UPPSC Lec'21 ME: Daily Practices Quiz. 16-Dec-2021 |_00.1
Engineering Jobs   »   Mechincal Engineering quizs   »   UPPSC Lecturer Recruitment 2021, UPPSC Lecturer...

UPPSC Lec’21 ME: Daily Practices Quiz. 16-Dec-2021

Quiz: Mechanical Engineering
Exam: UPPSC AE/Lecturer
Topic: Miscellaneous

Each question carries 3 marks
Negative marking: 1 mark
Time: 8 Minutes

Q1. Match List-I (Process index ‘n’) with List-II (T-s traces) and select the correct answer using the code given below the lists
List I
A. 0
B. 1.0
C. 1.4
D. ∞
List II

UPPSC Lec'21 ME: Daily Practices Quiz. 16-Dec-2021 |_40.1
Codes
A B C d
(a) 3 1 4 2
(b) 2 1 4 3
(c) 3 4 1 2
(d) 2 4 1 3

Q2. Match List-I with List-II and select the correct answer using the codes given below the lists:
List I
Work done in a polytropic process
Work done in steady flow process
Heat transfer in a reversible adiabatic process
Work done in an isentropic process
List- II
-∫▒Vdp
Zero
(p_1 V_1-p_2 V_2)/(γ-1)
4. (p_1 V_1-p_2 V_2)/(n-1)
Codes
A B C D
(a) 4 1 3 2
(b) 1 4 2 3
(c) 4 1 2 3
(d) 1 2 3 4

Q3. In an elliptic trammel, the length of the link connecting the two sliders is 100 mm. The tracing pen is placed on 150 mm extension of this link. The major and minor axes of the ellipse traced by the mechanism would be
(a) 250 mm and 150 mm
(b) 250 mm and 100 mm
(c) 500 mm and 300 mm
(d) 500 mm and 200 mm

Q4. In a crank and slotted lever quick return motion mechanism, the distance between the fixed centres is 160 mm and the driving crank is 80 mm long. The ratio of time taken by cutting and return strokes is
(a) 0.5
(b) 1
(c) 1.5
(d) 2

Q5. The problem of interference in involute profile gears can be overcome by which one of the following means?
(a) Decreasing the centre distance
(b) Using composite profile with cycloidal curve at the root of the tooth
(c) Using sub teeth of height more than the full depth teeth
(d) Proper lubrication

Q6. The flywheel of a steam engine has a radius of gyration of 1 m and mass 2000 kg. The starting torque of the engine is 2000 N-m. The kinetic energy of the flywheel after 10 seconds from start is
(a) 75 kN-m
(b) 100 kN-m
(c) 125 kN-m
(d) 150 kN-m

Solutions

S1. Ans.(c)
Sol.

UPPSC Lec'21 ME: Daily Practices Quiz. 16-Dec-2021 |_50.1

S2. Ans.(c)
Sol.
A. Work done in a polytropic process: (p_1 V_1-p_2 V_2)/(n-1)
B. Work done in steady flow process -∫▒Vdp
C. Heat transfer in a reversible adiabatic process: zero
D. Work done is an isentropic process: (p_1 V_1-p_2 V_2)/(γ-1)

S3. Ans.(c)
Sol.
UPPSC Lec'21 ME: Daily Practices Quiz. 16-Dec-2021 |_60.1
Semi major axis
= AC = AB + BC = 250 mm
Semi minor axis
= BC = 150 mm
Major axis = 250 × 2 = 500 mm
Minor axis = 150 × 2 = 300 mm

S4. Ans.(d)
Sol.
UPPSC Lec'21 ME: Daily Practices Quiz. 16-Dec-2021 |_70.1

cos β/2=80/160=1/2
β=120°
θ=240°
Hence, θ/β=(Time taken by cutting stroke)/(Time taken by return stroke)
=240/120=2

S5. Ans.(b)
Sol.

S6. Ans.(b)
Sol.
I = mk² = 2000 × (1)²= 2000
T= 2000 Nm
T = Iα
2000 = 2000 × α
α = 1 rad/s²
After 10 sec,
ω = ω0 + at = 0t + 1 × 10 = 10 rad/s
E=1/2 Iω^2=1/2×2000×10
=10^5=100 kNm

Sharing is caring!

Published by VINAYAK KUMAR

Graduated from BIT Sindri, Postgraduated from IIT BHU Varanasi

×

Download success!

Thanks for downloading the guide. For similar guides, free study material, quizzes, videos and job alerts you can download the Adda247 app from play store.

Thank You, Your details have been submitted we will get back to you.
Was this page helpful?

Leave a comment

Your email address will not be published. Required fields are marked *

Join India's largest learning destination

What You Will get ?

  • Job Alerts
  • Daily Quizzes
  • Subject-Wise Quizzes
  • Current Affairs
  • Previous year question papers
  • Doubt Solving session

Login

OR

Forgot Password?

Join India's largest learning destination

What You Will get ?

  • Job Alerts
  • Daily Quizzes
  • Subject-Wise Quizzes
  • Current Affairs
  • Previous year question papers
  • Doubt Solving session

Sign Up

OR
Join India's largest learning destination

What You Will get ?

  • Job Alerts
  • Daily Quizzes
  • Subject-Wise Quizzes
  • Current Affairs
  • Previous year question papers
  • Doubt Solving session

Forgot Password

Enter the email address associated with your account, and we'll email you an OTP to verify it's you.


Join India's largest learning destination

What You Will get ?

  • Job Alerts
  • Daily Quizzes
  • Subject-Wise Quizzes
  • Current Affairs
  • Previous year question papers
  • Doubt Solving session

Enter OTP

Please enter the OTP sent to
/6


Did not recive OTP?

Resend in 60s

Join India's largest learning destination

What You Will get ?

  • Job Alerts
  • Daily Quizzes
  • Subject-Wise Quizzes
  • Current Affairs
  • Previous year question papers
  • Doubt Solving session

Change Password



Join India's largest learning destination

What You Will get ?

  • Job Alerts
  • Daily Quizzes
  • Subject-Wise Quizzes
  • Current Affairs
  • Previous year question papers
  • Doubt Solving session

Almost there

Please enter your phone no. to proceed
+91

Join India's largest learning destination

What You Will get ?

  • Job Alerts
  • Daily Quizzes
  • Subject-Wise Quizzes
  • Current Affairs
  • Previous year question papers
  • Doubt Solving session

Enter OTP

Please enter the OTP sent to Edit Number


Did not recive OTP?

Resend 60

By skipping this step you will not recieve any free content avalaible on adda247, also you will miss onto notification and job alerts

Are you sure you want to skip this step?

By skipping this step you will not recieve any free content avalaible on adda247, also you will miss onto notification and job alerts

Are you sure you want to skip this step?