A. Natural
B. Induced
C. Forced
D. Chimney
✅ The correct answer is option A.
Chemical Engineering MCQs
The refrigerant freon-12 is chemically
A. CCl₂F₂
B. CCl₃F
C. CClF₃
D. CCl₄F
✅ The correct answer is option A.
The ratio of mass of a neutron to that of an electron is about 1839. What is the ratio of the mass of a proton to that of an electron?
A. 159
B. 1837
C. 2537
D. 10000
✅ The correct answer is option C.
If the pH value of a solution of sodium chloride is 7; then what will be the pH value of the solution after its electrolysis ?
A. 7
B. < 7
C. > 7
D. 0
✅ The correct answer is option C.
Thermistors are used in __________ devices.
A. Voltage measuring
B. Temperature measuring
C. Temperature compensating
D. Both B & C
✅ The correct answer is option D.
In a titration involving weak acid and strong base, the preferred indicator is
A. Methyl orange
B. Phenolphthalein
C. Ethyl orange
D. Fehling’s solution
✅ The correct answer is option B.
Joining of thin foils is preferred to be done by
A. Gamma rays
B. X-rays
C. Microwaves
D. Gas welding
✅ The correct answer is option C.
Hot working of lead is carried out at
A. 75°C
B. 373°K
C. 150°C
D. Room temperature
✅ The correct answer is option B.
The mechanism which changes the value of manipulated variable in response to the output signal from the control unit is called the
A. Final control element
B. On-off control
C. Floating control action
D. None of these
✅ The correct answer is option A.
The most important function of a washer is to provide bearing area and washers are normally specified by their hole diameters. The diameter of washer as compared to the nut is
A. More
B. Less
C. Same
D. More but less than the diameter of bolt
✅ The correct answer is option A.