87
Winter 2014 – 2015 Proceedings
www.uscg.mil/proceedings
Prepared by NMC Engineering
Examination Team
Nautical
Engineering
Queries
Nautical
Engineering
Queries
1. Industrial process and commercial CFC type refrigeration equipment with annual leak rates of 35 percent or more,
require leak repair of the system if it contains a refrigerant charge of more than what quantity?
A. 15 lbs. (6.8 kg)
B. 25 lbs. (11.4 kg)
C. 40 lbs. (18.1 kg)
D. 50 lbs. (22.6 kg)
2. Main condensate recirculating systems are primarily intended to .
A. prevent excessive overheating of the condensate pumps.
B. balance and control condensate temperatures at full load.
C. provide adequate cooling water for the air ejector condensers.
D. vent accumulated vapors from the condensate pump discharge.
3. Fuel combustion in a diesel engine cylinder should begin just before the piston reaches top dead center and should
.
Note: Fuel combustion commences slightly after fuel injection begins and ends slightly after fuel injection ends. The delay at beginning is called
the ignition delay period. The delay at ending is called the afterburning period.
A. end when fuel injection has been completed
B. end at bottom dead center
C. continue through the after-burning period
D. be completed exactly at top dead center
Q
uestions