Problem number 11 (B2)
Perform validation speed of movement of the vehicle on the criterion limit braking distance based on the NT security conditions in case of emergency braking. Initial data for calculation to take the embodiment, the number of which coincides with the last digit of the sum of digits of the school code number.
Initial data
The horizontal movement slowing effects on the conditions at the driver atom, m / s2 - 0.13
The rate of major labor movements of the tractor (bulldozer) ahead Vb, m / s:
maximum - 2.14
Minimum - 0.59
Allowable braking distance Sm, m - 1.1
Notes to the problem
1. Valid values \u200b\u200bof the horizontal deceleration (acceleration) are based 7-hour working day from the condition effect on the driver.
2. The upper permissible exposure level for a driver to take AMAX = 0.2 m / s2 - at maximum and minimum speed.

Problem number 10 (B 0)
To calculate the actual light of the established in the territory of the construction site spotlight at a point on the searchlight mast specified in the task distance. Initial data taken according to an embodiment, the number of which coincides with the last digit of the sum of digits of the school code number.
Options
Initial data
Searchlight mast height H, m - 21
The light source lamp with power W - CG-200 1500
Type spotlight PKN 1500-1
The distance from the searchlight of the mast to the calculated point, m, is defined by the following coordinates:
X - 64
U - 30
The lighting in the design point at a rate of E. Lux - 2
The angle of the spotlight Θ, hail - 16
Notes to the problem
1. Draw a design scheme.
2. The calculation can be based on a formula, or using available auxiliary calculation tables.
3. Define:
a) the ratio x / n
b) the coefficients ξ, p and p3;
c) the ratio η
g) to set the relative illumination ε;
e) lighting at the design point and compared with the target.
4. To draw conclusions.

Problem number 12 (B0)
Set the distance from the isotope in which the ability to safely conduct the workshop in defectoscopic work without the screen, as well as to determine the thickness of the protective screen that provides operator safety, working directly with the source of radiation.
Initial data for calculation to take the embodiment, the number of which coincides with the last digit of the sum of digits of the school code number.
Initial data
Gamma-equivalent isotope M • mg eq radium - 230
Opening hours during the week, hours - 36
The maximum energy of β-particle Eβ MeV - 0.3
The shield material - water
Notes to the problem
1. Take a point source of radiation, the decay process is accompanied by β - and γ-radiation.
2. Radiation Safety Standards (NRB-76) a group of critical organs to accept 1, t. E. SDA = 0.05 Gy.
3. The value of quality factor (relative biological effectiveness (RBE) assumed equal to one.
4. Define:
a) a safe distance from the radiation source to the workplace in the absence of screens;
b) the thickness of the shielding to minimize radiation exposure.
5. Make conclusions.
References: [8, 32].