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TARSC > Practice Test > Flashcards

Practice Test Flashcards

1
Q

If weight is measured in pounds and velocity in mph, what are the units of momentum?

A

Lbs - mph

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2
Q

When measuring the departure angle of a vehicle for use in conservation of momentum analysis, the angle would best be determined by?

A

Extending a line from th CM at maximum engagement to separation

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3
Q

The speed change a vehicle experiences in a typical two car collision can be estimated from?

A

The damage the vehicle sustains

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4
Q

The three elements during the “at-crash” phase of a collision are?

A

Initial contact
Maximum engagement
Separation

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5
Q

To determine the post impact declaration distance of a vehicle involved in a collision, you should?

A

Measure the CM path of travel from point of separation to POR

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6
Q

A critical factor in analyzing what type of trajectory path was in a pedestrian versus mid-sized auto collision would be?

A

Height of the pedestrian

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7
Q

What is the least common trajectory for a pedestrian involved in an auto–pedestrian collision?

A

Somersault

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8
Q

In what type of auto-pedestrian collision would you expect to see speed match-up to MOST likely occur?

A

Forward projection

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9
Q

In sudden decompression, shear forces are transmitted to the aorta which usually produces ruptures at the?

A

Fixation sights

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10
Q

In a motorcycle versus vehicle collision in which the rider and passenger are cleanly ejected from the motorcycle, which of the following are true?

A

The passenger will normally travel farther than the rider

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11
Q

Countrecoupe injury is a type of contusion or laceration which occurs when the head is?

A

In motion

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12
Q

Head-on collisions usually transmit _________________ loading forces to the femoral shaft.

A

Axial

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13
Q

Dicing or stellar lacerations are produced by impacts with?

A

Tempered glass side windows

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14
Q

When measuring entry and depature angles for the calculation of velocity using the General Conservation of Momentum Solution Technique, the angles must be measured _________.

A

Counter clockwise from the positive x-axis

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15
Q

A shallow entry angle collision in which the entry angle between the two vehicles is __________.

A

Less than 10 degrees

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16
Q

A standard downsliding motorcycle (no fairings or crash bars) will generate a drag factor range of _____ to _____ on a concrete or asphalt surface.

A

.5 to .7

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17
Q

Which of the following is NOT a condition for using Severy method of determining speed from the damage a motorcycle sustains in a collision?

A

The vehicle struck should be moving with respect to the motorcylce

18
Q

The normal range of drag factors for a pedestrian or motorcyclist rolling, tumbling, and sliding on a paved surface is __________.

A

.8 to 1.2

19
Q

In a collision between two vehicles of similar weight, one vehicle sustains greater damage than the other. The likely reason for the difference in damage would be __________.

A

The strength of the vehicle structure impacted

20
Q

To determine if inhaled carbon monoxide (CO) is a factor in a fatal crash, a __________ test should be requested.

A

Carboxyhemoglobin

21
Q

One reason for the reduced drag factor on large trucks when compared to a passenger car drag factor is __________.

A

Truck Tire compounds are harder

22
Q

When only the trailer axle of a truck-tractor and semi-trailer combination lock up, the rig should ________.

A

Experience trailer swing

23
Q

During a jackknife scenario, the trailer of a truck-tractor and semi-trailer combination will __________.

A

Push from behind towards the articulation point thus accentuating the tractor yaw

24
Q

Horne’s thesis on jackknifing accidents generally states that __________.

A

Empty or light loaded combinations on wet surfaces are more prone to suffer jackknife collisions than loaded combinations

25
Q

Air brake lag time is one reason for __________.

A

Decreased drag factors for large trucks

26
Q

Which factor does not affect the rollover threshold on a large tractor semi-trailer combination

A

Brakes

27
Q

Off tracking in larhe vehicle combinations refers to _________.

A

Movement of the rear trailer axle in reference to the front steer axle

28
Q

The abbreviation “CRASH” stands for ________.

A

CALSPAN Reconstruction of Accident Speeds on the Highway

29
Q

When using the CRASH 3 computer program, the PDOF’s must be collinear within __________.

A

15 degrees

30
Q

According to measuring protocol, induced damage should not be included in the measurement of the length of the damage region when __________.

A

It is in the form of buckling in the roof or side panels and is remote from the contact or direct damage

&

It is superficial contact without displacement

31
Q

Crush measurements for the change in velocity should NORMALLY be taken at _________.

A

The bumper-frame level

32
Q

When adjusting crush measurements for use with CRASH 3 energy equations, you adjust for bowing greater than 4 inches in SIDE IMPACTS by _________.

A

Adding the bowing constant to your field crush measurements

33
Q

For momentum to be conserved in a collision system, the following must be true:

A

No external forces are acting on the system

34
Q

The equation shown is derived for use in what type of collision?

Need equation

A

Central

35
Q

In a large truck versus car collisions, which of the following would be a reason why conservation of momentum should NOT be used to calculate the impact speed of the smaller vehicle?

A

The entry and exit angles of the vehicles normally CANNOT be determined with enough accuracy to ensure accurate speed calculation of the smaller vehicle

36
Q

Another name for Cartsian coordinate system is __________.

A

Orthogonal coordinate system

37
Q

The basic definition of the sine of the central angle in a right triangle is which of the following?

A

The ratio of the side opposite the central angle to the hypotenuse

38
Q

A vector quantity is a quantity that requires _________.

A

Magnitude and direction

39
Q

Force is ________.

A

A vector quantity

40
Q

A collision which has a coefficient of restitution of zero, and in which kinetic energy is not conserved, is an example of what kind of collision?

A

Inelastic

TARSC (3 decks)

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