Pre-test for UV processing lab

The wavelength for UV processing range from 100 nm to.......nm

• 200

• 280

• 320

• 400

UV-C is considered to be germicidal effect to microbial has a wavelenght.....nm

• 100-200

• 200-280

• 280-320

• 320-400

UV radiation in the range of.........nm is lethal to most of micro-organisms, including fungi, yeast, bacteria, viruses, protozoa and algae.

• 100-200

• 200-280

• 250-260

• 280-320

Which sample will not be used in the lab today?

• Apple

• Orange

• Mango

• Pineapple

Which sample will be subjected for to day laboratory?

• Watermelon

• Durain

• Pomelo

• Papaya

All of the given are the treatment for today lab, EXCEP......

• Control

• Heating at72C for 26 sec

• UV at 254nm for 30 min

• Pasteurization at 82C for 2 min

How many militer of the juice will be exposed to UV?

• 50 ml

• 100 ml

• 150 ml

• 200 ml

The distance between sample and light source (laminar flow) is.....

• 10 cm

• 20 cm

• 30 cm

• 40 cm

The monitoring quality measurment must be determined for all food processing techniques, but not apply for some laboratory because of spend time/cost/and easy to contaminate that is......

• Chemical properties

• Physical properties

• Microbiological properties

• Sensory evaluation

All of the given are physico-chemical analysis in this lab, EXCEP.....

• pH

• Brix

• Color

• Aw