Sail E0 Webinar

MCQs

Total Questions : 1935 | Page 95 of 194 pages
Question 941.
 
A nozzle is said to be a divergent nozzle
  1.    when the cross-section of the nozzle increases continuously from entrance to exit
  2.    when the cross-section of the nozzle decreases continuously from entrance to exit
  3.    when the cross-section of the nozzle first decreases from entrance to throat and then increases from its throat to exit
  4.    none of the above
 Discuss Question
Answer: Option A. -> when the cross-section of the nozzle increases continuously from entrance to exit


Question 942.


The compounding of turbines is done in order to


  1.    reduce speed of rotor
  2.    improve efficiency
  3.    reduce exit losses
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these


Question 943.
.In an impulse turbine
  1.    the steam is expanded in nozzles only and there is a pressure drop and heat drop
  2.    the steam is expanded both in fixed and moving blades continuously
  3.    the steam is expanded in moving blades only
  4.    the pressure and temperature of steam remains constant
 Discuss Question
Answer: Option A. -> the steam is expanded in nozzles only and there is a pressure drop and heat drop


Question 944.

The purpose of governing in steam turbines is to


  1.    maintain the speed of the turbine
  2.    reduce the effective heat drop
  3.    reheat the steam and improve its quality
  4.    completely balance against end thrust
 Discuss Question
Answer: Option A. -> maintain the speed of the turbine


Question 945.
 
De-Laval turbines are mostly used
  1.    where low speeds are required
  2.    for small power purposes and low speeds
  3.    for large power purposes
  4.    for small power purposes and high speeds
 Discuss Question
Answer: Option D. -> for small power purposes and high speeds


Question 946.

 
The reheat factor depends upon


  1.    initial pressure and superheat
  2.    exit pressure
  3.    turbine stage efficiency
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these


Question 947.
 
The efficiency ratio is the ratio of total useful heat drop to the total isentropic heat drop.
  1.    Agree
  2.    Disagree
 Discuss Question
Answer: Option A. -> Agree


Question 948.
The effect of friction on the flow of steam through a nozzle is to
  1.    decrease the mass flow rate and to increase the wetness of steam
  2.    increase the mass flow rate and to increase the exit temperature
  3.    decrease the mass flow rate and to decrease the wetness of steam
  4.    increase the exit temperature without any effect on mass flow rate
 Discuss Question
Answer: Option C. -> decrease the mass flow rate and to decrease the wetness of steam


Question 949.
 
When the
cross-section of a nozzle first increases from its entrance to throat,
and then decreases from its throat to exit, it is not a
convergent-divergent nozzle.
  1.    Yes
  2.    No
 Discuss Question
Answer: Option A. -> Yes


Question 950.
 
The ratio of the isentropic heat drop to the heat supplied, is called
  1.    reheat factor
  2.    stage efficiency
  3.    internal efficiency
  4.    Rankine efficiency
 Discuss Question
Answer: Option D. -> Rankine efficiency


Latest Videos
Chapter 1 - GLOBAL STEEL SCENARIO & INDIAN STEEL INDUSTRY Part 1 : (13-04-2024) INDUSTRY AND COMPANY AWARENESS (ICA)
Direction Sense Test Part 1 Reasoning (Hindi)
Chapter 1 - RMHP / OHP / OB & BP Part 1 : (14-02-2024) GPOE
Cube & Cuboid Part 1 Reasoning (Hindi)
Data Interpretation (DI) Basic Concept Reasoning (Hindi)
Counting Figures Part 1 Counting Of Straight Lines Reasoning (Hindi)
Sail E0 free webinar Webinars
Real Numbers Part 7 Class 10 Maths
Real Numbers Part 1 Class 10 Maths
Polynomials Part 1 Class 10 Maths

Latest Test Papers

Pie Chart - Test Paper 1 Data Interpretation Reasoning & DI
Tabulation - Test Paper 2 Data Interpretation Reasoning & DI
Test Paper 1 Direction Sense Test Reasoning & DI
ICA , RDIC,GFM Free Modal Test Paper - Non - Technical Branch Old Syllabus 2022 - SAIL Junior Officer E0
GFM Combined 1 Free Revision Test SAIL JO E-0