Lead is poured into the joint between two ______________ pipes?
A. Mild steel
B. Concrete
C. Cast iron
D. Asbestos cement
Chemical Engineering Basics
The emf of a Deniell cell “Zn | Zn2+ || Cu2+ | Cu” can be increased by_________________?
The emf of a Deniell cell “Zn | Zn2+ || Cu2+ | Cu” can be increased by_________________?
A. Decreasing the surface area of the electrodes
B. Increasing the concentration of zinc sulphate solution
C. Increasing the surface area of the electrodes
D. Increasing the concentration of copper sulphate solution
Which of the following materials does not form adherent oxide film on surface ?
Which of the following materials does not form adherent oxide film on surface ?
A. Copper
B. Nickel
C. Aluminium
D. Gold & silver
In a totally irreversible isothermal expansion process for an ideal gas, ΔE = 0, ΔH = 0. Then ΔQ and ΔS will be_______________?
In a totally irreversible isothermal expansion process for an ideal gas, ΔE = 0, ΔH = 0. Then ΔQ and ΔS will be_______________?
A. ΔQ = 0, ΔS=0
B. ΔQ = 0, ΔS = +ve
C. ΔQ = 0, ΔS = -ve
D. ΔQ = +ve, ΔS= +ve
The most suitable material for die casting is __________________?
The most suitable material for die casting is __________________?
A. Iron
B. Copper
C. Steel
D. Nickel
The heat released by cooling one mole of copper from 400 K to room temperature (300 K) is (assume : Cp of copper is 23 J K-1mole-1) ?
The heat released by cooling one mole of copper from 400 K to room temperature (300 K) is (assume : Cp of copper is 23 J K-1mole-1) ?
A. 2300 J
B. 4600 J
C. 230 J
D. 2.3 × 106 J
______________ wire is never used for making the heating element ?
______________ wire is never used for making the heating element ?
A. Nichrome
B. Kanthal
C. Invar
D. None of these
The kinematic viscosity (in stoke) and the absolute/dynamic viscosity (in poise) are the same for ______________ at room temperature ?
The kinematic viscosity (in stoke) and the absolute/dynamic viscosity (in poise) are the same for ______________ at room temperature ?
A. Air
B. Water
C. Mercury
D. Alcohol
Which of the following is resistant to the action of both heat & chemicals ?
Which of the following is resistant to the action of both heat & chemicals ?
A. Borosilicate glass
B. Silica glass
C. Soda lime glass
D. None of these
For the Stoke’s law to be valid in the case of a falling sphere in a fluid, the_____________________?
For the Stoke’s law to be valid in the case of a falling sphere in a fluid, the_____________________?
A. Reynolds number (based on sphere diameter) should be < 1
B. Flow around the sphere should be in turbulent region
C. Sphere must be metallic
D. Fluid density should be constant