WorksheetsReview of Physical Chemistry and Food Processing
Total questions: 15
Worksheet time: 3mins
Name
Class
Date
1.
The following are food processing technologies that make the food safe for consumption without heat application, EXCEPT
a)
Extrusion
b)
Freezing
c)
Fermentation
d)
Membrane Filtration
2.
Which of the following conditions satisfies the growth of pathogenic bacteria?
a)
Water activity of below 0.85
b)
Temperature of 5-60 Fahrenheit
c)
pH level of 3.5-7.0
d)
Exposed for more than 4 hours at room temp
3.
It is the oldest food preservation technique.
a)
Smoking
b)
Alcoholic Fermentation
c)
Pickling
d)
Drying
4.
___ or flash pasteurization kills pathogenic bacterial spores by exposing the product at 71-74C for 15-20 seconds.
a)
HTST
b)
Thermization
c)
LTLT
d)
UHT
5.
Vinegar is made by _____ fermentation of ethanol into acetic acid by Acetobacter acetii.
a)
Anaerobic
b)
Aerobic
c)
Microaerobic
d)
Partial Pressure
6.
Smoking is a form of food preservation by exposing it to smoke from burning plant or wood. The following are preservation mechanisms of smoking, EXCEPT
a)
Heat
b)
Chemical
c)
Concentration
d)
Dehydration
7.
You freezed two sets of 1kg of ground pork; at which, one is leaner than the other. Both ground pork has an initial temperature of 5C and are stored in the freezer at the same time. Which ground pork will freeze first?
a)
The more lean ground pork
b)
The less lean ground pork
c)
Both ground pork will freeze at the same time
8.
This unit refers to the amount of heat needed to raise or lower 1F of 1lb of water.
a)
J
b)
Kcal
c)
cal
d)
BTU
9.
An ideal gas at standard pressure, volume, number of moles, and temperature:
a)
0.1 atm
b)
22.4 L
c)
0 K
d)
32 mol
10.
The ideal gas law is the combination of the following laws, EXCEPT
a)
Charles' Law
b)
Avogadro's Law
c)
Dalton's Law
d)
Boyle's Law
11.
"The entropy of the system approaches a constant as temperature approaches absolute zero" refers to which law of thermodynamics?
a)
0th Law
b)
1st Law
c)
2nd Law
d)
3rd Law
12.
Melting of ice is an example of an endothermic reaction. What will be its expected change in enthalpy?
a)
Positive
b)
Negative
c)
Neutral
d)
Di ko po alam hehe
13.
__________ can be expressed in centipoise or gram per cm-sec.
a)
Density
b)
Surface Tension
c)
Viscosity
d)
Consistency
14.
You are preparing a 75% saline solution in preparation for pickling. You have pure salt and a flavored pickle solution with 10% salt. How much pure salt and flavored pickle solution do you need to make the needed 75% saline solution?
Answer is in ratio of pure salt : flavored pickle solution
a)
75 : 25
b)
65 : 25
c)
25 : 65
d)
25 : 75
15.
Where does Sir Jai work?
a)
Greenwich
b)
Yellow Cab
c)
Shakey's
d)
Pizza Hut
100 %
