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Full Test 2 - EKT EEE - AFCAT MCQ


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30 Questions MCQ Test IAF AFCAT Mock Test Series and EKT for (ME, EEE, CSE) 2025 - Full Test 2 - EKT EEE

Full Test 2 - EKT EEE for AFCAT 2024 is part of IAF AFCAT Mock Test Series and EKT for (ME, EEE, CSE) 2025 preparation. The Full Test 2 - EKT EEE questions and answers have been prepared according to the AFCAT exam syllabus.The Full Test 2 - EKT EEE MCQs are made for AFCAT 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Full Test 2 - EKT EEE below.
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Full Test 2 - EKT EEE - Question 1

The inverse of the matrix    is

Detailed Solution for Full Test 2 - EKT EEE - Question 1

The determinant if matrix A is given as

|A|=−1

Full Test 2 - EKT EEE - Question 2

If x = r cos θ, y = r sin θ then  is equal to

Detailed Solution for Full Test 2 - EKT EEE - Question 2

For x = r cos θ, y = r sin θ

We have x2+y2=r2

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Full Test 2 - EKT EEE - Question 3

The order of differential equation  

Detailed Solution for Full Test 2 - EKT EEE - Question 3

Order of the differential equation is the highest derivative in a differential equation. Hence the order is 2. 

Full Test 2 - EKT EEE - Question 4

If x=cosθ+jsinθ the value of  is

Detailed Solution for Full Test 2 - EKT EEE - Question 4

We can write xn=cosnθ+jsinnθ
The given equation can be written as 
=cosnθ+jsinnθ+cosnθ−jsinnθ
=2cosnθ

Full Test 2 - EKT EEE - Question 5

Find the value of 

Detailed Solution for Full Test 2 - EKT EEE - Question 5

Full Test 2 - EKT EEE - Question 6

The forces which meet at one point and have their lines of action in different planes are called _____.

Detailed Solution for Full Test 2 - EKT EEE - Question 6



Full Test 2 - EKT EEE - Question 7

A circuit has a resistance of 12 Ω and an impedance of 15 Ω. The power factor of the circuit will be

Detailed Solution for Full Test 2 - EKT EEE - Question 7

The power factor will be given as cosϕcos⁡ϕ. It can be calculated as ratio of resistance to impedance. Thus, .

Full Test 2 - EKT EEE - Question 8

For the symbols having their usual meanings, which of the following is correct?

Detailed Solution for Full Test 2 - EKT EEE - Question 8

Here C is the capacitance, Q is the charge and V is the voltage for a given capacitor. Their relation is being given as Q = CV.

Full Test 2 - EKT EEE - Question 9

The dimensions of power are

Detailed Solution for Full Test 2 - EKT EEE - Question 9

Dimensions of force is MLT−2. Energy = Force × Distance. Dimensions of energy are ML2T−2. Power is energy per unit time. The dimensions of power are ML2T−3.

Full Test 2 - EKT EEE - Question 10

The speed of electromagnetic waves in free space is _____ m/s.

Detailed Solution for Full Test 2 - EKT EEE - Question 10

The speed of electromagnetic waves in free space is equal to the velocity of light.

Full Test 2 - EKT EEE - Question 11

A laser produces intense, monochromatic, coherent light by which of the following process?

Detailed Solution for Full Test 2 - EKT EEE - Question 11

A laser makes monochromatic light of a single, very precise frequency and colour. The laser line is also very coherent as the crest of every wave is lined up with the crest of other waves.

Full Test 2 - EKT EEE - Question 12

In orthographic projection, the object is placed with one of its faces ______ to the picture plane.

Detailed Solution for Full Test 2 - EKT EEE - Question 12

Orthographic projection, a common method of representing three-dimensional objects, usually by three two-dimensional drawings in each of which the object is viewed along parallel lines that are perpendicular to the plane of the drawing.

Full Test 2 - EKT EEE - Question 13

The given circuit represent

Detailed Solution for Full Test 2 - EKT EEE - Question 13

The given Op-Amp circuit uses positive feedback with input through inverting terminal it is a Schmitt trigger, since a Schmitt trigger circuit is also called a regenerative comparator circuit. The circuit is designed with a positive feedback and hence will have a regenerative action which will make the output switch levels.

It is basically an inverting comparator circuit with a positive feedback. The purpose of the Schmitt trigger is to convert any regular or irregular shaped input waveform into a square wave output voltage or pulse. Thus, it can also be called a squaring circuit.

Full Test 2 - EKT EEE - Question 14

An amplifier without feedback has a gain of 100. Then the gain of amplifier with a negative feedback of 0.49 is_______

Detailed Solution for Full Test 2 - EKT EEE - Question 14

Gain with feedback 

Full Test 2 - EKT EEE - Question 15

In a RC phase shift oscillator, the minimum number of R-C networks to be connected in cascade will be

Detailed Solution for Full Test 2 - EKT EEE - Question 15

RC phase shift oscillator is used to invert the input for 180° phase difference. The single R-C network gives the 60° phase shift. Hence, we need three set of R-C network which have to be connected in cascade (series). The value of R and C can be chosen by the formula, 

Full Test 2 - EKT EEE - Question 16

Filter in a rectify circuit makes the ripple factor

Detailed Solution for Full Test 2 - EKT EEE - Question 16

Filter removes higher frequency component of rectified cutout signal therefore filter reduces ripple present in the signal and which gives smaller ripple factor.

