Related Questions

Threshold limit value (TLV) i.e., the maximum permissible safe limit of phosgene gas which Hitler used to use to kill his enemies in 'gas chamber' is about __________ ppm.
A [

A.

B. 10-100

B 100-200
C 100-1000
Maximum permissible concentration of copper in drinking water in mg/L is
A 0.01
B 0.05
C 1.0
D 2.0
Maximum permissible concentration of total hardness in drinking water is
A 50
B 100
C 200
D 500
Fill in the gaps : As water passes -----various rocks, calcium fluoride gets in the water.
A of
B with
C on
D none of these
On Dhaka- Sylet highway , 5% of the drives are fined for exceeding the speed limit. However , 80% of the drivers who exceed the speed limit are not fined. What percentage of dirvers on this highway exceed the speed limit?
A 10
B 15
C 20
D 25
Maximum permissible limit of industrial noise as recommended by World Health Organisation (WHO) is __________ decibels.
A 35
B 75
C 95
D 105
Threshold limit value (TLV) means maximum permissible/acceptable concentration. TLV of phosgene in air is about __________ ppm (parts per million).
A 0.002
B 0.2
C 1.2
D 4.8
Endurance limit or fatigue limit is the maximum stress that a member can withstand for an infinite number of load applications without failure when subjected to
A Dynamic loading
B Static loading
C Combined static and dynamic loading
D Completely reversed loading
When shear stress exceeds the permissible limit in a slab, then it is reduced by
A Increasing the depth
B Providing shear reinforcement
C Using high strength steel
D Using thinner bars but more in number
Deficiency of fluoride leads to Which one of the following health problems?
A Tooth caries
B Mottling of tooth
C Bending of bones
D Stiffening of joints

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