Join Us ::

Menu Home Classes GK Engineering Past Papers Current Affairs Technical GAT Subject Programming Medical Papers

Chemical Engineering :: All Aptitude Test ::

Home » Engineering » Chemical Engineering » Aptitude Test - 23
1.Which system of the units is a coherent system of units in mechanics?
A. CGS
B. MKS
C. FPS
D. CGS
2. ML-1T-2 is the dimension of?
A. Force
B. Pressure
C. Momentum
D. Force
3. Dimensional analysis is helpful for?
A. Deriving a possible formula
B. Checking the homogeneity of a physical equation
C. Verification of laws
D. Deriving a possible formula
4. Which equation is not dimensionally correct?
A. E=mc2
B. Vf=Vi+at
C. S=Vt2
D. E=mc2
5.SI unit of coefficient of viscosity is?
A. kg.m.s-1
B. kg.m-1.s-1
C. kg.m.s
D. kg.m.s-1
6. Three students measured length of needle with meter rod and recorded as: (i) 0.2145m (ii) 0.21m (iii) 0.214m. Which one is a correct record?
A. Only (i)
B. Only (ii)
C. Only (iii)
D. Only (i)
7.One light-year is equal to?
A. 9.5×1015m
B. 9.5×1015sec
C. 9.5×1015km
D. 9.5×1015m
8. Absolute uncertainty in a measurement depends upon?
A. The magnitude of the measurement
B. Least count of the instrument
C. The percentage error in the measurement
D. The magnitude of the measurement
9.Desulphurisation of petrol is done in a _____________________?
A. Packed extraction column
B. Rotating disc extractor
C. Bollman extractor
D. Packed extraction column
10.Henry’s law states that the ________________________?
A. Partial pressure of a component over a solution is proportional to its mole fraction in the liquid
B. Vapour pressure is equal to the product of the mole fraction and total pressure
C. Partial pressure of a component over a solution is proportional to the mole fraction in the vapour
D. Partial pressure of a component over a solution is proportional to its mole fraction in the liquid
11.Swenson-Walker crystalliser is a __________________ unit ?
A. Continuous
B. Semi-batch
C. Batch
D. Continuous
12.The change in enthalpy, when a unit quantity of gas is absorbed by relatively large quantity of adsorbent (on which a definite concentration of the adsorbed gas already exists) is termed as the_______
A. . Differential heat of adsorption
B. Integral heat of adsorption
C. Heat of wetting
D. . Differential heat of adsorption
13.Moisture in a solid exerting an equilibrium vapour pressure equal to that of the pure liquid at the same temperature is called the ___________________ moisture ?
A. Unbound
B. Free
C. Critical
D. Unbound
14.For a binary mixture distillation process, the degree of freedom is 2. However, if the pressure is fixed in this process, the number of independent variables in this process will be __________________
A. 1
B. 2
C. 0
D. 1
15.With increase in temperature, the leaching rate increases because of the _____________________?
A. Decreased viscosity of liquid
B. Increased diffusivity
C. Both (a) and (b)
D. Decreased viscosity of liquid
16.Calculation of mass transfer co-efficient is mostly/normally done using ______________ theory?
A. Penetration
B. Film
C. Surface renewal
D. Penetration
17.Relative volatility varies with the concentration of component for an ideal solution. The relative volatility of a binary mixture may be defined as the ratio of vapor pressure of component ‘A’ to
A. Only liquid phase obeys Dalton’s law
B. Only vapor phase follows Raoult’s law
C. Liquid phase obeys Dalton’s law and vapor phase obeys Raoult’s law
D. Only liquid phase obeys Dalton’s law
18.Which one of the following devices is not used for both the absorption as well as the liquidliquid extraction processes ?
A. Plate towers
B. Packed towers
C. Spray towers
D. Plate towers
19.Penetration theory relates the average mass transfer co-efficient (K) with diffusivity D. as____________________?
A. K ∝D1.5
B. K ∝√D
C. K ∝D
D. K ∝D1.5
20.For water-ethanol system, the minimum reflux ratio_____________________?
A. Is computed from the slope of the upper operating line that is tangent to the equilibrium curve
B. Is computed from the intercept of the operating line
C. Is the optimum reflux ratio
D. Is computed from the slope of the upper operating line that is tangent to the equilibrium curve
21.At 750°K and 1 atm, the approximate value of Schmidt number for air is_________________?
A. 1
B. 0.1
C. 0.01
D. 1
22.Polar organic compounds are normally used as separating agents for the azeotropic and extractive distillation. Which of the following is the most important factor to be considered for the choice of th
A. Availability
B. Cost
C. Toxicity
D. Availability
23.What is the degree of freedom of an absorption process in which only one component is transferred between phases ?
A. 2
B. 1
C. 3
D. 2
24.Rayleigh equation applies to _________________ distillation ?
A. Differential
B. Equilibrium
C. Flash
D. Differential
25.In a vapor-liquid contacting equipment, the overall gas phase mass transfer co-efficient (M.T.C), KG is related to individual co-efficients (KG and KL) as ___________________ ?
A. 1/KG = 1/KL + m/KG
B. 1/KG = 1/KG + m/KL
C. KG = 1/KG + m/KL
D. 1/KG = 1/KL + m/KG
26.Which of the following can be calculated theoretically using steam table and Dalton’s law of partial pressure; if the relative humidity and dry bulb temperature of moist air is known ?
A. Humidity ratio
B. Dew point
C. Wet bulb temperature
D. Humidity ratio
27.Steam distillation is used to__________________?
A. Increase the efficiency of separation
B. Avoid thermal decomposition of a component
C. Reduce the number of plates
D. Increase the efficiency of separation
28.Leaching of coarse solid lumps is also termed as _____________________?
A. Dissolution
B. Decoction
C. Percolation
D. Dissolution
29.In Lewis equation, gear tooth is considered as
A. Simply supported beam
B. Cantilever beam
C. Curved beam
D. Simply supported beam
30. According to Lewis equation
A. Pinion is always weaker than gear
B. Pinion is weaker than gear if made of same material
C. Gear is weaker than pinion if made of same material
D. Pinion is always weaker than gear
Related Subjects

Date to Date Current Affairs 2022

PakMCQs.net

Quick Links

GAT Subject



   Computer Science    English Mcqs    Agriculture    

Engineering



   Computer Science    Civil Engineering    

Technical



   Networking    Electronics    Database    

Past Papers



   Model Papers    FPSC Papers    
Our Team | Career | Contact | JoinUs | Privacy Policy | DMC

© 2020-2024 by Pak-MCQs.net All Rights Reserved.

Email: [email protected]