Mechanical Engineering Exam  >  Mechanical Engineering Tests  >  Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Mechanical Engineering MCQ

Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Mechanical Engineering MCQ


Test Description

30 Questions MCQ Test - Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1)

Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) questions and answers have been prepared according to the Mechanical Engineering exam syllabus.The Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) MCQs are made for Mechanical Engineering 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) below.
Solutions of Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) questions in English are available as part of our course for Mechanical Engineering & Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) solutions in Hindi for Mechanical Engineering course. Download more important topics, notes, lectures and mock test series for Mechanical Engineering Exam by signing up for free. Attempt Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) | 65 questions in 180 minutes | Mock test for Mechanical Engineering preparation | Free important questions MCQ to study for Mechanical Engineering Exam | Download free PDF with solutions
Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 1

He is known for his unscrupulous ways. He always sheds _______ tears to deceive people.

Detailed Solution for Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 1

The term crocodile tears refers to hyporite crying. It is a false or insincere display of grief.

Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 2

The bar graph shows the data of the students who appeared and passed in an examination for four schools P, Q, R and S. The average of success rates (in percentage) of these four schools is __________.​

Detailed Solution for Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 2

Average percentage of passing students = 

1 Crore+ students have signed up on EduRev. Have you? Download the App
Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 3

Select the graph that schematically represents BOTH y = xm and y = x1/m properly in the interval 0 ≤ x ≤ 1. For integer values of m,  where m > 1.
 

Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 4

Define [x ] as the greatest integer less than or equal to x, for each x ∈(–∞, ∞). If y = [x], then area under y for x ∈[1, 4] is _______.

Detailed Solution for Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 4


Area = 1 × 1 + 1 × 2 + 1 × 3
= 1 + 2 + 3 = 6

Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 5

P, Q, R and S are to be uniquely coded using α and β. If P is coded as αα and Q as αβ, then R and S, respectively, can be coded as ________.

Detailed Solution for Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 5

βα and ββ
Given,
code of P = αα
code of Q = αβ
these
code of R = βα
and
code of S = ββ

Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 6

Crowd funding deals with mobilisation of funds for a project from a large number of people, who would be willing to invest smaller amounts through web-based platforms in the project. Based on the above paragraph, which of the following is correct about crowd funding?

Detailed Solution for Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 6

Crowd funding has been defined as a large number of people making small cantribution for a project. Only option and is implied.

Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 7

Jofra Archer, the England fast bowler, is _______ than accurate.

Detailed Solution for Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 7

When two qualities of the same noun are compared, more + positive degree adjective is used. Use more fast and not ‘faster’.

Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 8

Select the word that fits the analogy:​
Build : Building : : Grow : _______

Detailed Solution for Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 8

Build : Building
(verb)  (noun)
Grow : Growth
(verb)   (noun)

Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 9

I do not think you know the case well enough to have opinions. Having said that, I agree with your other point. What does the phrase “having said that” mean in the given text?

Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 10

The sum of the first n terms in the sequence 8, 88, 888, 8888, .... is ______.

Detailed Solution for Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 10

Using throw options put n = 1 and n = 2
Actual method:
8 + 88 + 888 + ......
8[1 + 11 + 111 + ......]

*Answer can only contain numeric values
Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 11

For three vectors whereare unit vectors along the axes of a right-handed rectangular/Cartesian coordinate system, the value of  is __________.


Detailed Solution for Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 11

+ 6 = 0 + 6 = 6

*Answer can only contain numeric values
Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 12

He compressor of a gas turbine plant, operating on an ideal intercooled Brayton cycle, accomplishes an overall compression ratio of 6 in a two-stage compression process, Intercooling is used to cool the air coming out from the first stage to the inlet temperature of the first stage, before its entry to the second stage. Air enters the compressor at 300 K and 100 kPa. If the properties of gas are constant, the intercooling pressure for minimum compressor work is________ kPa (round off to 2 decimal places).


Detailed Solution for Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 12

P3/P1 = 6  ⇒ P3 = 600 kPa
Intermediate pressure = 

Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 13

The Laplace transform of a function f (t) is L(f ) =  Then, f(t) is

Detailed Solution for Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 13

Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 14

Match the following.​

Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 15

A single-degree-of-freedom oscillator is subjected to harmonic excitation F (t) = F0cos(ωt ) as shown in the figure.

The non-zero value of ω, for which the amplitude of the force transmitted to the ground will be F0, is

Detailed Solution for Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 15

Given,
FT = F0
Then transmissibility




Taking (–ve) sign
⇒ 
⇒ 
⇒ 

Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 16

For an ideal gas, the value of the Joule-Thomson coefficient is

Detailed Solution for Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 16

Value of Joule Thomson coefficient for ideal gas μ = 

Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 17

He stress state at a point in a material under plane stress condition is equi-biaxial tension with a magnitude of 10 MPa. If one unit on the σ – π plane is 1 MPa, the Mohr's circle representation of the state-of-stress is given by

Detailed Solution for Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 17

Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 18

The base of a brass bracket needs rough grinding. For this purpose, the most suitable grinding wheel grade specification is

Detailed Solution for Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 18

For brass ‘Silicon carbide’ is the abrasive. As brass is soft material, we need hard wheel.
Therefore ‘Q’ is the best choice.

