Tag: science & technology

In Java, int and float both occupy 4 bytes (32 bits) of memory. Similarly, long and double both occupy 8 bytes (64 bits). Option A is wrong because long is 8 bytes while float is 4 bytes. Option D is wrong because byte is 1 byte while short is 2 bytes.

This question uses a specific classification system for Java methods. Constructors (A) initialize objects. Accessors/getters (D) retrieve private field values. Mutators/setters (C) modify private field values. Behavior methods (E) perform actions or operations. Option B (destructor) is incorrect because Java doesn't have destructors - it uses garbage collection instead.

'Collective' is a control input for helicopters (controls rotor blade pitch collectively), not for fixed-wing airplanes. Airplane primary flight controls are ailerons, elevator, and rudder. Throttle controls power. The collective is specific to rotary-wing aircraft, so the statement is false for airplanes.

Modern commercial aircraft primarily operate with a two-pilot crew in the cockpit (Captain and First Officer). The three-person crew configuration (Flight Engineer) was standard on older aircraft but has been phased out due to advanced automation and modern avionics systems.

During a normal landing, the main landing gear (under the wings) touches down first, followed by the nose gear. This configuration allows for better control, reduces the risk of nose gear damage, and provides natural aerodynamic braking as the aircraft settles. The nose gear is designed to touch down last.

Landing flare is the maneuver where the pilot pitches the aircraft's nose up just before touchdown. This reduces the rate of descent, allows the main wheels to contact the runway gently, and settles the aircraft smoothly. It's a critical skill for smooth landings and is performed in the final seconds before touchdown.

The Attitude Indicator (also called Artificial Horizon) displays the aircraft's orientation relative to the earth's horizon, showing pitch (nose up/down) and roll (bank angle). This directly gives pitch information. The VSI shows vertical speed rate, not absolute pitch. Ground Speed Indicator shows horizontal speed over ground. Altimeter shows altitude, not pitch angle.

The A300-600 ST (Super Transporter), also known as Beluga, has a larger cargo volume than the C-5 Galaxy, Antonov An-124, or A380. The A380 is a passenger aircraft, while the C-5 Galaxy and An-124 are military cargo planes with different capacity profiles than the specialized A300-600ST.

Tetanus is caused by the bacterium Clostridium tetani. The bacteria produce a powerful neurotoxin called tetanospasmin that causes muscle spasms and lockjaw. It is not caused by fungi (A), viruses (B), or insects (D).

A total solar eclipse occurs when the Moon completely covers the Sun. The maximum possible duration at the equator is approximately 7.5 minutes due to the Moon's orbital speed and angular size relative to the Sun. Longer durations would require the Moon to be closer or moving slower than physics permits.