Comp 4 part 2
Mechanical Engineering Quiz: Test Your Knowledge
Welcome to the Mechanical Engineering Quiz! This quiz consists of 50 challenging questions designed to assess your understanding of various components and systems found in mechanical and refrigeration engineering. Whether you are a student, professional, or just someone interested in expanding your knowledge, this quiz is for you!
Key Features:
- 50 carefully crafted questions
- Multiple choice format for easy answering
- Immediate feedback on your responses
Almost all solenoid valves are actuated by?
A spring
The force of gravity
Refrigerant pressure
An electromagnet
Which of the following components is the primary component is the primary shaft emerging out of the engine ? It directly receives the rotational motion from the crankshaft and rotates at the maximum velocity in high speed engine.
Propeller shaft
Intermediate shaft
Thrust shaft
Tail shaft
In a centrifugal pump the seal piping directs liquid from the discharge side of the pump to the
Packing gland
Lantern ring
Wearing ring
Stuffing
Operating a rotary gear pump far below its rated speed when handling low viscosity will cause its volumetric efficiency to?
Remain unchanged due to its positive displacement characteristic
Fluctuate to the amount of slip vibration
Decrease to where the pump no longer develops flow
Increase steadily as the moving gears develop vibration
Distortion of the spray pattern of a nozzle or injector maybe indicated by an
Overboard of the particular cylinder
Smoky exhaust
High firing pressure
Cooling water temperature rise
It is possible to mount a double suction centrifugal pump imperller with the vanes facing the wrong direction. This would cause the pump__.
Slippage to decrease
Head capacity to improve
Discharge to be reversed
Efficiency to decrease
the correct radial clearance between the rotor and the casing a propulsion turbine are maintained by turbine____.
Interstage packing
Diaphragms
Journal bearing
Thrust bearing
Feedwater supplied to flash type distilling plant will flash to vapor in the first-stage due to?
Flash chamber pressure being lower than the saturation pressure corresponding to the feedwater temperature
Temperature being higher than the evaporator temperature of the supplied feedwater
Heat exchanger surfaces being directly in the path of the entering feedwater
Orifices finely atomizing the heated feedwater
The measured temp. Indicate the ?
Total heat of substance
Rate of heat transfer from one substance to another
Level of heat intensity
Total heat contained in the system
An axial pisto, variable stroke pump is used in a vessels hydraulic steering gear. Under pressure oil continually leaks out from between the valve plate/cylinder barreland will____.
Cause loss of hydraulic oil from the system
Cause damage to the pump if not continually drained from the pump casing
Result in extreme damage to the pump
Result in the system high side pressure to substantially drop off
The dehydrator of a refrigeration system is located ?
After evaporator
Before liquid receiver
Before expansion valve
After oil separator
Which of the following components are directly connected to the propellers and lies mainly encased in the stern tube?
Tail shaft
Intermediate shaft
Thrust shaft
Propeller shaft
In the diesel engine an integral liner is one in which the cooling water____.
Neither touches the other side of the liner or flows through the cylinder liner jacket
Flows through the cylinder liner jacket
Flows through the cylinder liner jacket and touches the other side
Touches the other side of liner
You observed an efficiency drop caused by compressor fouling of the gas turbine. What is the most effective counter measure to carry out?>
Turbine washing
Off-line washing
On-line washing
Compressor washing
The degree of fuel atomization in diesel engine cylinder depends primarily on____.
The size of the holes in fuel nozzle
Shape of the combustion chamber
Timing of the pump
Supply pressure to the pump
The operation of a thermostatic steam trap depends upon the ?
Action of float within a chamber
Change in the amount of vapor produced within an enclosed chamber
Difference in movement to two dissimilar bimetallic strips not fastened together
Fact that hot water under pressure
Where can you find the refrigerant sight glass of multi-box refrigeration system?
After the receiver in the liquids line
Before the compressor in suction line
After condenser
After compressor
When the hydraulic control lever for a deck winch is place in the neutral or off position, the spring set break on the fluid motor drive shaft is ____.
Released by spring action and hydraulically locks the winch
Engage spring action and insured to be locked in place by hydarulic pressure
Engage by spring action and only released by hydraulic pressure
The function of centrifugal double volute casing is to?
Reduce hydraulic end thrust
Reduce radial thrust on the impeller
Double the liquid velocity
Provide the effect of muti-staging
Short cycling of a refrigeration compressor refers to>?
Running too slow
Frequently starting and stopping
Frequently grounding out
Running too fast
Every automated machinery plant must have an engineers asssistance alarm? Power of this alarm should be taken from the _____.
