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Q:

At what angle the hands of a clock are inclined at 15 minutes past 5?

A) 57.5 degrees	B) 67.5 degrees
C) 77.5 degrees	D) 87.5 degrees

Answer & Explanation Answer: B) 67.5 degrees

Explanation:

Angle traced by hour hand in $\frac{21}{4}$ 21 hrs = ${(\frac{360}{12} \times \frac{21}{4})}^{0}$ = $157 \frac{1^{0}}{2}$

Angle traced by min. hand in 15 min = ${(\frac{360}{12} \times 15)}^{0}$ = $90^{0}$

$\therefore$ Required Angle = ${(157 \frac{1}{2})}^{0} - 90^{0}$ = $67 \frac{1^{0}}{2}$

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Filed Under: Clocks
Exam Prep: Bank Exams
Job Role: Bank PO

Q:

The angle between the minute hand and the hour hand of a clock when the time is 4.20, is:

A) 0	B) 10
C) 30	D) 60

Answer & Explanation Answer: B) 10

Explanation:

Angle traced by hour hand in $\frac{13}{3}$ hrs = ${(\frac{360}{12} \times \frac{13}{3})}^{0}$ = $130^{0}$

Angle traced by min. hand in 20 min = ${(\frac{360}{60} \times 20)}^{0}$ = $120^{0}$

Required angle = (130 - 120)º = 10º

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Filed Under: Clocks
Exam Prep: Bank Exams
Job Role: Bank PO

Q:

In nuclear reactor the speed of neutrons is slowed down by

A) heavy water	B) ordinary water
C) Zinc rods	D) molten caustic soda

Answer & Explanation Answer: A) heavy water

Explanation:

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Filed Under: Chemistry

Q:

When the nucleus of Uranium is bombarded with neutrons, it breaks up into two nuclei of nearly equal mass. this process is called

A) nuclear fission	B) nuclear fusion
C) physical change	D) artificial radioactivity

Answer & Explanation Answer: A) nuclear fission

Explanation:

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Filed Under: Chemistry

Q:

The first indication that a stable nucleus can be broken down was afforded by

A) Rutherford	B) Madam Curie
C) Soddy	D) Schmidt

Answer & Explanation Answer: A) Rutherford

Explanation:

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Filed Under: Chemistry

Q:

Group displacement law was given by

A) Bacquerel	B) Rutherford
C) Mendeleaf	D) Soddy and Fajan

Answer & Explanation Answer: D) Soddy and Fajan

Explanation:

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Filed Under: Chemistry

Q:

A device used for the measurement of radioactivity is

A) mass spectrometer	B) cyclotron
C) nuclear reactor	D) G.M.counter

Answer & Explanation Answer: D) G.M.counter

Explanation:

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Filed Under: Chemistry

Q:

There is a family of six persons A, B, C, D, E and F. They are Lawyer, Doctor, Teacher, Salesman, Engineer and Accountant There are two married couples in the family. D, the Salesman is married to the Lady Teacher. The Doctor is married to the Lawyer. F, the Accountant is the son of B and brother of E. C, the Lawyer is the daughter-in-law of A. E is the unmarried Engineer. A is the grandmother of F. What is the profession of B ?

A) Teacher	B) Doctor
C) Lawyer	D) None of these

Answer & Explanation Answer: B) Doctor

Explanation:

C is the daughter-in-law of A who is the grandmother of F means C is the mother of F But F is the son of B.

So, B is C's husband. But C, the lawyer is married to the Doctor So, B is the Doctor. F, the Accountant, will be the son of B and C, E is the unmarried Engineer.

So, the other named couple can be that of grandmother of F. i.e, A and D But D, the Salesman, is married to the Lady Teacher. So, D, the Salesman, is the grandfather of F, father of B and the husband of A, the Lady Teacher.

Clearly, B is the Doctor.

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Filed Under: Blood Relations

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