In a fishing vessel propulsion train, the marine reduction-reverse gearbox is installed between the main diesel engine and the propeller shaft.
Primary Purpose:
Directional Control: Engages multi-plate clutches to allow forward, reverse, and neutral propeller shaft rotation while the engine runs continuously in one direction.
Speed Reduction: Steps down high engine crankshaft RPM ($1500-2000\text{ rpm}$) to efficient low propeller speeds ($300-500\text{ rpm}$).
Correct Option: Option 3 (Keeping the forward, reverse and neutral positions).
Explanation not matching this question?क्या व्याख्या इस प्रश्न से मेल नहीं खा रही?Report
8
ICAR JRF Fish Processing Technology 29 Jun 2024Shift 1
MCQ (Single Correct)+4−1
The concentration of iodine solution required in smoked fish plant for hand and equipment sterlization respectively are
Iodophors are complexes of elemental iodine bound to non-ionic surfactants, providing broad-spectrum bactericidal, fungicidal, and virucidal activity.
Prescribed Concentrations:
Hand Dips / Hand Washing: $12.5 - 15\text{ ppm}$ available titratable iodine (safe for frequent skin contact without causing dermatitis).
Equipment and Utensil Sanitation: $25\text{ ppm}$ available iodine (effective sanitizer on cleaned stainless steel and food contact surfaces without requiring a subsequent potable water rinse).
Correct Option: Option 3 (15 and 25 ppm).
Explanation not matching this question?क्या व्याख्या इस प्रश्न से मेल नहीं खा रही?Report
9
ICAR JRF Fish Processing Technology 29 Jun 2024Shift 1
MCQ (Single Correct)+4−1
Smoke is known to have carcinogenic effect due to presence of a compound called as
Carcinogenic Polycyclic Aromatic Hydrocarbons (PAHs) in Smoke:
During wood smoking of fish, thermal pyrolysis of wood lignin and cellulose above $400^\circ\text{C}$ generates Polycyclic Aromatic Hydrocarbons (PAHs).
3,4-Benzopyrene (Benzo[a]pyrene): The most potent carcinogen and mutagen identified among wood smoke components. Food safety regulations strictly limit benzo[a]pyrene in smoked fishery products to $\le 2.0\,\mu\text{g/kg}$ (ppb).
Correct Option: Option 1 (3,4 benzopyrene).
Explanation not matching this question?क्या व्याख्या इस प्रश्न से मेल नहीं खा रही?Report
10
ICAR JRF Fish Processing Technology 29 Jun 2024Shift 1
Nobashi Ebi (Stretched / Elongated Shrimp): A traditional Japanese-style value-added frozen shrimp product prepared from peeled, tail-on (PTO) marine or vannamei shrimp.
Small diagonal incisions (typically 4–5 cuts) are made along the ventral muscle grooves, and the shrimp is gently pressed and stretched straight manually.
This prevents muscle contraction and curling during cooking, making it ideal for breaded/battered shrimp and Tempura preparation.
Correct Option: Option 1 (Nobashi).
Explanation not matching this question?क्या व्याख्या इस प्रश्न से मेल नहीं खा रही?Report
Report Issue / Suggest Correctionत्रुटि रिपोर्ट / संशोधन सुझाव
No official replies published yet for this questionइस प्रश्न पर अभी कोई आधिकारिक समाधान प्रकाशित नहीं है
Have an objection, typo, or doubt? Submit a report in Tab 1. Our subject experts will audit the question and publish the official resolution here.यदि आपको इस प्रश्न या उत्तर कुंजी में कोई आपत्ति है, तो 'त्रुटि रिपोर्ट' टैब से विवरण भेजें। हमारी विषय विशेषज्ञ टीम समीक्षा कर आधिकारिक समाधान प्रकाशित करेगी।