Quiz (Chap 1 - Chap 2)

All physical quantities given below are derived quantity, EXCEPT

• Acceleration.

• Density.

• Electric current.

• Mass fraction.

Convert an enthalpy value of 2475 BTU/lb_m to kJ/kg. Use the following conversion factors:1 BTU= 0.252154 kcal ; 1 kcal = 4.184 kJ ; 1 Ib = 0.4536 kg

• 575.674 kJ/kg

• 5756.74 kJ/kg

• 57567.4 kJ/kg

• 575674 kJ/kg

State the SI unit of specific heat capacity.

• J kg^-1

• J °C^-1

• J kg °C

• J kg^-1 °C^-1

Identify which one of the following is not equivalent to 2.50 miles. (1 mi = 1.609 km = 5280 ft =1760 yard, 1 ft = 12 in.)

• 1.32 × 10⁴ ft.

• 1.58 × 10⁵ in.

• 4.02 × 10³ km.

• 4.40 × 10³ yd.

If 1 inch = 2.54 cm, and 1 yd = 36 in., calculate how many meters are in 7.00 yd.

• 6.40 m.

• 36.3 m.

• 640 m.

• 1.78 × 10³ m.

Convert the density value of 60 lb_m /ft³ to kg/m³. Given: 1 Ib =0.4536 kg ; 1 ft = 12 in ; 1 in = 0.0254 m

• 96.1696 kg/m³.

• 961.696 kg/m³.

• 9616.96 kg/m³.

• 96169.6 kg/m³.

A 1 kg of wet food product contains of 90% water. After drying process, it is found that 55% of original water has been removed. How much water that removed from this wet food?

• 0.495 kg

• 0.55 kg

• 0.90 kg

• 1.045 kg

Certain amount of chicken meat, chicken fat and water should be mixed to produce 50 kg chicken burger. The compositions of chicken meat, chicken fat and chicken burger are given as follows:

Chicken meat: 10% fat, 65% water, 25% solid non-fat

Chicken fat : 95% fat, 4% water, 1% solid non-fat

Burger : 30% fat, 60% water, 10% solid non-fat

By using the symbol M for chicken meat, F for chicken fat, B for chicken burger and W for water, identify the fat balance equation for this process based on the composition given above.

• 0.1M + 0.95F = 50

• 0.1M + 0.95F + W = 50

• 0.1M + 0.95F + W = 15

• 0.1M + 0.95F = 15

Find the amount (kg) of a solution containing 30% H₂SO₄ that can be obtained by diluting

20 kg of 45% H₂SO₄ solution together with water.

• 10 kg

• 20 kg

• 30 kg

• 50 kg

One big bottle of lemon juice is prepared by adding 5.0 kg fresh lemon juice, 2.5 kg sugar and 7.0 kg ice cubes to 10.0 kg water. Find the concentration of sugar in this bottle as a percentage of weight fraction.

• 0.102 %

• 0.204 %

• 10.20 %

• 20.41 %