Full Test 2 - EKT EEE - Question 17

When P-type substance is connected with negative and n-type is connected with positive terminal of the battery then P-n junction diode is in

Detailed Solution for Full Test 2 - EKT EEE - Question 17

When a positive voltage is applied to the N-type material and a negative voltage is applied to the P-type material, then a diode is connected in a reverse bias condition. In reserve bias the holes and electrons are attracted to the battery terminal and depletion region increased.

Full Test 2 - EKT EEE - Question 18

Hexadecimal equivalent of binary number 10001101011001 is

Detailed Solution for Full Test 2 - EKT EEE - Question 18

(10001101011001)2=(0010−0011−0101−1001)2=(2359)H

Hexadecimal equivalent of binary number 10001101011001 is 2359

Full Test 2 - EKT EEE - Question 19

A half adder includes

Detailed Solution for Full Test 2 - EKT EEE - Question 19

The half adder adds two single binary digits A and B. It has two outputs, sum (S) and carry (C). The carry signal represents an overflow into the next digit of a multi-digit addition. A half adder circuit is basically made up of an a AND gate with XOR gate.
Sum (S) = A⊕BA⊕B

Carry (C) = AB

Full Test 2 - EKT EEE - Question 20

Which of the following is universal gate?

Detailed Solution for Full Test 2 - EKT EEE - Question 20

NAND is a universal gate that means we can implement a whole logic whatever you can implement using AND, OR, Invert combination can be implement using NAND gates alone similarly NOR gates alone.

Full Test 2 - EKT EEE - Question 21

The output of logic gate is ‘1’ when all its inputs are at logic ‘0’, The gate is a either

Detailed Solution for Full Test 2 - EKT EEE - Question 21

A NOR or an EX - NOR gate is one which gives the value one if and only if all operands have a value of zero and otherwise has a value of zero.

Full Test 2 - EKT EEE - Question 22

The fractional slip of an induction motor is to ratio

Detailed Solution for Full Test 2 - EKT EEE - Question 22

In an induction motor, the rotor copper losses are given as I2r2, while the rotor input and rotor output are expressed as 

Full Test 2 - EKT EEE - Question 23

Transformer ratings are usually expressed in terms of

Detailed Solution for Full Test 2 - EKT EEE - Question 23

Transformer voltage comes into play in iron losses and the current is used to calculate copper losses. Thus the transformer ratings consist of both voltage and current and thus the ratings are expressed in KVA.

Full Test 2 - EKT EEE - Question 24

Under commutation in a dc machine gives rise to

Detailed Solution for Full Test 2 - EKT EEE - Question 24

In under commutation, the commutation does not complete before the brush has moved from one commutator segment to the next. This leads to sparking at the trailing edge of the brush.

Full Test 2 - EKT EEE - Question 25

Cogging of motor implies that motor

Detailed Solution for Full Test 2 - EKT EEE - Question 25

At cogging, the stator and rotor teeth get locked and rotor stops rotating after the locking.

Full Test 2 - EKT EEE - Question 26

The stator frame in an induction motor is used

Detailed Solution for Full Test 2 - EKT EEE - Question 26

The stator frame is the outermost part of the induction motor. It is made up of the cast iron and its main function is to provide mechanical support to the stator core. It is not designed to carry the stator flux.

Full Test 2 - EKT EEE - Question 27

In Bipolar Junction transistors, type of configuration which will give both voltage gain and current gain is

Detailed Solution for Full Test 2 - EKT EEE - Question 27

Following are the 3 types of configuration:

  • Common Base (CB) Configuration: no current gain but voltage gain
  • Common Collector (CC) Configuration: current gain but no voltage gain
  • Common Emitter (CE) Configuration: current gain and voltage gain
Full Test 2 - EKT EEE - Question 28

When germanium is doped with pentavalent impurity, the resulting material is 

Detailed Solution for Full Test 2 - EKT EEE - Question 28

When we pop in a pentavalent element into the lattice. We have doped the silicon lattice with Phosphorous, a pentavalent element. Now pentavalent element has five electrons, so it shares a electron with each of the four neighbouring silicon atoms, hence four atoms are tied up with the silicon atoms in the lattice. This leaves an electron extra. This excess electron is free to move and is responsible conduction. Hence N-type (Negative Type) extrinsic semiconductor (silicon in this case) is made by doping the semiconductor with pentavalent element.

Full Test 2 - EKT EEE - Question 29

A Schottky diode is a

Detailed Solution for Full Test 2 - EKT EEE - Question 29

It is a majority carrier device. It is a semiconductor diode with a very fast switching action, but a low forward voltage drop. When a current flows through the diode there is a small voltage drop across the diode terminals. In a normal diode, the voltage drop is between 0.6 to 1.7 volts, while in a Schottky diode the voltage drop normally ranges between 0.15 and 0.45volts. This lower voltage drop provides higher switching speed and better system efficiency.

In Schottky diode, a semiconductor-metal junction is formed between a semiconductor and a metal, thus creating a Schottky barrier. The N-type semiconductor acts as a cathode and the metal side acts as the anode of the diode. The Schottky barrier diode is a unidirectional device conducting current flows only in one direction.

Full Test 2 - EKT EEE - Question 30

Avalanche break down results basically due to

Detailed Solution for Full Test 2 - EKT EEE - Question 30

The Avalanche breakdown happens if the reverse bias voltage is very high, then the velocity and associated kinetic energy of carriers increases to a point that impact will cause ionization process  to a point where a high avalanche current is established.

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