Questions and answers for exam Preparation

MCQs

Total Questions : 43 | Page 1 of 5 pages

Question 1. In the field determination, pumping must continue at a ________

uniform rate for sufficient time to approach steady state
non- uniform rate for sufficient time to approach steady state
uniform rate until just before time to approach steady state
non-uniform rate until just before time to approach steady state

Discuss Question

Answer: Option A. -> uniform rate for sufficient time to approach steady state
Answer: (a).uniform rate for sufficient time to approach steady state

Question 2. The coefficient of permeability by Packer for length greater than ten times the radius test is given by ________

\(k=\frac{q}{2πh}log_{10} \frac{L}{r}\)
\(k=\frac{v}{2πLh}log_{10} \frac{L}{r}\)
\(k=\frac{q}{2Lh}log_{10} \frac{L}{r}\)
\(k=\frac{q}{2πLh}log_{10} \frac{L}{r}\)

Discuss Question

Answer: Option A. -> \(k=\frac{q}{2πh}log_{10} \frac{L}{r}\)
Answer: (a).\(k=\frac{q}{2πh}log_{10} \frac{L}{r}\)

Question 3. The U.S. Bureau of Reclamation (Earth manual 1960) has devised two types of pumping-in tests _________

open-end test and packer test
permeability test and radio test
dupin test and influence test
falling head and constant head permeability test

Discuss Question

Answer: Option A. -> open-end test and packer test
Answer: (a).open-end test and packer test

Question 4. The formula for the open-end test is given by _________

\(k=\frac{q}{5.5rh} \)
\(k=\frac{5.5rh}{q} \)
\(k=\frac{q}{5rh} \)
\(k=\frac{q}{0.5rh} \)

Discuss Question

Answer: Option A. -> \(k=\frac{q}{5.5rh} \)
Answer: (a).\(k=\frac{q}{5.5rh} \)

Question 5. The coefficient of permeability by Packer for length in the range 10r > L ≥r test is given by ________

\(k=\frac{q}{2πh}log_{10} \frac{L}{r} \)
\(k=\frac{q}{2πLh}log_{10} \frac{L}{r} \)
\(k=\frac{q}{2Lh}log_{10} \frac{L}{r} \)
\(k=\frac{q}{2πLh}sinh^{-1}\frac{L}{2r} \)

Discuss Question

Answer: Option D. -> \(k=\frac{q}{2πLh}sinh^{-1}\frac{L}{2r} \)
Answer: (d).\(k=\frac{q}{2πLh}sinh^{-1}\frac{L}{2r} \)

Question 6. When two wells are situated near each other, the discharge in individual well is ________

increased
decreased
not effected
remains same with respect to each other

Discuss Question

Answer: Option B. -> decreased
Answer: (b).decreased

Question 7. The discharge for drawdown of well is given by _______

\(q=\frac{2πkb(H-h)}{log_{10}\frac{R}{r}}\)
\(q=\frac{2πkb(H-h)}{log_e\frac{r}{R}}\)
\(q=\frac{2πkb(H-h)}{log_e\frac{R}{r}}\)
\(q=\frac{kb(H-h)}{log_e\frac{R}{r}}\)

Discuss Question

Answer: Option C. -> \(q=\frac{2πkb(H-h)}{log_e\frac{R}{r}}\)
Answer: (c).\(q=\frac{2πkb(H-h)}{log_e\frac{R}{r}}\)

Question 8. The formula for discharge for two wells at distance B is given by ____________

\(q_1=q_2=\frac{2πkb(H-h)}{log_e \frac{R^2}{rB}} \)
\(q_1=q_2=\frac{2πkb(H-h)B}{log_e \frac{r}{R}}\)
\(q_1=q_2=\frac{2πkb(H-h)}{log_e \frac{RB}{r}}\)
\(q_1=q_2=\frac{kb(H-h)}{log_e \frac{R}{rB}} \)

Discuss Question

Answer: Option A. -> \(q_1=q_2=\frac{2πkb(H-h)}{log_e \frac{R^2}{rB}} \)
Answer: (a).\(q_1=q_2=\frac{2πkb(H-h)}{log_e \frac{R^2}{rB}} \)

Question 9. Two tube wells of 20cm diameter each are 100m apart. The coefficient of permeability is 4.15*10¯⁴ m/s, drawdown is 4m and aquifer is 30m thick. If radius of influence is 245m, what is the discharge in each well?

0.033 m³/s
0.040 m³/s
0.036 m³/s
0.042 m³/s

Discuss Question

Answer: Option C. -> 0.036 m³/s
Answer: (c).0.036 m³/s

Question 10. The formula for discharge for three wells forming an equilateral triangle at distance B on side is given by ____________

\(q_1=q_2=q_3= \frac{2πkb(H-h)}{log_e \frac{R^2}{rB}} \)
\(q_1=q_2=q_3= \frac{2πkb(H-h)}{log_e \frac{R^3}{rB^2}}\)
\(q_1=q_2=q_3= \frac{2πkb(H-h)}{log_e \frac{RB}{r}}\)
\(q_1=q_2=q_3= \frac{kb(H-h)}{log_e \frac{R}{rB}}\)

Discuss Question

Answer: Option B. -> \(q_1=q_2=q_3= \frac{2πkb(H-h)}{log_e \frac{R^3}{rB^2}}\)
Answer: (b).\(q_1=q_2=q_3= \frac{2πkb(H-h)}{log_e \frac{R^3}{rB^2}}\)