Chemical Engineering Mcqs

The diffusion co-efficient of Ni in Cu at 1000 K is 1.93 × 10-16 m2S-1 and it is 1.94 × 10-14 m2S- 1 at 1200 K. The activation energy (in k. J.mole-1) for the diffusion of Ni in Cu is_________________?

• (A)  130
• (B)  180
• (C)  230
• (D)  250

Answer

Submitted By :Ali Uppal

Sand used to stop the green sand from sticking to the pattern is termed as the ______________ sand?

• (A)  Parting
• (B)  Synthetic
• (C)  Loam
• (D)  Dry

Answer

Submitted By :Ali Uppal

For efficient performance of a blast furnace, the extent of reduction of Wustite (FeO) should be___________________?

• (A)  100% indirect reduction
• (B)  100% direct reduction
• (C)  50-60% indirect reduction
• (D)  30-40% indirect reduction

Answer

Submitted By :Ali Uppal

Tip of the match stick contains a mixture of________________?

• (A)  K + S
• (B)  K + S + K2Cr2O7
• (C)  S + K2Cr2O7 + White P
• (D)  None of these

Answer

Submitted By :Ali Uppal

Internal energy of a gas obeying Van-Der-Waals equation of state, [p + (a/v2)] (V – b) = RT, depends upon its___________________?

• (A)  Pressure & temperature
• (B)  Pressure & specific volume
• (C)  Temperature & specific volume
• (D)  Temperature only

Answer

Submitted By :Ali Uppal

The concentration of (H+) ions is 4 x 10-5 in a solution. Then pH of the solution will be (Given log 4 = 0.6) ?

• (A)  4.4
• (B)  5.6
• (C)  8.4
• (D)  2.4

Answer

Submitted By :Ali Uppal

The swift cup test evaluates the following property of a sheet metal ?

• (A)  Stretchability
• (B)  Drawability
• (C)  Bendability
• (D)  None of these

Answer

Submitted By :Ali Uppal

LVDT used for displacement measurement is a/an _______________ Transducer?

• (A)  Passive
• (B)  Active
• (C)  Capacitive
• (D)  None of these

Answer

Submitted By :Ali Uppal

Cold chisel‟s hammers are made of___________________?

• (A)  High speed steel
• (B)  High carbon steel
• (C)  Forged steel
• (D)  Mild steel

Answer

Submitted By :Ali Uppal

Solidification time of a molten metal in a casting is proportional to (where, V = volume of metal & A = its surface area; in the casting) ?

• (A)  V/A
• (B)  V/A2
• (C)  V2/A
• (D)  V2/A2

Answer

Submitted By :Ali Uppal