Recent questions

Which technology is used in Compact disks?  A) Mechanical B) Electrical C) Electro Magnetic D) Laser

Which of the following cables can transmit data at high speeds?  A) Coaxial Cable B) Optic Fibre Cable C) Twisted pair Cable D) UTP Cable

Which of the following is not a protective device?  A) MCB B) FUSE C) ELCB D) None of the Above

A system that uses air to power a device/system is called  A) Pneumatic B) Hydraulic C) Automatic D) Super charge 

Which of the following units is connected with discharge in a domestic water pump?  A) Kg/SqCm B) RPM C) LPM D) N/m2

The term ‘SATA’ is associated with which of the following appliances/equipments  A) Washing Machine B) Wet Grinder C) Mixer D) Computer

Which of the following is not an Operating System?  A) UBUNTU B) DOS C) JAVA D) SOLARIS

Storage capacity of a single layer DVD is  A) 4.7GB B) 700MB C) 47GB D) 470MB

Frequency of Indian Electric supply is  A) 230Hz B) 50 Hz C) 440 Hz D) 60 Hz

Intensity of Light can be measured using  A) Anemometer B) IR Thermometer C) Clamp on Meter D) Lux Meter

Which of the following device converts DC to AC?  A) Rectifier B) Boost converter C) Transformer D) Inverter

There are two bearings. Bearing A, rotating at 5000RPM and Bearing B, rotating at 200 RPM. How will you lubricate the above bearings?  A) Bearing A with Oil & Bearing B with Grease B) Bearing B with Oil & Bearing A with Greas C) Both with Oil D) Both with Grease

Which is the most efficient Belt Drive?  A) V Belt B) Flat Belt C) Toothed Belt D) All of the above

What does SMPS stands for  A) Switch Maximum Pulse Supply B) Switched Mode Power Supply C) Switching Main Power Supply D) Selective Mode Power Supply

The purpose of Oil in a distribution Transformer is for  A) Insulation and Cooling B) Lubrication C) Dampening and Lubrication D) None of the above

Which of the following is a low efficient light source?  A) CFL B) HPSV Lamp C) LPMV Lamp D) Tungsten Lamp

A resistor has the following Colour Code. What is the value of the resistor? RED, RED, RED  A) 2200 k Ohm B) 222Ohm C) 2.2kOhm D) 22kOhm

The signal x(t) = sin(t)/t is  A) Even function B) Odd function C) Neither odd nor even D) Both odd and even

The FS of a periodic continuous-time signal x(t) is  A) Continuous Complex-valued function B) Discrete Real-valued function C) Continuous Real-valued function D) Discrete Complex-valued function

How many flip-flops are required to construct a mod-32 counter?  A) 32 B) 6 C) 5 D) 4

A 1 ms pulse can be converted into a 10 ms pulse by using  A) An astable mutivibrator B) A monostable multivibrator C) Bistable multivibrator D) J-K flip flop.

By which of the following connections, one-bit binary counter can be obtained from a JK flip-flop?  A) J = K = 0 B) J = K = 1 C) J = K’ D) None of these

An example of a non-vectored interrupt in 8085 microprocessor is  A) INTR B) TRAP C) RST 5.5 D) RST 7.5

The minimum number of NAND gates required to implement a XOR gate is  A) 5 B) 4 C) 3 D) 6

The fastest logic family among the below given ones is  A) TTL B) ECL C) CMOS D) I 2 L

Schmitt trigger is an example of a  A) Mono-stable multivibrator B) Bistable multivibrator C) Astable multivibrator D) None of the above

Darlington pair amplifier refers to cascaded combination of  A) Two common collectors B) Common collector and common emitter C) Common Base and Common emitter D) None of the above

The upper cut off frequency of a capacitive coupled RC amplifier is decided by  A) Input Coupling capacitance B) Transistor internal capacitances C) Output coupling capacitance D) Bypass capacitance

Which of the following amplifier configurations has the lowest input resistance?  A) Common Emitter B) Common Base C) Common Collector D) Emitter Follower

Which of the following statements holds for the divergence of electric and magnetic flux densities?  A) Both are zero B) These are zero for static densities but non zero for time varying densities C) It is zero for electric flux density D) It is zero for magnetic flux density

A point charge of 120 mC is placed at the centre of a cube. What will be the total flux passing through one face of the cube?  A) 120 mC B) 60 mC C) 20 mC D) 30 mC

If an energy meter disc makes 10 revolutions in 100 seconds when a load of 450W is connected to it, the meter constant in revolutions per kWh is  A) 1000 B) 500 C) 1600 D) 800

If one of the control springs of PMMC ammeter is broken when it is connected in a circuit, the meter will read  A) Half the correct value of current B) Twice the correct value of current C) An indefinite figure D) Zero

The range of a dc milliammeter can be extended by utilizing a  A) Series high resistance B) Series low resistance C) Shunt of high resistance D) Shunt of low resistance

DC ammeter has a resistance of 0.1 Ω and its current range is 0-100 A. If the range is to be extended to 0-300 A, what shunt resistance need to be connected?  A) 0.025 Ω B) 0.05 Ω C) 0.015 Ω D) 0.03 Ω

The Q-meter works on the principle of  A) Mutual inductance B) Self inductance C) Series resonance D) Parallel resonance

A Wheatstone bridge requires a change of 10 Ω in the unknown arm of the bridge to produce a change in deflection of 5 mm of the galvanometer. The sensitivity of the galvanometer will be  A) 0.5 mm/ Ω B) 2 Ω/ mm C) Either A or B D) 5 mm/ Ω

A lag compensator with the zero 10 times farther from the imaginary axis than the compensator pole can improve the steady state error by a factor of  A) 10 B) 5 C) 20 D) 2

A derivative controller is mainly used for  A) Improving transient response B) Decreasing steady state error C) Making steady state error zero D) All the above

All pass network imparts  A) Negative phase shift to input B) Positive phase shift to input C) 90 degree phase shift to input D) 180 degree phase shift to input

A system has transfer function (1–s) ÷ (1+s). It is  A) Non minimum phase transfer function B) Minimum phase transfer function C) Low pass system D) Second order system

The dc gain of the system represented by the transfer function G(s)=(s+6)/((s+2)(s+3)) is  A) 1 B) 2 C) 5 D) 6

In a second order system the value of resonant peak will be unity when the damping ratio has a value of  A) Zero B) Unity C) 0.707 D) 0.414

The Bode plot is used to analyze  A) All phase network B) Minimum phase network C) Non minimum phase network D) All networks 

For a type three-control system the asymptote at lower frequency will have a slope  A) – 6 db per octave B) – 18 db per octave C) – 20 db per octave D) – 60 db per octave

The unity circle of Nyquist plot corresponds to zero dB line of Bode plot for  A) High frequencies B) Low frequencies C) Medium frequencies D) All frequencies

The transient step response of two systems exhibits same peak time. The dominant poles of the two systems can be represented in s plane along  A) A line parallel to X axis B) A line parallel to Y axis C) A line at an angle to negative real axis D) A semicircle

For better relative stability, the values of gain margin and phase margin should be respectively  A) 6 db, 15 degree B) 10 db, 15 degree C) 10 db, 30 degree D) 6 db, 30 degree

A plant is modeled as 1/(s(s+3)) with unity feedback control system and a cascade PI controller. How many state variables are required for state model description?   A) 1 B) 2 C) 3 D) 4 

The steady state acceleration error of type-1 system is  A) Unity B) Infinity C) Constant D) Zero