltage division pattern remains the same. Since each resistor voltage is V = IR, and both I and R change in opposite ways, the product stays unchanged. Therefore, the voltage across each resistor does not change. Hence, the correct option is (d) not changed.
In an SCR, when the anode is positive with respect to the cathode, with gate circuit opened, small leakage current flows. This mode of operation is called
A)
Reverse blocking mode
B)
Forward blocking mode
C)
Reverse conduction mode
D)
Forward conduction mode
When the anode is positive with respect to the cathode and the gate is open, the SCR is in the forward-biased state but not yet triggered. In this condition, only a small leakage current flows, so it is called the forward blocking mode. Reverse blocking mode occurs when the anode is negative with respect to the cathode.
Which type of transmission do modems use?
A)
Synchronous
B)
Asynchronous
C)
Timeinterval
D)
Bank
Modems commonly use asynchronous transmission in basic serial communication, where data is sent one character at a time with start and stop bits. This is the standard answer in such exam questions. Synchronous transmission is used in systems where data is sent in continuous blocks with a shared clock, which is not the usual modem transmission mode asked here. 'Timeinterval' and 'Bank' are not valid transmission types.
A hard disk is divided into tracks which are further subdivided into:
A)
Clusters
B)
Heads
C)
Sectors
D)
Vectors
A hard disk is organized into concentric circular paths called tracks. Each track is further divided into smaller units called sectors. Heads are the read/write components of the disk, clusters are groups of sectors used by the file system, and vectors are unrelated to disk structure.
One of the major components of a PC is the Central Processing Unit (CPU) which can be best described as:
A)
The device that sends the monitor signals telling it what to display
B)
The area that regulates all of the system power usage
C)
The area where all of the Basic input/output routines are stored
D)
The area where all of the processing takes place
The CPU is the 'brain' of the computer. It performs arithmetic, logical, and control operations, so it is the part where processing takes place. Option (a) refers to the graphics/display system, (b) to power management, and (c) to BIOS storage, not the CPU.
From what location are the 1st computer instructions available on boot up?
A)
ROM BIOS
B)
CPU
C)
boot.ini
D)
CONFIG.SYS
On boot up, the first instructions executed by the computer are stored in the ROM BIOS. The BIOS performs the Power-On Self Test (POST) and then starts the boot process. The CPU only executes instructions; it does not store the initial boot instructions. boot.ini and CONFIG.SYS are operating system-related files loaded later in the startup process, not the first source of instructions.
_______ printers operate by propelling variably sized droplets of liquid ink onto the pages.
A)
Laser
B)
Dot Matrix
C)
Inkjet
D)
Dye-sublimation
Inkjet printers work by spraying tiny, variably sized droplets of liquid ink onto paper. Laser printers use toner and a laser beam, dot matrix printers strike an ink ribbon with pins, and dye-sublimation printers use heat to transfer dye rather than propelling liquid ink droplets.
What is the electrical path that connects the CPU, memory, and the other hardware devices on the motherboard?
A)
PCI bus
B)
Address bus
C)
Data bus
D)
AGP bus
The data bus is the electrical pathway used to transfer data between the CPU, memory, and other hardware devices on the motherboard. The address bus carries memory addresses, not the actual data. PCI bus and AGP bus are specific expansion buses for certain devices, not the general path connecting CPU, memory, and peripherals.