Engineering Trivia Questions for College Students
162 trivia questions with answers, college. Multiple-choice trivia with answers, sorted by topic and level. Reveal the answers below, pick one at random, or present them full-screen.
- 1.
Which of the following are the passive elements?
- ABulb
- BResistor
- CBoth
- DNone of these.
Answer: Both - 2.
The main advantage of dielectric heating is that
- Aheating occurs in the material itself.
- BNone of the above.
- Cit can be used for drying the explosives.
- Dheating occurs due to high frequency.
Answer: heating occurs in the material itself. - 3.
No load saturation characteristics are plotted between
- Ano load voltage and field current
- Bno load voltage and armature current
- Cshort circuit current and armature current
- Dshort circuit current and field current
Answer: no load voltage and field current - 4.
A 4 pole lap wound dc generator has 4 brushes, if one of the brush is damaged, what will be the change in V, I and P ratings
- AV/2, I/2 and P/4
- BV, I and P
- CV/2, I and P/2
- DV, I/2 and P/2
Answer: V, I/2 and P/2 - 5.
Relative error is same as
- Anone of the above.
- Btrue error.
- Cratio of absolute error and true value.
- Dabsolute error.
Answer: ratio of absolute error and true value. - 6.
A sinusoidal signal is analog signal, because
- Ait has positive as well as negative values
- Bit is negative for one half cycle
- Cit is positive for one half cycle
- Dit can have a number of values between the negative and positive peaks
Answer: it can have a number of values between the negative and positive peaks - 7.
Which of the following oscillators are used for low frequency (LF) applications
- ANone
- BRC oscillators
- CBoth LC and RC Oscillators
- DLC oscillators
Answer: RC oscillators - 8.
Five capacitors each of 5 µF are connected in series, the equivalent capacitance of the system will be
- A1 µF
- B5 µF
- C25 µF
- D10 µF
Answer: 1 µF - 9.
In decimal number system what is MSD
- AFirst digit from left to right
- BMiddle digit
- CMean of all digits
- DFirst digit from right to left
Answer: First digit from left to right - 10.
A single phase full bridge inverter can operated in load commutation mode in case load consist of
- ARLC underdamped.
- BRLC critically damped.
- CRL.
- DRLC overdamped.
Answer: RLC underdamped. - 11.
Which of these sets of logic gates are designated as universal gates?
- ANOR, NAND, XNOR.
- BXOR, NOR, NAND.
- CNOR, NAND.
- DOR, NOT, AND.
Answer: NOR, NAND. - 12.
What is the name of the fluorescent material that gives red colour fluorescence?
- AZinc silicate.
- BZinc sulphide.
- CMagnesium silicate.
- DCalcium silicate.
Answer: Magnesium silicate. - 13.
The voltage induced in an inductor is represented as,
- Aproduct of its inductance and rate of change of current through it.
- Bratio of its inductance to current through it.
- Cratio of current through it to its inductance.
- Dproduct of its inductance and current through it.
Answer: product of its inductance and rate of change of current through it. - 14.
A capacitor carries a charge of 0.1 C at 5 V. Its capacitance is
- A0.05 F
- B0.2 F
- C0.02 F
- D0.5 F
Answer: 0.02 F - 15.
If holding current of a thyristor is 2 mA then latching current should be
- A0.009 A.
- B0.004 A.
- C0.002 A.
- D0.01 A.
Answer: 0.004 A. - 16.
Temperature variation is a/an
- AAnalog quantity
- BDigital quantity
- CNone
- DEither Digital or Analog quantity
Answer: Analog quantity - 17.
In binary number system the first digit (bit) from right to left is called as
- ALSB, Least Significant Bit
- BLast Bit
- CFirst Bit
- DMSB, Most Significant Bit
Answer: LSB, Least Significant Bit - 18.
The length of bus cycle in 8086/8088 is four clock cycles, T1, T2, T3, T4 and an indeterminate number of wait state clock cycles denoted by Tw. The wait states are always inserted between
- AT4 & T1
- BT1 & T2
- CT3 & T4
- DT2 & T3
Answer: T3 & T4 - 19.
The number of rings in the Bohr model of any element is determined by what?
- AAtomic mass.
- BAtomic number.
- CColumn number on periodic table.
- DRow number on periodic table.
Answer: Row number on periodic table. - 20.
The supply frequency usually employed for high frequency eddy current heating is
- A10 KHz to 400 KHz.
- B10 MHz.
- C1 KHz.
- D5 KHz.
Answer: 10 KHz to 400 KHz. - 21.
A D-flip-flop is said to be transparent when
- Athe output is LOW
- Bthe output is HIGH
- Cthe output follow input
- Dthe output follows clock
Answer: the output follow input - 22.
A single phase one pulse controlled circuit has a resistance R and counter emf E load 400 sin(314 t) as the source voltage. For a load counter emf of 200 V, the range of firing angle control is
- A60° to 180°.
- B30° to 180°.
- C30° to 150°.
- D60° to 120°.
Answer: 30° to 150°. - 23.
In force-current analogy, electrical analogous quantity for displacement (x) is
- Ainductance.
- Bcapacitance.
- Cflux.
- Dvoltage.
Answer: flux. - 24.
Poles and zeros are arranged alternatively on negative real axis, then type of network is/are
- ABoth 2 and 3.
- BLC network.
- CRC network.
- DRL network.
