NEVADA A GENERAL ENGINEERING PRACTICE
EXAM 2026 ACTUAL TEST PAPER WITH FULL
QUESTIONS AND VERIFIED SOLUTIONS
◉ What are the different arrangements of cylinders? Answer: In-line
(can be installed inverted) and horizontally opposed - for up to 4
cylinder engines.
V cylinder arrangement is used to run far more powerful engines of
about 8-12 cylinders. (slimmer package, reduction in drag)
Radial arrangement (bulkier in the front, but effective and lighter)
◉ What is the theoretical cycle on which 4 stroke engines are based
on? Answer: Otto cycle
◉ Distance that the piston moves when it moves btw TDC and BDC?
Degree of movement of crank shaft when this takes place? Answer:
Stroke
TDC - Top Dead Center
BDC - Bottom Dead Center
Degree of movement is 180.
,◉ How many rotations and degrees does the crank shaft cover for
one complete cycle of 4 strokes? Answer: 2 complete rotations and
720 degrees of movement.
◉ Crank throw Answer: Distance btw the center line of the
crankshaft journal and center line of the crank pins.
The offset crank throw determines the piston stroke.
◉ What is the relationship btw Crank throw and Stroke? Answer:
Stroke is twice Crank throw.
◉ Internal diameter of the cylinder Answer: Bore
◉ Ignition, and valve opening and closing, occur at specific points
within the crankshaft rotation, which are designated by number of
degrees that the crankshaft has rotated from top dead centre. True
or False? Answer: True
◉ Where does significant events happen during theoretical Otto
cycle? Answer: At the TDC or BDC
, ◉ Why is the engine called a 'constant volume' engine? Answer:
Because in theory, the piston has stopped and the volume in which
combustion is taking place is constant.
◉ Power stroke Answer: Combustion increases the temperature
within the cylinder dramatically, which in turn increases the
pressure at the top of the piston to rise. Increasing pressure forces
the piston down on the 'power stroke' driving the crankshaft
through yet another 180 degrees to bottom dead center, where the
exhaust valve opens.
◉ Four Strokes Answer: Induction, Compression, Power and
Exhaust.
◉ Why does the inlet valve open before the piston reaching the TDC
and close after having already left the BDC? Answer: To ensure that
there is no delay between the piston moving down and the mixture
flowing into the cylinder.
The momentum of the mixture increases as the induction stroke
proceeds, such that the gases will continue to flow into the cylinder
even though the crankshaft has passed BDC. Closure of the inlet
valve is delayed, up until the pressure within the cylinder is
approximately equal to the mixture pressure in the induction
manifold.
EXAM 2026 ACTUAL TEST PAPER WITH FULL
QUESTIONS AND VERIFIED SOLUTIONS
◉ What are the different arrangements of cylinders? Answer: In-line
(can be installed inverted) and horizontally opposed - for up to 4
cylinder engines.
V cylinder arrangement is used to run far more powerful engines of
about 8-12 cylinders. (slimmer package, reduction in drag)
Radial arrangement (bulkier in the front, but effective and lighter)
◉ What is the theoretical cycle on which 4 stroke engines are based
on? Answer: Otto cycle
◉ Distance that the piston moves when it moves btw TDC and BDC?
Degree of movement of crank shaft when this takes place? Answer:
Stroke
TDC - Top Dead Center
BDC - Bottom Dead Center
Degree of movement is 180.
,◉ How many rotations and degrees does the crank shaft cover for
one complete cycle of 4 strokes? Answer: 2 complete rotations and
720 degrees of movement.
◉ Crank throw Answer: Distance btw the center line of the
crankshaft journal and center line of the crank pins.
The offset crank throw determines the piston stroke.
◉ What is the relationship btw Crank throw and Stroke? Answer:
Stroke is twice Crank throw.
◉ Internal diameter of the cylinder Answer: Bore
◉ Ignition, and valve opening and closing, occur at specific points
within the crankshaft rotation, which are designated by number of
degrees that the crankshaft has rotated from top dead centre. True
or False? Answer: True
◉ Where does significant events happen during theoretical Otto
cycle? Answer: At the TDC or BDC
, ◉ Why is the engine called a 'constant volume' engine? Answer:
Because in theory, the piston has stopped and the volume in which
combustion is taking place is constant.
◉ Power stroke Answer: Combustion increases the temperature
within the cylinder dramatically, which in turn increases the
pressure at the top of the piston to rise. Increasing pressure forces
the piston down on the 'power stroke' driving the crankshaft
through yet another 180 degrees to bottom dead center, where the
exhaust valve opens.
◉ Four Strokes Answer: Induction, Compression, Power and
Exhaust.
◉ Why does the inlet valve open before the piston reaching the TDC
and close after having already left the BDC? Answer: To ensure that
there is no delay between the piston moving down and the mixture
flowing into the cylinder.
The momentum of the mixture increases as the induction stroke
proceeds, such that the gases will continue to flow into the cylinder
even though the crankshaft has passed BDC. Closure of the inlet
valve is delayed, up until the pressure within the cylinder is
approximately equal to the mixture pressure in the induction
manifold.