Stby generator
General alarm power supply
Main bus
Emergency bus
If you hear a cracking sound coming from a salt water centrifugal pump casing the most probable cause of the noise would be ?
Excessive suction lift
Reversed pump rotation
Insufficient packing
A change in degree of fuel atomization in a diesel engine cylinder has the greatest effect on the___?
Cylinder air turbulance
Fuel spray angle
Fuel injection rate
Combustion in that cylinder
Through which part of the air register assembly does the largest quantity of air passes through?
Atomizer assembly
Diffuser or impeller
Stationary air foil or bladed cone
As found in a basic pneumatic automatic combustion control system the function of standarazing relay is to?
Introduce a control for maintaining constant steam pressure regardless of boiler load
Control the boiler water level
Provide a back up means for manual control
A loud clicking noise occuring from within the valve compartment of an operating diesel engine would indicate ?
Worn valve seats
Tight rocker arm spring
Weak rocker arm springs
Excessive valve clearance
A badly leaking refrigeration compressor discharge valves will cause?
Overspeeding of the expansion valve
Damage to the condenser
Flooding of the receiver
Constant running of the compressor
If it is necessary to clean the spray holes of fuel injector in a diesel engine which of the following is to be used
Carbon solvent
Gasoline
Strong detergent
Nozzle diaphragms are installed in pressure-compounded impulse turbines to___.
Support moving bladed
Hold the nozzle of the stage and admit steam to moving blades
Eliminate blade and nozzle
Part of refrigeration system reduces the pressure of a liquid refrigerant ?
Reefer compressor
Tube condenser
Expansion valve
In the fuel oil burn having a standard mechanical atomizer the fuel and air are mixed as the fuel leaves the?
Evaporator rcoil
Annular slots
Oil passage
Orifice
What is the use of follow-up gear on the electro-hydraulic steering gear?
Sychronizes wheel position with the rudder position
Returns the ruder to mid position when wheel is released
Takes the pump off stroke when the desired redder angle is attained
While overhauling a jerk-type pump and the pump plunger must be replaced. What other part must also be replaced?
Pump barrel
Fuel nozzle
Delivery check valve
Why is thin tipping design procedure is used in modern reaction turbine?
Allow for axial expansion
Increase blade strength and rigidity
Reduce tip leakage
What precaution should be observed to prevent damage of the service pump when warming up the fuel system to the boiler is to>/
Heat the fuel atomizing temperature in the settling tank
Close the recirculating valve when atomizing temperature is reached
Bypass the fuel from the meter
Drain all waters in the settling tank
Which combination of the main shaft segments listed below that are located furthest from the main engine are connected by the inboard stern tube shaft coupling?
Stern tube and tail shaft
Line shaft and stern tube shaft
Thrust shaft and stern tube shaft
Excessive scale formation in a distilling plant may result from?
Improper vacuum regulation
Reduced evaporation capacity
Poor distillate pump
Low brine concentration
Boiler safety valves are set not to go above maximum operating pressure of higher than?
0.15
0.1
0.05
0.2
An excessive pressure differential across a lube oil strainer could indicate the ?
Upside down strainer needs cleaning
Relief valve is stuck up
Relief valve is stuck closed
Strainer installed inverted
Reduced capacity, vibration and noise at the centrifugal pump suction due to vapor pockets in the fluid being pumped is caused by___.
Fluid friction
Cavitation
Steam knock
Water hammer
For proper combustion where the ratio of fuel and air is necessary, the term stoichimetric mixture mean?
More fuel, less airA
Right amount of air and fuel
More air less fuel
Equal amount of air and fuel
Cylinder wear may take place as a product of mechanical wear, corrosion and combustion which is hard to remove?
Abrasion
Adhesion
Corrosion
Friction wear
What is the purpose of maintaining an electrical lamp inside the boiler during a dry preservation method"?
To be used in checking visible leaks
To accelerate the drying process
To prevent air and moisture from entering the boiler
What is the meaning of static suction head of a pump?
Distance of the suction liquid level above the center line of the pump
Force necessary to overcome frictional losses in the pump and piping
Distance the suction liquid level is below the center line of the pump
If the fixed orifice in the evaporator steam supply line were to be removed, the steam pressure reducing valve located upstream would____.
Be unable to maintain steam flow unless the proper range spring were to be installed
Handle the operation satisfactory as the control orifice develops an impedance to steam flow
Still function normally, but the safety interlock will not function
The dimension of the thinnest hydrodynamic film developed within a full journal bearing, when all other factors remain constant, depend upon the?
Dielectric strength of the lubricant
Pour point of the lubricant
Fluidity of the lubricant
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