Lakshya Education MCQs

  1. Topics
  2. Chemical Engineering
  3. Heat Transfer
Question: Nusselt number is a function of Prandtl number and __________ number of fluid in natural convection heat transfer.
Options:
A.Grashoff
B.Biot
C.Stantan
D.Reynolds
Answer: Option A

Previous Next

Submit Answer & Explaination

Earn Reward Points by submitting Detailed Explaination for this Question

More Questions on This Topic :

Question 1. In a heat exchanger with steam outside the tubes, a liquid gets heated to 45°C, when its flow velocity in the tubes is 2 m/s. If the flow velocity is reduced to 1 m/s, other things remaining the same, the temperature of the exit liquid will be
  1.    Less than 45°C
  2.    More than 45°C
  3.    Equal to 45°C
  4.    Initially decreases and remains constant thereafter
Answer: Option B
Question 2. In forced convection, the Nusselt number is a function of
  1.    Re and Pr
  2.    Re and Gr
  3.    Pr and Gr
  4.    Re and Sc
Answer: Option A
Question 3. The left face of a one dimensional slab of thickness 0.2 m is maintained at 80°C and the right face is exposed to air at 30°C. The thermal conductivity of the slab is 1.2 W/m.K and the heat transfer co-efficient from the right face is 10 W/m².K. At steady state, the temperature of the right face in °C is
  1.    77.2
  2.    71.2
  3.    63.8
  4.    48.7
Answer: Option D
Question 4. What is the unit of thermal conductivity ?
  1.    Kcal/hr. m² °C
  2.    Kcal/hr.m.°C
  3.    Kcal/hr.m
  4.    Kcal/hr. °C
Answer: Option B
Question 5. Multiple effect evaporators are commonly used in the manufacture of P. Paper Q. Superphosphate R. Sugar S. Fats
  1.    P and Q
  2.    P and R
  3.    P and S
  4.    R and S
Answer: Option C
Question 6. In a forward feed multiple effect evaporator unit
  1.    Viscosity of liquid is highest in first effect
  2.    Transfer from effect to effect is done by pumps
  3.    No pump is required to withdraw the product from the last effect
  4.    None of these
Answer: Option D

Check all Questions in this Topic : Click HERE

Recent Questions

Q. Which Of The Following Property Is Used To Give A 3-D Sense ....Q. The Steam Engine Provided On Steam Locomotives Is....Q. During Preventative Maintenance On A Dot Matrix Printer, Do ....Q. Identify The Asset From The Following....Q.  what Is The Multiplicative Inverse Of 1/2 ?....Q. The Raft Slab Is Projected Beyond The Outer Walls Of The Str....Q. If It Is Known That S’s Pet Is U’s Pet’....Q. High Rate Of Heating Of Coke Ovens....Q. The Depletion In Ozone Layer Is Caused By ________ .....Q. Which Of The Following Methods Adds And Connects The Point T....Q. The Rate Equation For The Reaction 2A + B → C Is Foun....Q. The Cash Book Shows A Bank Balance Of Rs. 8,000. On Comparin....Q. If −5<p<−2 And 7<q<9, Then What Is....Q. With Increase In Load, Radiant Superheater Has....Q. Stars Twinkle Because....Q. Pick Up The Incorrect Statement From The Following:....Q. The Additive Inverse Of -55 Is .....Q. The Oath Of Office Is Administered To The Governor By The....Q. Stars Which Appear Single To The Naked Eye But Are Double Wh....Q. According To Mahabharat, Who Was Abhimanyu's Mother?....