INDUSTRIAL STOICHIOMETRY

Which of the following is not a fundamental unit in the International System of Units (SI)?

• Meter

• Kilogram

• Second

• Liter

Answer explanation

Not a fundamental unit

Which of the following quantities is a derived unit?

• Length

• Force

• Mass

• Time

Which of the following represents the SI unit for temperature?

• Celcius

• Fahrenheit

• Kelvin

• Rankine

Which of the following dimensional equations is incorrect?

• [Force] = [M][L][T]^-2

• [Energy] = [M][L]²[T]^-2

• [Power] = [M][L]²[T]^-3

• [Pressure] = [M][L]¹[T]^-2

Answer explanation

(Pressure = force/area, so dimensions should be [M][L]⁻¹[T]⁻²)

Nano is stand for

  In a dimensionally consistent equation, the dimensions on both sides of the equation must be:

• Different

• same

• Irrelevant

• Constantly changing

What are the dimensions of force?

•  [M][L][T]^-1

•  [M][L][T]^-2

• [M][L]²[T]^-1

• [M][L][T]

Answer explanation

Force = mass × acceleration

=Kg*(m/s^2)

=MLT^-2

Converting 1 bar into Pa is

• 1000 Pa

• 10000 Pa

•  100000 Pa

• 1000000 Pa

The viscosity of water is one  poise . Expressing the viscosity of water in PaS is

• 1.5 PaS
• 2.0 PaS
• 0.1 PaS
• 0.5 PaS

Answer explanation

1 poise = 0.1 Pa·s

The mass velocity of a gas through a duct is 1000 kg/m²·h. Expressing the velocity into lb/ft²·s is:

• 0.0569 lb/ft²·s

• 0.272 lb/ft²·s

• 0.157 lb/ft²·s

• 0.123 lb/ft²·s

Answer explanation

1000kg/m^2h=(1000*(0,3048)^2/(0.4539*3600)