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Home » Engineering » Chemical Engineering » Aptitude Test - 2
1.Which of the following is not conserved for the flow of an incompressible liquid in a pipe with variable area?
A. Mass
B. Volume
C. Velocity
D. Mass
2.What is the mass flow rate of a liquid flowing through a pipe of which 100 grams of water was collected in 10 seconds?
A. 0.01 kg/s
B. 0.05 kg/s
C. 0.1 kg/s
D. 0.01 kg/s
3.What is the volumetric flow rate if 100 kg of water is collected in 10 seconds?
A. 0.1 m3/s
B. 0.2 m3/s
C. 0.01 m3/s
D. 0.1 m3/s
4.The velocity of water in a pipe of area 5 m2 is 10 m/s, what will be the flow rate of water?
A. 25 m3/s
B. 50 m3/s
C. 75 m3/s
D. 25 m3/s
5.A liquid of density 0.1 kg/m3 is flowing through a pipe at a rate of 15 kg/s, what will be the area of the pipe if the fluid velocity is 5 m/s?
A. 30 m2
B. 45 m2
C. 75 m2
D. 30 m2
6.10 Kg/s of a fluid with density 10 Kg/m3 is passed into a tank of capacity 50 m3, how much time will it take to fill the tank?
A. 5 Second
B. 50 Second
C. 500 Second
D. 5 Second
7.15 Kg/s of a fluid with density 5 Kg/m3 is passed into a tank of capacity 30 m3, how much time will it take to fill the tank?
A. 3 Second
B. 10 Second
C. 30 Second
D. 3 Second
8.20 Kg/s of a fluid with density 5 Kg/m3 is passed into a tank of capacity 60 m3, how much time will it take to fill the tank?
A. 5 Seconds
B. 10 Seconds
C. 15 Seconds
D. 5 Seconds
9.16 grams of oxygen is passed in the process in 5 minutes, what is the molar flow rate?
A. 0.1 mole/min
B. 1 mole/min
C. 10 mole/min
D. 0.1 mole/min
10.24 grams of CH4 is passed in the process in 3 minutes, what is the molar flow rate?
A. 0.1 mole/min
B. 0.3 mole/min
C. 0.5 mole/min
D. 0.1 mole/min
11.From the concept of kinetic theory, mean travel velocity of the gas molecules is prescribed by the relation?
A. V = (3M/GT) 1/2
B. V = (3GT/M) 1/2
C. V = (6T/GM) 1/2
D. V = (3M/GT) 1/2
12.Low temperature insulation are used when the enclosure is at a temperature lower than the ambient temperature. Which one of the following is not a low temperature insulation?
A. Slag wool
B. Cattle hair
C. Cork
D. Slag wool
13.The value of Lorenz number in 10-8 W ohms/K2 is?
A. 2.45
B. 2.56
C. 2.35
D. 2.45
14.For liquids, thermal conductivity is governed by the relation?
A. k = A c p p8/3/M1/3
B. k = A c p p4/3/M1/3
C. k = 2A c p p4/3/M2/3
D. k = A c p p8/3/M1/3
15.The thermal conductivity and the electrical conductivity of a metal at absolute temperature are related as?
A. k/T
B. k σ/T
C. k/σ
D. k/T
16.The relation Ϫ2 t =0 is referred to as?
A. Laplace equation
B. Solution for transient conduction
C. Fourier heat conduction equation
D. Laplace equation
17.The unit of thermal diffusivity is?
A. m/hr-K
B. m2/hr
C. kcal/m2-hr
D. m/hr-K
18.The diffusion equations?
A. Temperature doesn’t depends on time
B. There is no internal heat generation
C. Steady state conditions prevail
D. Temperature doesn’t depends on time
19.The literature of heat transfer generally recognizes distinct modes of heat transfer. How many modes are there?
A. One
B. Two
C. Three
D. One
20.Unit of the rate of heat transfer is?
A. Watt
B. Pascal
C. Newton
D. Watt
21.Convective heat transfer coefficient doesn’t depend on?
A. Surface area
B. Space
C. Time
D. Surface area
22.The rate equation used to describe the mechanism of convection is called Newton’s law of cooling. So rate of heat flow by convection doesn’t depend on?
A. Convective heat transfer coefficient
B. Surface area through which heat flows
C. Time
D. Convective heat transfer coefficient
23.How many types of convection process are there?
A. One
B. Two
C. Three
D. One
24.Thermal conductivity is maximum for which substance?
A. Ice
B. Diamond
C. Aluminum
D. Ice
25.A radiator in a domestic heating system operates at a surface temperature of 60 degree Celsius. Calculate the heat flux at the surface of the radiator if it behaves as a black body?
A. 697.2 W/m2
B. 786.9 W/m2
C. 324.7 W/m2
D. 697.2 W/m2
26.Which of the following is an example of forced convection?
A. Heat exchange on cold and warm pipes
B. Cooling of billets in the atmosphere
C. Flow of water in condenser tubes
D. Heat exchange on cold and warm pipes
27.Regarding one dimensional heat transfer, choose the correct statement?
A. Steady- f (y, z), Unsteady- f (y)
B. Steady- f (x, y, t), Unsteady- f (x)
C. Steady- f (x, t), Unsteady- f (x)
D. Steady- f (y, z), Unsteady- f (y)
28.Which statement is true regarding steady state condition?
A. There is a variation in temperature in the course of time
B. It is a function of space and time coordinates
C. Heat exchange is constant
D. There is a variation in temperature in the course of time
29.Which of the following is an example of steady state heat transfer?
A. Chilling effect of cold wind on a warm body
B. Electric bulb cools down by the surrounding atmosphere
C. Cooling of I.C engine
D. Chilling effect of cold wind on a warm body
30.Heat transfer in a long, hollow cylinder which is maintained at uniform but different temperatures on its inner and outer surfaces may be assumed to be taking place in which direction?
A. Axial only
B. Unpredictable
C. Radial only
D. Axial only
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