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In a concave mirror, a light ray passing through the focal point will be reflected
- through the midpoint.
- toward the focal point
- parallel to the axis.
it is parallel to axis or it is on the axis.? why not through the focal point or on the center line of the mirror?
If, with a concave mirror the image is placed beyond the centre of curvature, the image produced will be
- virtual, erect and larger.
- real, inverted and smaller.
- real, inverted and enlarged.
WRONG QUESTION OBJECT NOT IMAGE
Ignoring friction, if you let an object slide down a slope, at the bottom
- the potential energy is equal to the kinetic energy.
- the potential energy is more than the kinetic energy.
- the kinetic energy is more than the potential energy.
CAN YOU PLEASE EXPLAIN HOW?
What is the ratio of 5 feet to 30 inches?
- 1 : 6
- 5 : 3
- 2 : 1
How can I do that??
A cuboid has dimensions of 4 cm, 6 cm and 12 cm. What is its volume?
- 0.000288 m3
- 0.028 m3
- 2.88 m3
I don't understand the passage from cm to m^3
A car travels 24 miles in 45 minutes. What is its average speed?
- 18 mph.
- 32 mph.
- 36 mph.
How can i do that?
The steepest slope permitted on the scarf of a scarfed plywood repair is
- 1 in 20.
- 1 in 4.
- 1 in 12.
I don't understand what is a scarf of a scarfed plywood
The intermediate gearbox is
- an epicyclic gearbox.
- a bevel gearbox.
- a reduction gearbox.
It's a bevel gearbox
Aircraft components require overhauls at times stated in the
- maintenance schedule.
- overhaul manual.
- maintenance manual.
Must be maintenance schedule as maintenance manual has only procedure not time limits.
The following factors increase stall speed:
- A higher weight, selecting a higher flap setting, a forward c.g. shift.
- An increase in load factor, a forward c.g. shift, decrease in thrust.
- A lower weight, decreasing bank angle, a smaller flap setting.
Not clear answer, why reducing the trust increasing stall speed?
When an aircraft is heading due north (magnetic) towards a VOR station the reference and variable signals will be
- 270 degrees out of phase.
- in phase.
- 180 degrees out of phase.
Could you explain this question or send any link in internet, please.
What is the main purpose of a frise aileron?
- Increase drag on the up going wing.
- Decrease drag on the up going wing.
- Help pilot overcome aerodynamic loads.
Not correct answer. http://avstop.com/ac/flighttrainghandbook/differential.html:
The design of the aileron surface itself has also been improved by the "Frise type" aileron. With this type of aileron, when pressure on the control stick or wheel is applied to one side, raising one of the ailerons, the leading edge of that aileron (which has an offset hinge) projects down into the airflow and creates drag. This helps equalize the drag created by the lowered aileron on the opposite wing and thus reduces adverse yaw (Fig. 4-5).
An increase in aspect ratio will
- cause VbaseMD to be increased.
- cause induced drag to increase.
- cause VbaseMD to be reduced.
Hello. What is VbaseMD?
Brownian Movement describes
- the bonding of molecules.
- the fission of molecules.
- the motion of molecules.
Analyse brownian movement
The autothrottle controls the aircraft
- vertically
- laterally
- both later ally and vertically
Please explain
When an open pipe is played and a note is heard
- the lowest frequency of the note is called second harmonic.
- resonance occurs with standing waves set up inside the pipe.
- the fundamental frequency is always twice the pipe diameter.
please explain.
A good refrigerant has
- high condensing pressure, low evaporating temperature.
- high condensing pressure, high vaporating temperature.
- low condensing pressure, low vaporating temperature.
will you please explain the reason??
The length of a resonant antenna dipole is
- lambda
- lambda/2
- lambda/4
Q897) The length of a resonant antenna dipole is -lambda/2
Q955) The length of a resonant antenna dipole is -Lambda/4
There can only be one answer? I think - Lambda/4
Any ideas?
Medium vibration of 4 to 6 times per revolution is experienced on a helicopter. The primary control method is
- inspect loose fixtures and fittings
- design of engine and gearbox supports
- inspect main rotor head and main drive shaft
I selected
-Design of engine and gearbox supports
Medium and High frequency Vibrations – Depending on the helicopter the source may be engine and transmission cooling fan and accessories such as air conditioner compressors, or driveline components.
Any ideas?
A circuit has a resistance of 50 ohms and an inductance of 0.2 Henry. If it is connected to a 200 volt 50 Hz supply the reactance will be
- 31.42 ohms.
- 62.84 ohms.
- 6.284 ohms.
help ?
A capacitor is a barrier to
- both.
- A.C.
- D.C.
help plz sos ;)
Due to the change in lift coefficient accompanying extension of the flaps, to maintain the lift constant it would be necessary to
- raise the nose.
- lower the nose.
- keep pitch attitude constant.
Explain please
MS20426AD-6-5 indicates a countersunk rivet which has
- a shank length of 5/16 inch (excluding head).
- an overall length of 5/16 inch.
- a shank length of 5/32 inch (excluding head).
plz teach me how ?
What happens when you break the "chain of error"?
- The accident still occurs.
- The report gets submitted.
- Accident does not happen.
how?
The characteristic of Log 0.698 is
- -2.
- -1.
- 1.
who is characteristic is calculated ...i am little bit confused..??