In a four-stroke-cycle diesel engine, how many crankshaft revolutions are required to complete one full operating cycle in each cylinder?
Motor Plants
Question · Hard
What a Safety Data Sheet tells you
Short
What is the primary purpose of scavenging in a two-stroke-cycle marine diesel engine?
A marine diesel engine governor primarily:
Black smoke from a diesel exhaust at normal load most commonly indicates:
On a marine diesel engine, fuel injection timing primarily determines:
Question · Medium
Your heart has these. So do pipes.
A diesel will not roll on starting air even though air-receiver pressure is normal and the air-start distributor appears to work. The most likely cause is that the:
What is the primary function of a turbocharger on a marine diesel engine?
If oil mist is detected in a large diesel crankcase, the recommended immediate action is to:
Cylinder compression ratio is defined as the ratio of:
Lockout/tagout, called like a cup final
A cylinder has a swept volume of 8.0 liters and a clearance volume of 0.5 liters. What is the approximate compression ratio?
Mean effective pressure (MEP) on an indicator card is used primarily to:
Heavy fuel oil for medium-speed diesels is heated primarily to:
What is the principal purpose of the jacket cooling-water system on a marine diesel?
An overspeed trip on a diesel engine is designed to:
Question · Easy
Blue exhaust smoke from a diesel engine most often indicates:
In a diesel fuel-injection system, the delivery valve (constant-pressure valve) primarily:
Crosshead bearings on large two-stroke marine diesels are lubricated primarily by:
A rising jacket-water temperature with falling lube-oil pressure on a running main engine most strongly suggests:
The purpose of a charge-air cooler (intercooler/aftercooler) after a turbocharger is to:
Starting-air receivers for large diesels are typically arranged so that:
If a unit is cut out (fuel rack zeroed) on a multi-cylinder diesel due to a casualty, the engineer should also ensure that:
Cetane number of diesel fuel is a measure of:
A stuck open diesel exhaust valve is most likely to cause:
The main purpose of cylinder oil on a large two-stroke crosshead diesel is to:
During a diesel plant watch, a sudden increase in exhaust temperature on one cylinder with little change on others most likely points to:
Ohm's law states that voltage (E) equals:
Electrical Control
Three resistors of 6 Ω, 6 Ω, and 6 Ω are connected in parallel. The equivalent resistance is:
Two 10 Ω resistors are connected in series across a 24 V supply. Current in the circuit is:
When paralleling an AC generator, the incoming machine should be closed when the synchroscope is near the:
On paralleled AC generators, real power (kW) load sharing is primarily adjusted by:
Reactive power (kVAR) sharing between paralleled generators is primarily controlled by:
A reverse-power relay on an AC generator protects against:
On an ungrounded (insulated) shipboard AC distribution system, a ground-detection system is used to:
The purpose of a transformer is to:
A fully charged lead-acid battery cell has a nominal open-circuit voltage of about:
In a three-phase AC system, line-to-line voltage is related to line-to-neutral (phase) voltage by approximately:
A thermal overload relay on a motor starter primarily protects the motor against:
A variable-frequency drive (VFD) controls AC motor speed primarily by varying:
Power in a DC circuit is calculated as:
A 120 V circuit draws 5 A. The power consumed is:
When taking a generator offline under load, the preferred practice is to:
A diode is a semiconductor device that primarily:
In a basic closed-loop control system, the process variable is compared to the:
A 4–20 mA instrumentation loop is preferred onboard because:
If frequency on a shipboard AC bus is low while voltage is normal, the engineer should primarily:
Loading more…