So, ‘J ’ is in the softer side. So best option is (b).

Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 19

Which of the following function f (z), of the complex variable z , is NOT analytic at all the points of the complex plane?

Detailed Solution for Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 19

logz is not analytic at all points.

Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 20

Multiplication of real valued square matrices of same dimension is

Detailed Solution for Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 20

Matrix multiplication is associative.

*Answer can only contain numeric values
Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 21

A company is hiring to fill four managerial vacancies. The candidates are five men and three women. If every candidate is equally likely to be chosen then the probability that at least one women will be selected is _______ (round off to 2 decimal places).


Detailed Solution for Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 21

5 men, 3 women
P [atleast one women selected for 4 vacancies]
=1 – P [none]

*Answer can only contain numeric values
Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 22

In a concentric tube counter-flow heat exchanger, hot oil enters at 102°C and leaves at 65°C. Cold water enters at 25°C and leaves at 42°C. The log mean temperature difference (LMTD) is _______°C (round off to one decimal place).


Detailed Solution for Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 22

Thi = 102°C, The = 65°C
Tc,i = 25°C, Tce = 42°C

ΔT1 = 102°C – 42°C = 60°C;ΔT2 = 65°C – 25°C = 40°C;

*Answer can only contain numeric values
Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 23

A flywheel is attached to an engine to keep its rotational speed between 100 rad/s and 110 rad/s. If the energy fluctuation in the flywheel between these two speeds is 1.05 kJ then the moment of inertia of the flywheel is _________________kg.m2 (round off to 2 decimal places).


Detailed Solution for Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 23


∴ 1.05 × 103 × 2 = 
I = 1 kg.m2

Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 24

In the Critical Path Method (CPM), the cost-time slope of an activity is given by

*Answer can only contain numeric values
Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 25

A sheet metal with a stock hardness of 250 HRC has to be sheared using a punch and a die having a clearance of 1 mm between them. If the stock hardness of the sheet metal increases to 400 HRC, the clearance between the punch and the die should be_________ mm.


Detailed Solution for Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 25

Tensile strength ∝ Hardness number
∴ Shear strength = 0.5 tensile strength (Tresca theory)
= 0.577 tensile strength (Von mises theory)
Shear strength ∝ Hardness number
and clearance, C = 0.0032t√τ


Or 

Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 26

For an ideal gas, a constant pressure line and a constant volume line intersect at a point, in the Temperature (T) versus specific entropy (s) diagram. CP is the specific heat at constant pressure and CV is the specific heat at constant volume. The ratio of the slopes of the constant pressure and constant volume lines at the point of intersection is

Detailed Solution for Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 26

If
v = C
Tds = du + pdv
Tds = du
du = CVdT   [∵ V = C]
Tds = CVdT

If P = C
Tds = dh – vdP
dh = CPdT  [∵ P = C]
Tds = CPdT

Ratio,

*Answer can only contain numeric values
Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 27

A balanced rigid disc mounted on a rigid rotor has four identical point masses, each of 10 grams, attached to four points on the 100 mm radius circle shown in the figure

The rotor is driven by a motor at uniform angular speed of 10 rad/s. If one of the masses gets detached then the magnitude of the resultant unbalance force on the rotor is ______ N. (round off to 2 decimal places).


Detailed Solution for Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 27


ω = 10 rad/s, r = 100 mm = 0.1 m
If one mass is detached then

Now, unbalance tone, F = mrω2

= 0.1 N

Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 28

A four bar mechanism is shown below.

For the mechanism to be a crank-rocker mechanism, the length of the link PQ can be

Detailed Solution for Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 28


For Crank-Rocker mechanism, shortest link must be crank and adjacent to fixed as well as Grashoff’s law must be satisfied.
If  l = 80 mm
then shortest  will be = 80 mm
as well as (80 + 600) < (400 + 300) 680 < 700
Therefore law is satisfied.
⇒ l = 80 mm

Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 29

The value of 

Detailed Solution for Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 29


Applying ‘L’ Hospital rule

Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) - Question 30

A helical gear with 20° pressure angle and 30° helix angle mounted at the mid-span of a shaft that is supported between two bearings at the ends. The nature of the stresses induced in the shaft is

View more questions
Information about Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) Page
In this test you can find the Exam questions for Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1) solved & explained in the simplest way possible. Besides giving Questions and answers for Past Year Paper - Mechanical Engineering GATE : 2020 (Session - 1), EduRev gives you an ample number of Online tests for practice

Top Courses for Mechanical Engineering

Download as PDF

Top Courses for Mechanical Engineering