Answer: Both 2 and 3. - 25.
What is the value of dielectric constant of air?
- A1.
- Bnone of these.
- CLess than 1
- D0.
Answer: 1. - 26.
The Barkhausen criterion for an oscillator
- AThe phase of a feedback signal with respect to input should be 0° or 360°
- BBoth A and C
- CLoop gain should be less than unity
- DLoop gain should be unity
Answer: Both A and C - 27.
FM stands for
- Afrequency moderator.
- Bfrequency modulation.
- Cfrequent modulation.
- Dfrequent moderator.
Answer: frequency modulation. - 28.
A point pole has a strength of 4π * 10^-4 weber. The force in newtons on a point pole of 4π * 1.5 * 10^-4 weber placed at a distance of 10 cm from it will be
- A15 N.
- B20 N.
- C7.5 N.
- D3.75 N.
Answer: 15 N. - 29.
The errors mainly caused by human mistakes are
- Aobservational error.
- Binstrumental error.
- Csystematic error.
- Dgross error.
Answer: gross error. - 30.
LC oscillators are used for produce a waveform with frequency ranging from
- A1MHz to 500 MHz
- B1 KHz to 1 MHz
- C100 KHz to 500 MHz
- D1MHz to 100 GHz
Answer: 1MHz to 500 MHz - 31.
Piezoelectric effect is carried out in
- Am derived.
- Bcomposite filter.
- Ccrystal filter.
- Dconstant k prototype.
Answer: crystal filter. - 32.
In an intel 8085A, which is the first machine cycle of an instruction?
- AAn I/O read cycle
- BA memory read cycle
- CA memory write cycle
- DAn op-code fetch cycle
Answer: An op-code fetch cycle - 33.
Four capacitors each of 40 µF are connected in parallel, the equivalent capacitance of the system will be
- A5 µF
- B40 µF
- C10 µF
- D160 µF
Answer: 160 µF - 34.
Which of the following is the analogous quantity for mass element in force-voltage analogy?
- ACapacitance.
- BResistance.
- CInductance.
- DAll of the above.
Answer: Inductance. - 35.
How many bits are required to store one BCD digit ?
- A1
- B2
- C3
- D4
Answer: 4 - 36.
For dielectric heating the range of frequency normally employed is
- A1 MHz to 10 MHz.
- B100 KHz to 10 MHz.
- C10 KHz to 100 KHz.
- D10 MHz to 40 MHz.
Answer: 10 MHz to 40 MHz. - 37.
The latching current of SCR is 20 mA. Its holding current will be
- A23 mA.
- B10 mA.
- C40 mA.
- D60 mA.
Answer: 10 mA. - 38.
A box which tells the effect of inputs on control sub system is known as
- ADecision box.
- BState box.
- CData Box.
- DLogical box.
Answer: Decision box. - 39.
Lowest critical frequency is due to pole and it may be present at the origin or nearer to the origin, then the type of network is
- ARL.
- BAny of the above.
- CRC.
- DLC.
Answer: RC. - 40.
Electrons in p-type material of a semi-conductor are called as
- Aminority carriers
- Beither minority carriers or majority carriers
- Cvalance carriers
- Dmajority carriers
Answer: minority carriers - 41.
Advantages of open loop control system is/are
- Aall of the above.
- Bsimple and economical.
- Creliable.
- Daccurate.
Answer: simple and economical. - 42.
Speed of data transmission in 4-G network of telecom is
- A100 mbps - 1 gbps.
- B386 kbps - 2 mbps.
- C2 mbps.
- D2 mbps – 1 gbps.
Answer: 100 mbps - 1 gbps. - 43.
A step up chopper has input voltage 110 V and output voltage 150 V. The value of duty cycle is
- A0.32.
- B0.45.
- C0.27.
- D0.67.
Answer: 0.67. - 44.
Voltage controlled oscillators are used commonly in
- AAll the above
- BFrequency Modulators
- CPulse Modulators Frequency Modulators Phase Clocked loops
- DPhase Clocked loops
Answer: All the above - 45.
In Ward-Leonard system, the lower limit of the speed imposed by
- AArmature resistance.
- BResidual magnetism of the generator.
- CField resistance.
- DNone of above.
Answer: Residual magnetism of the generator. - 46.
A Lissajous pattern on an oscilloscope has 5 horinzontal tangencies and 2 vertical tangencies. The frequency of horizontal input is 100 Hz. The frequency of the vertical will be
- A250 Hz.
- B500 Hz.
- C400 Hz.
- D625 Hz.
Answer: 250 Hz. - 47.
A microprocessor is ALU
- Aregister unit and I/O device on a single chip.
- Band control unit on a single chip.
- Cregister unit and control unit on a single chip.
- Dand memory on a single chip.
Answer: register unit and control unit on a single chip. - 48.
If a circuit consists of two mass elements, two spring elements and four friction elements. Find the order of transfer function?
- A12
- B6
- C4
- D2
Answer: 4 - 49.
For a dc machine shunt resistance and armature resistance values are
- Alow and high
- Blow and low
- Chigh and low
- Dhigh and high
Answer: high and low - 50.
Inside a hollow conducting sphere
- Aelectric field changes with magnitude of the charge given to the conductor.
- Belectric field is zero.
- Celectric field is a non zero constant.
- Delectric field changes with distance from the center of the sphere.
Answer: electric field is zero.
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