Deck 12: Radiant and Electrical Energy

Question 1

Ohmic heating cannot be used for treating proteinaceous foods.

Answer 1

False

Question 2

The latest approval for irradiation occurred in _____ for molluscan shellfish.

A)2012
B)2000
C)2005
D)1997

Answer 2

C

Question 3

Microwaves are generated by a magnetron tube that converts electrical energy at _____.

A)60 cycles/second
B)600 cycles/second
C)6,000 cycles/second
D)60,000 cycles/second

Answer 3

A

Question 4

During irradiation,food comes into contact with radioactive materials.

Question 5

Ionizing radiation and microwaves are invisible energy waves moving through space.

Question 6

The FDA approved the use of irradiation to control E.coli and Salmonella species in _____.

A)molluscan shellfish
B)frozen oysters and clams
C)fresh fruits and vegetables
D)fresh and frozen red meats

Question 7

Scientists have found irradiation to be an uncontrollable and highly unpredictable process.

Question 8

Irradiation is known as a _____ process.

A)cold
B)warm
C)hot
D)frozen

Question 9

Ohmic heating is also referred to as _____ heating.

A)conduction
B)convection
C)electromagnetic
D)Joule

Question 10

_____ uses low-level radiant energy to cook food.

A)Boiling
B)Toasting
C)Baking
D)Simmering

Question 11

Scientists believe that irradiation produces no greater nutrient loss than what occurs in other processing methods such as canning.

Question 12

Microwave energy is reflected by _____.

A)glass
B)metal
C)paper
D)plastic

Question 13

Microwaves generate heat inside a food using water friction.

Question 14

The use of plastic lining prevents foods from heating evenly in a microwave.

Question 15

In the United States,the Food and Drug Administration (FDA)has approved irradiation for eliminating _____ from wheat,potatoes,flour,spices,tea,fruits,and vegetables.

A)abundances of yeasts
B)fungi
C)insects
D)all forms of bacteria

Question 16

Electrical or ohmic heating of foods is a relatively new method for heating and preserving foods.

Question 17

Strawberries that have been irradiated will last _____ in a refrigerator compared to only a few days for untreated berries.

A)up to 8 days
B)as many as 10 days
C)2 to 3 weeks
D)approximately 5 weeks

Question 18

Irradiation can be used with all foods.

Question 19

Ohmic heating's major advantage is that it simultaneously heats solid pieces and liquids in a food.

Question 20

Why is irradiation used in only a few applications even though it has been approved for many uses in more than 35 countries?​

A)Patents on the technology prevent widespread use
B)Consumer concern and the cost of building facilities
C)The extremely limited uses for the technology
D)Known health risks and governmental oversight programs